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Chain length determines the folding rates of RNA (vol 102, pg L11, 2012)

BIOphysical JOURNAL 2012年第5期102卷 1235-1235页

作者： Hyeon, Changbong Thirumalai, D. [?] School of Computational Sciences Korea Institute for Advanced Study Seoul Korea [?] Biophysics Program Institute for Physical Science and Technology University of Maryland College Park Maryland

We show that the folding rates (kFs) of RNA are determined by N, the number of nucleotides. By assuming that the distribution of free-energy barriers separating the folded and the unfolded states is Gaussian, which follows from central limit theorem arguments and polymer physics concepts, we show that . Remarkably, the theory fits experimental rates spanning over 7 orders of magnitude with k0～1.0(μs)?1. Our finding suggests that the speed limit of RNA folding is ～1 ms, just as it is in the folding of globular proteins.

关键词： Nucleotides RNA Folding Energy barrier Speed limit Gauss polymer physics Central limit theorem RNA

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Search for supersymmetry with photons in pp collisions at s=8 TeV

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physical Review D 2015年第7期92卷 072006-072006页

作者： V. Khachatryan A. M. Sirunyan A. Tumasyan W. Adam E. Asilar T. Bergauer J. Brandstetter E. Brondolin M. Dragicevic J. Erö M. Flechl M. Friedl R. Frühwirth V. M. Ghete C. Hartl N. Hörmann J. Hrubec M. Jeitler V. Knünz A. König M. Krammer I. Krätschmer D. Liko T. Matsushita I. Mikulec D. Rabady B. Rahbaran H. Rohringer J. Schieck R. Schöfbeck J. Strauss W. Treberer-Treberspurg W. Waltenberger C.-E. Wulz V. Mossolov N. Shumeiko J. Suarez Gonzalez S. Alderweireldt T. Cornelis E. A. De Wolf X. Janssen A. Knutsson J. Lauwers S. Luyckx S. Ochesanu R. Rougny M. Van De Klundert H. Van Haevermaet P. Van Mechelen N. Van Remortel A. Van Spilbeeck S. Abu Zeid F. Blekman S. Blyweert J. D’Hondt N. Daci I. De Bruyn K. Deroover N. Heracleous J. Keaveney S. Lowette M. Maes L. Moreels A. Olbrechts Q. Python D. Strom S. Tavernier W. Van Doninck P. Van Mulders G. P. Van Onsem I. Van Parijs I. Villella P. Barria C. Caillol B. Clerbaux G. De Lentdecker H. Delannoy D. Dobur G. Fasanella L. Favart A. P. R. Gay A. Grebenyuk T. Lenzi A. Léonard T. Maerschalk A. Mohammadi L. Perniè A. Randle-conde T. Reis T. Seva C. Vander Velde P. Vanlaer J. Wang R. Yonamine F. Zenoni F. Zhang K. Beernaert L. Benucci A. Cimmino S. Crucy A. Fagot G. Garcia M. Gul J. Mccartin A. A. Ocampo Rios D. Poyraz D. Ryckbosch S. Salva M. Sigamani N. Strobbe M. Tytgat W. Van Driessche E. Yazgan N. Zaganidis S. Basegmez C. Beluffi O. Bondu G. Bruno R. Castello A. Caudron L. Ceard G. G. Da Silveira C. Delaere D. Favart L. Forthomme A. Giammanco J. Hollar A. Jafari P. Jez M. Komm V. Lemaitre A. Mertens C. Nuttens L. Perrini A. Pin K. Piotrzkowski A. Popov L. Quertenmont M. Selvaggi M. Vidal Marono N. Beliy T. Caebergs G. H. Hammad W. L. Aldá Júnior G. A. Alves L. Brito M. Correa Martins Junior T. Dos Reis Martins C. Hensel C. Mora Herrera A. Moraes M. E. Pol P. Rebello Teles E. Belchior Batista Das Chagas W. Carvalho J. Chinellato A. Custódio E. M. Da Costa D. De Jesus Damiao C. De Oliveira Martins S. Fonseca De Souza L. M. Huertas Guativa H. Malbouisson D. Matos Figueire Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik der OeAW Wien Austria National Centre for Particle and High Energy Physics Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Université de Mons Mons Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC Institute for Nuclear Research and Nuclear Energy Sofia Bulgaria University of Sofia Sofia Bulgaria National Centre for Physics Quaid-I-Azam University Islamabad Pakistan Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Vanderbilt University Nashville Tennessee 37235 USA Universidad de Los Andes Bogota Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland DSM/IRFU CEA/Saclay Gif-sur-Yvette France Laboratoire Leprince-Ringuet Ecole Polytechnique IN2P3-CNRS Palaiseau France Institut Pluridisciplinaire Hubert Curien Université de Strasbourg Université de Haute Alsace Mulhouse CNRS/IN2P3 Strasbourg France

Two searches for physics beyond the standard model in events containing photons are presented. The data sample used corresponds to an integrated luminosity of 19.7 fb−1 of proton-proton collisions at s=8 TeV, collected with the CMS experiment at the CERN LHC. The analyses pursue different inclusive search strategies. One analysis requires at least one photon, at least two jets, and a large amount of transverse momentum imbalance, while the other selects events with at least two photons and at least one jet, and uses the razor variables to search for signal events. The background expected from standard model processes is evaluated mainly from data. The results are interpreted in the context of general gauge-mediated supersymmetry, with the next-to-lightest supersymmetric particle either a bino- or wino-like neutralino, and within simplified model scenarios. Upper limits at the 95% confidence level are obtained for cross sections as functions of the masses of the intermediate supersymmetric particles.

关键词： SUPERSYMMETRY (Physics) PROTON-proton interactions STANDARD model (Nuclear physics) NUCLEAR counters LARGE Hadron Collider (France & Switzerland)

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Native gating behavior of ion channels in neurons with null-deviation modeling

Native gating behavior of ion channels in neurons with null-...

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第一届国际暨第十三次中国生物物理学术大会

作者： Wang Wei Luo Jie Pan-Pan Hou Yi-Mei Yang Feng Xiao Yu-chi Ming An-Lian Qu Lu-Yang Wang Jiu-Ping Ding Key Laboratory of Molecular Biophysics of the Ministry of Education Huazhong University of Science and Technology Program in Neurosciences and Mental Health Sick Kids Research Institute & Department of PhysiologyUniversity of Toronto

Computational modeling has emerged as an indispensable approach to resolve and predict the intricate interplay among the many Ion channels underlying neuronal ***,simulation results using the classic formula-based Hodgkin-Huxley(H-H)model or the superior Markov kinetic model of ion channels often deviate significantly from native cellular signals

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Measurements of jet multiplicity and differential production cross sections of Z+jets events in proton-proton collisions at s=7 TeV

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physical Review D 2015年第5期91卷 052008-052008页

作者： V. Khachatryan A. M. Sirunyan A. Tumasyan W. Adam T. Bergauer M. Dragicevic J. Erö C. Fabjan M. Friedl R. Frühwirth V. M. Ghete C. Hartl N. Hörmann J. Hrubec M. Jeitler W. Kiesenhofer V. Knünz M. Krammer I. Krätschmer D. Liko I. Mikulec D. Rabady B. Rahbaran H. Rohringer R. Schöfbeck J. Strauss A. Taurok W. Treberer-Treberspurg W. Waltenberger C.-E. Wulz V. Mossolov N. Shumeiko J. Suarez Gonzalez S. Alderweireldt M. Bansal S. Bansal T. Cornelis E. A. De Wolf X. Janssen A. Knutsson S. Luyckx S. Ochesanu B. Roland R. Rougny M. Van De Klundert H. Van Haevermaet P. Van Mechelen N. Van Remortel A. Van Spilbeeck F. Blekman S. Blyweert J. D’Hondt N. Daci N. Heracleous J. Keaveney S. Lowette M. Maes A. Olbrechts Q. Python D. Strom S. Tavernier W. Van Doninck P. Van Mulders G. P. Van Onsem I. Villella C. Caillol B. Clerbaux G. De Lentdecker D. Dobur L. Favart A. P. R. Gay A. Grebenyuk A. Léonard A. Mohammadi L. Perniè T. Reis T. Seva L. Thomas C. Vander Velde P. Vanlaer J. Wang V. Adler K. Beernaert L. Benucci A. Cimmino S. Costantini S. Crucy S. Dildick A. Fagot G. Garcia J. Mccartin A. A. Ocampo Rios D. Ryckbosch S. Salva Diblen M. Sigamani N. Strobbe F. Thyssen M. Tytgat E. Yazgan N. Zaganidis S. Basegmez C. Beluffi G. Bruno R. Castello A. Caudron L. Ceard G. G. Da Silveira C. Delaere T. du Pree D. Favart L. Forthomme A. Giammanco J. Hollar P. Jez M. Komm V. Lemaitre C. Nuttens D. Pagano L. Perrini A. Pin K. Piotrzkowski A. Popov L. Quertenmont M. Selvaggi M. Vidal Marono J. M. Vizan Garcia N. Beliy T. Caebergs E. Daubie G. H. Hammad W. L. Aldá Júnior G. A. Alves L. Brito M. Correa Martins Junior T. Dos Reis Martins C. Mora Herrera M. E. Pol W. Carvalho J. Chinellato A. Custódio E. M. Da Costa D. De Jesus Damiao C. De Oliveira Martins S. Fonseca De Souza H. Malbouisson D. Matos Figueiredo L. Mundim H. Nogima W. L. Prado Da Silva J. Santaolalla A. Santoro A. Sznajder E. J. Tonelli Manganote A. Vilela Pereira C. A. Bernardes S. Dogra T. R. Fernandez Perez Tomei E. M. Gregores P. G. Mercadante S. F. Novaes Sandra S. Padul Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik der OeAW Wien Austria National Centre for Particle and High Energy Physics Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Université de Mons Mons Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Federal do ABC São Paulo Brazil Universidade Estadual Paulista São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Sofia Bulgaria University of Sofia Sofia Bulgaria Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Rice University Houston USA Vanderbilt University Nashville USA Universidad de Los Andes Bogota Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland DSM/IRFU CEA/Saclay Gif-sur-Yvette France Laboratoire Leprince-Ringuet Ecole Polytechnique IN2P3-CNRS Palaiseau France Institut Pluridisciplinaire Hubert Curien Université de Strasbourg Université de Haute Alsace Mulhouse CNRS/IN2P3 Strasbourg France Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules CNRS

Measurements of differential cross sections are presented for the production of a Z boson and at least one hadronic jet in proton-proton collisions at s=7 TeV, recorded by the CMS detector, using a data sample corresponding to an integrated luminosity of 4.9 fb−1. The jet multiplicity distribution is measured for up to six jets. The differential cross sections are measured as a function of jet transverse momentum and pseudorapidity for the four highest transverse momentum jets. The distribution of the scalar sum of jet transverse momenta is also measured as a function of the jet multiplicity. The measurements are compared with theoretical predictions at leading and next-to-leading order in perturbative QCD.

关键词： PERTURBATIVE quantum chromodynamics HADRONIC atoms HADRONS PROTON-proton interactions BOSONS

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Search for supersymmetry using razor variables in events with b-tagged jets in pp collisions at s=8 TeV

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physical Review D 2015年第5期91卷 052018-052018页

作者： V. Khachatryan A. M. Sirunyan A. Tumasyan W. Adam T. Bergauer M. Dragicevic J. Erö M. Friedl R. Frühwirth V. M. Ghete C. Hartl N. Hörmann J. Hrubec M. Jeitler W. Kiesenhofer V. Knünz M. Krammer I. Krätschmer D. Liko I. Mikulec D. Rabady B. Rahbaran H. Rohringer R. Schöfbeck J. Strauss W. Treberer-Treberspurg W. Waltenberger C.-E. Wulz V. Mossolov N. Shumeiko J. Suarez Gonzalez S. Alderweireldt S. Bansal T. Cornelis E. A. De Wolf X. Janssen A. Knutsson J. Lauwers S. Luyckx S. Ochesanu R. Rougny M. Van De Klundert H. Van Haevermaet P. Van Mechelen N. Van Remortel A. Van Spilbeeck F. Blekman S. Blyweert J. D’Hondt N. Daci N. Heracleous J. Keaveney S. Lowette M. Maes A. Olbrechts Q. Python D. Strom S. Tavernier W. Van Doninck P. Van Mulders G. P. Van Onsem I. Villella C. Caillol B. Clerbaux G. De Lentdecker D. Dobur L. Favart A. P. R. Gay A. Grebenyuk A. Léonard A. Mohammadi L. Perniè A. Randle-conde T. Reis T. Seva L. Thomas C. Vander Velde P. Vanlaer J. Wang F. Zenoni V. Adler K. Beernaert L. Benucci A. Cimmino S. Costantini S. Crucy S. Dildick A. Fagot G. Garcia J. Mccartin A. A. Ocampo Rios D. Poyraz D. Ryckbosch S. Salva Diblen M. Sigamani N. Strobbe F. Thyssen M. Tytgat E. Yazgan N. Zaganidis S. Basegmez C. Beluffi G. Bruno R. Castello A. Caudron L. Ceard G. G. Da Silveira C. Delaere T. du Pree D. Favart L. Forthomme A. Giammanco J. Hollar A. Jafari P. Jez M. Komm V. Lemaitre C. Nuttens L. Perrini A. Pin K. Piotrzkowski A. Popov L. Quertenmont M. Selvaggi M. Vidal Marono J. M. Vizan Garcia N. Beliy T. Caebergs E. Daubie G. H. Hammad W. L. Aldá Júnior G. A. Alves L. Brito M. Correa Martins Junior T. Dos Reis Martins J. Molina C. Mora Herrera M. E. Pol P. Rebello Teles W. Carvalho J. Chinellato A. Custódio E. M. Da Costa D. De Jesus Damiao C. De Oliveira Martins S. Fonseca De Souza H. Malbouisson D. Matos Figueiredo L. Mundim H. Nogima W. L. Prado Da Silva J. Santaolalla A. Santoro A. Sznajder E. J. Tonelli Manganote A. Vilela Pereira C. A. Bernardes S. Dogra T. R. Fernandez Perez Tomei E. M. Gregores P. G. Merca Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik der OeAW Wien Austria National Centre for Particle and High Energy Physics Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Université de Mons Mons Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Federal do ABC São Paulo Brazil Universidade Estadual Paulista São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Sofia Bulgaria University of Sofia Sofia Bulgaria Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Vanderbilt University Nashville USA Universidad de Los Andes Bogota Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland DSM/IRFU CEA/Saclay Gif-sur-Yvette France Laboratoire Leprince-Ringuet Ecole Polytechnique IN2P3-CNRS Palaiseau France Institut Pluridisciplinaire Hubert Curien Université de Strasbourg Université de Haute Alsace Mulhouse CNRS/IN2P3 Strasbourg France Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules CNRS/IN2P3 Villeurbanne France U

An inclusive search for supersymmetry in events with at least one b-tagged jet is performed using proton-proton collision data collected by the CMS experiment in 2012 at a center-of-mass energy of 8 TeV. The data set size corresponds to an integrated luminosity of 19.3 fb−1. The two-dimensional distribution of the razor variables R2 and MR is studied in events with and without leptons. The data are found to be consistent with the expected background, which is modeled with an empirical function. Exclusion limits on supersymmetric particle masses at a 95% confidence level are derived in several simplified supersymmetric scenarios for several choices of the branching fractions. By combining the likelihoods of a search in events without leptons and a search that requires a single lepton (electron or muon), an improved bound on the top-squark mass is obtained. Assuming the lightest supersymmetric particle to be stable and weakly interacting, and to have a mass of 100 GeV, the branching-fraction-dependent (-independent) production of gluinos is excluded for gluino masses up to 1310 (1175) GeV. The corresponding limit for top-squark pair production is 730 (645) GeV.

关键词： PROTON-proton interactions LUMINOSITY ELECTRONS NEGATIVE muon SFERMION

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Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at s=8 TeV

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physical Review D 2015年第1期91卷 012007-012007页

作者： V. Khachatryan A. M. Sirunyan A. Tumasyan W. Adam T. Bergauer M. Dragicevic J. Erö C. Fabjan M. Friedl R. Frühwirth V. M. Ghete C. Hartl N. Hörmann J. Hrubec M. Jeitler W. Kiesenhofer V. Knünz M. Krammer I. Krätschmer D. Liko I. Mikulec D. Rabady B. Rahbaran H. Rohringer R. Schöfbeck J. Strauss A. Taurok W. Treberer-Treberspurg W. Waltenberger C.-E. Wulz V. Mossolov N. Shumeiko J. Suarez Gonzalez S. Alderweireldt M. Bansal S. Bansal T. Cornelis E. A. De Wolf X. Janssen A. Knutsson S. Luyckx S. Ochesanu B. Roland R. Rougny M. Van De Klundert H. Van Haevermaet P. Van Mechelen N. Van Remortel A. Van Spilbeeck F. Blekman S. Blyweert J. D’Hondt N. Daci N. Heracleous J. Keaveney S. Lowette M. Maes A. Olbrechts Q. Python D. Strom S. Tavernier W. Van Doninck P. Van Mulders G. P. Van Onsem I. Villella C. Caillol B. Clerbaux G. De Lentdecker D. Dobur L. Favart A. P. R. Gay A. Grebenyuk A. Léonard A. Mohammadi L. Perniè T. Reis T. Seva L. Thomas C. Vander Velde P. Vanlaer J. Wang V. Adler K. Beernaert L. Benucci A. Cimmino S. Costantini S. Crucy S. Dildick A. Fagot G. Garcia J. Mccartin A. A. Ocampo Rios D. Ryckbosch S. Salva Diblen M. Sigamani N. Strobbe F. Thyssen M. Tytgat E. Yazgan N. Zaganidis S. Basegmez C. Beluffi G. Bruno R. Castello A. Caudron L. Ceard G. G. Da Silveira C. Delaere T. du Pree D. Favart L. Forthomme A. Giammanco J. Hollar P. Jez M. Komm V. Lemaitre C. Nuttens D. Pagano L. Perrini A. Pin K. Piotrzkowski A. Popov L. Quertenmont M. Selvaggi M. Vidal Marono J. M. Vizan Garcia N. Beliy T. Caebergs E. Daubie G. H. Hammad W. L. Aldá Júnior G. A. Alves L. Brito M. Correa Martins Junior T. Dos Reis Martins C. Mora Herrera M. E. Pol W. Carvalho J. Chinellato A. Custódio E. M. Da Costa D. De Jesus Damiao C. De Oliveira Martins S. Fonseca De Souza H. Malbouisson D. Matos Figueiredo L. Mundim H. Nogima W. L. Prado Da Silva J. Santaolalla A. Santoro A. Sznajder E. J. Tonelli Manganote A. Vilela Pereira C. A. Bernardes S. Dogra T. R. Fernandez Perez Tomei E. M. Gregores P. G. Mercadante S. F. Novaes Sandra S. Padul Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik der OeAW Wien Austria National Centre for Particle and High Energy Physics Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Université de Mons Mons Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Federal do ABC São Paulo Brazil Universidade Estadual Paulista São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Sofia Bulgaria University of Sofia Sofia Bulgaria Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Rice University Houston Texas USA Vanderbilt University Nashville Tennessee USA Universidad de Los Andes Bogota Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland DSM/IRFU CEA/Saclay Gif-sur-Yvette France Laboratoire Leprince-Ringuet Ecole Polytechnique IN2P3-CNRS Palaiseau France Institut Pluridisciplinaire Hubert Curien Université de Strasbourg Université de Haute Alsace Mulhouse CNRS/IN2P3 Strasbourg France Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique de

A search is performed for long-lived massive neutral particles decaying to quark-antiquark pairs. The experimental signature is a distinctive topology of a pair of jets, originating at a secondary vertex. Events were collected with the CMS detector at the CERN LHC in proton-proton collisions at a center-of-mass energy of 8 TeV. The data analyzed correspond to an integrated luminosity of 18.5 fb−1. No significant excess is observed above standard model expectations. Upper limits at 95% confidence level are set on the production cross section of a heavy neutral scalar particle, H, in the mass range of 200 to 1000 GeV, decaying promptly into a pair of long-lived neutral X particles in the mass range of 50 to 350 GeV, each in turn decaying into a quark-antiquark pair. For X with mean proper decay lengths of 0.4 to 200 cm, the upper limits are typically 0.5–200 fb. The results are also interpreted in the context of an R-parity-violating supersymmetric model with long-lived neutralinos decaying into a quark-antiquark pair and a muon. For pair production of squarks that promptly decay to neutralinos with mean proper decay lengths of 2–40 cm, the upper limits on the cross section are typically 0.5–3 fb. The above limits are the most stringent on these channels to date.

关键词： QUARK-antiquark interactions PROTON-proton interactions CENTER of mass LARGE Hadron Collider (France & Switzerland) STANDARD model (Nuclear physics) PARITY (Physics) NEUTRALINOS

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Limits on the Higgs boson lifetime and width from its decay to four charged leptons

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physical Review D 2015年第7期92卷 072010-072010页

作者： V. Khachatryan A. M. Sirunyan A. Tumasyan W. Adam E. Asilar T. Bergauer J. Brandstetter E. Brondolin M. Dragicevic J. Erö M. Flechl M. Friedl R. Frühwirth V. M. Ghete C. Hartl N. Hörmann J. Hrubec M. Jeitler V. Knünz A. König M. Krammer I. Krätschmer D. Liko T. Matsushita I. Mikulec D. Rabady B. Rahbaran H. Rohringer J. Schieck R. Schöfbeck J. Strauss W. Treberer-Treberspurg W. Waltenberger C.-E. Wulz V. Mossolov N. Shumeiko J. Suarez Gonzalez S. Alderweireldt T. Cornelis E. A. De Wolf X. Janssen A. Knutsson J. Lauwers S. Luyckx S. Ochesanu R. Rougny M. Van De Klundert H. Van Haevermaet P. Van Mechelen N. Van Remortel A. Van Spilbeeck S. Abu Zeid F. Blekman J. D’Hondt N. Daci I. De Bruyn K. Deroover N. Heracleous J. Keaveney S. Lowette L. Moreels A. Olbrechts Q. Python D. Strom S. Tavernier W. Van Doninck P. Van Mulders G. P. Van Onsem I. Van Parijs P. Barria C. Caillol B. Clerbaux G. De Lentdecker H. Delannoy G. Fasanella L. Favart A. P. R. Gay A. Grebenyuk T. Lenzi A. Léonard T. Maerschalk A. Marinov L. Perniè A. Randle-conde T. Reis T. Seva C. Vander Velde P. Vanlaer R. Yonamine F. Zenoni F. Zhang K. Beernaert L. Benucci A. Cimmino S. Crucy D. Dobur A. Fagot G. Garcia M. Gul J. Mccartin A. A. Ocampo Rios D. Poyraz D. Ryckbosch S. Salva M. Sigamani N. Strobbe M. Tytgat W. Van Driessche E. Yazgan N. Zaganidis S. Basegmez C. Beluffi O. Bondu S. Brochet G. Bruno R. Castello A. Caudron L. Ceard G. G. Da Silveira C. Delaere D. Favart L. Forthomme A. Giammanco J. Hollar A. Jafari P. Jez M. Komm V. Lemaitre A. Mertens C. Nuttens L. Perrini A. Pin K. Piotrzkowski A. Popov L. Quertenmont M. Selvaggi M. Vidal Marono N. Beliy G. H. Hammad W. L. Aldá Júnior G. A. Alves L. Brito M. Correa Martins Junior M. Hamer C. Hensel C. Mora Herrera A. Moraes M. E. Pol P. Rebello Teles E. Belchior Batista Das Chagas W. Carvalho J. Chinellato A. Custódio E. M. Da Costa D. De Jesus Damiao C. De Oliveira Martins S. Fonseca De Souza L. M. Huertas Guativa H. Malbouisson D. Matos Figueiredo L. Mundim H. Nogima W. L. Prado Da Silva A. Santoro Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik der OeAW Wien Austria National Centre for Particle and High Energy Physics Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Université de Mons Mons Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista São Paulo Brazil Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Sofia Bulgaria University of Sofia Sofia Bulgaria National Centre for Physics Quaid-I-Azam University Islamabad Pakistan Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Vanderbilt University Nashville Tennessee 37235 USA Universidad de Los Andes Bogota Colombia Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture University of Split Split Croatia Faculty of Science University of Split Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland DSM/IRFU CEA/Saclay Gif-sur-Yvette France Laboratoire Leprince-Ringuet Ecole Polytechnique IN2P3-CNRS Palaiseau France Institut Pluridisciplinaire Hubert Curien Université de Strasbourg Université de Haute Alsace Mulhouse CNRS/IN2P3 Strasbourg France Centre de Calcul de l’Institut Natio

Constraints on the lifetime and width of the Higgs boson are obtained from H→ZZ→4ℓ events using data recorded by the CMS experiment during the LHC run 1 with an integrated luminosity of 5.1 and 19.7 fb−1 at a center-of-mass energy of 7 and 8 TeV, respectively. The measurement of the Higgs boson lifetime is derived from its flight distance in the CMS detector with an upper bound of τH<1.9×10−13 s at the 95% confidence level (C.L.), corresponding to a lower bound on the width of ΓH>3.5×10−9 MeV. The measurement of the width is obtained from an off-shell production technique, generalized to include anomalous couplings of the Higgs boson to two electroweak bosons. From this measurement, a joint constraint is set on the Higgs boson width and a parameter fΛQ that expresses an anomalous coupling contribution as an on-shell cross-section fraction. The limit on the Higgs boson width is ΓH<46 MeV with fΛQ unconstrained and ΓH<26 MeV for fΛQ=0 at the 95% C.L. The constraint fΛQ<3.8×10−3 at the 95% C.L. is obtained for the expected standard model Higgs boson width.

关键词： Higgs bosons Leptons (Nuclear physics) Constraints (Physics) Special relativity (Physics) physical measurements

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Constraints on the spin-parity and anomalous HVV couplings of the Higgs boson in proton collisions at 7 and 8 TeV

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physical Review D 2015年第1期92卷 012004-012004页

作者： V. Khachatryan A. M. Sirunyan A. Tumasyan W. Adam T. Bergauer M. Dragicevic J. Erö M. Friedl R. Frühwirth V. M. Ghete C. Hartl N. Hörmann J. Hrubec M. Jeitler W. Kiesenhofer V. Knünz M. Krammer I. Krätschmer D. Liko I. Mikulec D. Rabady B. Rahbaran H. Rohringer R. Schöfbeck J. Strauss W. Treberer-Treberspurg W. Waltenberger C.-E. Wulz V. Mossolov N. Shumeiko J. Suarez Gonzalez S. Alderweireldt S. Bansal T. Cornelis E. A. De Wolf X. Janssen A. Knutsson J. Lauwers S. Luyckx S. Ochesanu R. Rougny M. Van De Klundert H. Van Haevermaet P. Van Mechelen N. Van Remortel A. Van Spilbeeck F. Blekman S. Blyweert J. D’Hondt N. Daci N. Heracleous J. Keaveney S. Lowette M. Maes A. Olbrechts Q. Python D. Strom S. Tavernier W. Van Doninck P. Van Mulders G. P. Van Onsem I. Villella C. Caillol B. Clerbaux G. De Lentdecker D. Dobur L. Favart A. P. R. Gay A. Grebenyuk A. Léonard A. Mohammadi L. Perniè A. Randle-conde T. Reis T. Seva L. Thomas C. Vander Velde P. Vanlaer J. Wang F. Zenoni V. Adler K. Beernaert L. Benucci A. Cimmino S. Costantini S. Crucy S. Dildick A. Fagot G. Garcia J. Mccartin A. A. Ocampo Rios D. Ryckbosch S. Salva Diblen M. Sigamani N. Strobbe F. Thyssen M. Tytgat E. Yazgan N. Zaganidis S. Basegmez C. Beluffi G. Bruno R. Castello A. Caudron L. Ceard G. G. Da Silveira C. Delaere T. du Pree D. Favart L. Forthomme A. Giammanco J. Hollar A. Jafari P. Jez M. Komm V. Lemaitre C. Nuttens L. Perrini A. Pin K. Piotrzkowski A. Popov L. Quertenmont M. Selvaggi M. Vidal Marono J. M. Vizan Garcia N. Beliy T. Caebergs E. Daubie G. H. Hammad W. L. Aldá Júnior G. A. Alves L. Brito M. Correa Martins Junior T. Dos Reis Martins J. Molina C. Mora Herrera M. E. Pol P. Rebello Teles W. Carvalho J. Chinellato A. Custódio E. M. Da Costa D. De Jesus Damiao C. De Oliveira Martins S. Fonseca De Souza H. Malbouisson D. Matos Figueiredo L. Mundim H. Nogima W. L. Prado Da Silva J. Santaolalla A. Santoro A. Sznajder E. J. Tonelli Manganote A. Vilela Pereira C. A. Bernardes S. Dogra T. R. Fernandez Perez Tomei E. M. Gregores P. G. Mercadante S. F Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik der OeAW Wien Austria National Centre for Particle and High Energy Physics Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Université de Mons Mons Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Federal do ABC São Paulo Brazil Universidade Estadual Paulista São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Sofia Bulgaria University of Sofia Sofia Bulgaria Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Vanderbilt University Nashville USA Universidad de Los Andes Bogota Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland DSM/IRFU CEA/Saclay Gif-sur-Yvette France Laboratoire Leprince-Ringuet Ecole Polytechnique IN2P3-CNRS Palaiseau France Institut Pluridisciplinaire Hubert Curien Université de Strasbourg Université de Haute Alsace Mulhouse CNRS/IN2P3 Strasbourg France Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules CNRS/IN2P3 Villeurbanne France U

The study of the spin-parity and tensor structure of the interactions of the recently discovered Higgs boson is performed using the H→ZZ,Zγ*,γ*γ*→4ℓ, H→WW→ℓνℓν, and H→γγ decay modes. The full data set recorded by the CMS experiment during the LHC run 1 is used, corresponding to an integrated luminosity of up to 5.1 fb−1 at a center-of-mass energy of 7 TeV and up to 19.7 fb−1 at 8 TeV. A wide range of spin-two models is excluded at a 99% confidence level or higher, or at a 99.87% confidence level for the minimal gravitylike couplings, regardless of whether assumptions are made on the production mechanism. Any mixed-parity spin-one state is excluded in the ZZ and WW modes at a greater than 99.999% confidence level. Under the hypothesis that the resonance is a spin-zero boson, the tensor structure of the interactions of the Higgs boson with two vector bosons ZZ, Zγ, γγ, and WW is investigated and limits on eleven anomalous contributions are set. Tighter constraints on anomalous HVV interactions are obtained by combining the HZZ and HWW measurements. All observations are consistent with the expectations for the standard model Higgs boson with the quantum numbers JPC=0++.

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Measurement of diffractive dissociation cross sections in pp collisions at s=7 TeV

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physical Review D 2015年第1期92卷 012003-012003页

作者： V. Khachatryan A. M. Sirunyan A. Tumasyan W. Adam T. Bergauer M. Dragicevic J. Erö C. Fabjan M. Friedl R. Frühwirth V. M. Ghete C. Hartl N. Hörmann J. Hrubec M. Jeitler W. Kiesenhofer V. Knünz M. Krammer I. Krätschmer D. Liko I. Mikulec D. Rabady B. Rahbaran H. Rohringer R. Schöfbeck J. Strauss A. Taurok W. Treberer-Treberspurg W. Waltenberger C.-E. Wulz V. Mossolov N. Shumeiko J. Suarez Gonzalez S. Alderweireldt M. Bansal S. Bansal T. Cornelis E. A. De Wolf X. Janssen A. Knutsson S. Luyckx S. Ochesanu R. Rougny M. Van De Klundert H. Van Haevermaet P. Van Mechelen N. Van Remortel A. Van Spilbeeck F. Blekman S. Blyweert J. D’Hondt N. Daci N. Heracleous J. Keaveney S. Lowette M. Maes A. Olbrechts Q. Python D. Strom S. Tavernier W. Van Doninck P. Van Mulders G. P. Van Onsem I. Villella C. Caillol B. Clerbaux G. De Lentdecker D. Dobur L. Favart A. P. R. Gay A. Grebenyuk A. Léonard A. Mohammadi L. Perniè T. Reis T. Seva L. Thomas C. Vander Velde P. Vanlaer J. Wang F. Zenoni V. Adler K. Beernaert L. Benucci A. Cimmino S. Costantini S. Crucy S. Dildick A. Fagot G. Garcia J. Mccartin A. A. Ocampo Rios D. Ryckbosch S. Salva Diblen M. Sigamani N. Strobbe F. Thyssen M. Tytgat E. Yazgan N. Zaganidis S. Basegmez C. Beluffi G. Bruno R. Castello A. Caudron L. Ceard G. G. Da Silveira C. Delaere T. du Pree D. Favart L. Forthomme A. Giammanco J. Hollar A. Jafari P. Jez M. Komm V. Lemaitre C. Nuttens D. Pagano L. Perrini A. Pin K. Piotrzkowski A. Popov L. Quertenmont M. Selvaggi M. Vidal Marono J. M. Vizan Garcia N. Beliy T. Caebergs E. Daubie G. H. Hammad W. L. Aldá Júnior G. A. Alves L. Brito M. Correa Martins Junior T. Dos Reis Martins C. Mora Herrera M. E. Pol W. Carvalho J. Chinellato A. Custódio E. M. Da Costa D. De Jesus Damiao C. De Oliveira Martins S. Fonseca De Souza H. Malbouisson D. Matos Figueiredo L. Mundim H. Nogima W. L. Prado Da Silva J. Santaolalla A. Santoro A. Sznajder E. J. Tonelli Manganote A. Vilela Pereira C. A. Bernardes S. Dogra T. R. Fernandez Perez Tomei E. M. Gregores P. G. Mercadante S. F. Novaes Sandr Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik der OeAW Wien Austria National Centre for Particle and High Energy Physics Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Université de Mons Mons Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Federal do ABC São Paulo Brazil Universidade Estadual Paulista São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Sofia Bulgaria University of Sofia Sofia Bulgaria Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Vanderbilt University Nashville Tennessee 37235 USA Universidad de Los Andes Bogota Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland DSM/IRFU CEA Saclay 91191 Gif-sur-Yvette cedex France Laboratoire Leprince-Ringuet Ecole Polytechnique IN2P3-CNRS Palaiseau France Institut Pluridisciplinaire Hubert Curien Université de Strasbourg Université de Haute Alsace Mulhouse CNRS/IN2P3 Strasbourg France Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules CNRS/

Measurements of diffractive dissociation cross sections in pp collisions at s=7 TeV are presented in kinematic regions defined by the masses MX and MY of the two final-state hadronic systems separated by the largest rapidity gap in the event. Differential cross sections are measured as a function of ξX=MX2/s in the region −5.53, log10MX>1.1, and log10MY>1.1, a region dominated by DD. The cross sections integrated over these regions are found to be, respectively, 2.99±0.02(stat)−0.29+0.32(syst) mb, 1.18±0.02(stat)±0.13(syst) mb, and 0.58±0.01(stat)−0.11+0.13(syst) mb, and are used to extract extrapolated total SD and DD cross sections. In addition, the inclusive differential cross section, dσ/dΔηF, for events with a pseudorapidity gap adjacent to the edge of the detector, is measured over ΔηF=8.4 units of pseudorapidity. The results are compared to those of other experiments and to theoretical predictions and found compatible with slowly rising diffractive cross sections as a function of center-of-mass energy.

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Search for physics beyond the standard model in final states with a lepton and missing transverse energy in proton-proton collisions at s=8 TeV

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physical Review D 2015年第9期91卷 092005-092005页

作者： V. Khachatryan A. M. Sirunyan A. Tumasyan W. Adam T. Bergauer M. Dragicevic J. Erö C. Fabjan M. Friedl R. Frühwirth V. M. Ghete C. Hartl N. Hörmann J. Hrubec M. Jeitler W. Kiesenhofer V. Knünz M. Krammer I. Krätschmer D. Liko I. Mikulec D. Rabady B. Rahbaran H. Rohringer R. Schöfbeck J. Strauss A. Taurok W. Treberer-Treberspurg W. Waltenberger C.-E. Wulz V. Mossolov N. Shumeiko J. Suarez Gonzalez S. Alderweireldt M. Bansal S. Bansal T. Cornelis E. A. De Wolf X. Janssen A. Knutsson S. Luyckx S. Ochesanu B. Roland R. Rougny M. Van De Klundert H. Van Haevermaet P. Van Mechelen N. Van Remortel A. Van Spilbeeck F. Blekman S. Blyweert J. D’Hondt N. Daci N. Heracleous A. Kalogeropoulos J. Keaveney T. J. Kim S. Lowette M. Maes A. Olbrechts Q. Python D. Strom S. Tavernier W. Van Doninck P. Van Mulders G. P. Van Onsem I. Villella C. Caillol B. Clerbaux G. De Lentdecker D. Dobur L. Favart A. P. R. Gay A. Grebenyuk A. Léonard A. Mohammadi L. Perniè T. Reis T. Seva L. Thomas C. Vander Velde P. Vanlaer J. Wang V. Adler K. Beernaert L. Benucci A. Cimmino S. Costantini S. Crucy S. Dildick A. Fagot G. Garcia J. Mccartin A. A. Ocampo Rios D. Ryckbosch S. Salva Diblen M. Sigamani N. Strobbe F. Thyssen M. Tytgat E. Yazgan N. Zaganidis S. Basegmez C. Beluffi G. Bruno R. Castello A. Caudron L. Ceard G. G. Da Silveira C. Delaere T. du Pree D. Favart L. Forthomme A. Giammanco J. Hollar P. Jez M. Komm V. Lemaitre J. Liao C. Nuttens D. Pagano L. Perrini A. Pin K. Piotrzkowski A. Popov L. Quertenmont M. Selvaggi M. Vidal Marono J. M. Vizan Garcia N. Beliy T. Caebergs E. Daubie G. H. Hammad W. L. Aldá Júnior G. A. Alves M. Correa Martins Junior T. Dos Reis Martins M. E. Pol W. Carvalho J. Chinellato A. Custódio E. M. Da Costa D. De Jesus Damiao C. De Oliveira Martins S. Fonseca De Souza H. Malbouisson M. Malek D. Matos Figueiredo L. Mundim H. Nogima W. L. Prado Da Silva J. Santaolalla A. Santoro A. Sznajder E. J. Tonelli Manganote A. Vilela Pereira C. A. Bernardes F. A. Dias T. R. Fernandez Perez Tomei E. M. Gregores P. G. Mercadante S. F. Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik der OeAW Wien Austria National Centre for Particle and High Energy Physics Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Université de Mons Mons Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Federal do ABC São Paulo Brazil Universidade Estadual Paulista São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Sofia Bulgaria University of Sofia Sofia Bulgaria Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Rice University Houston Texas 77251 USA Vanderbilt University Nashville Tennessee 37235 USA Universidad de Los Andes Bogota Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland DSM/IRFU CEA/Saclay Gif-sur-Yvette France Laboratoire Leprince-Ringuet Ecole Polytechnique IN2P3-CNRS Palaiseau France Institut Pluridisciplinaire Hubert Curien Université de Strasbourg Université de Haute Alsace Mulhouse CNRS/IN2P3 Strasbourg France Centre de Calcul de l’Institut National de Physique Nucleaire et de

A search for new physics in proton-proton collisions having final states with an electron or muon and missing transverse energy is presented. The analysis uses data collected in 2012 with the CMS detector, at an LHC center-of-mass energy of 8 TeV, and corresponding to an integrated luminosity of 19.7 fb−1. No significant deviation of the transverse mass distribution of the charged lepton-neutrino system from the standard model prediction is found. Mass exclusion limits of up to 3.28 TeV at 95% confidence level for a W′-boson with the same couplings as that of the standard model W-boson are determined. Results are also derived in the framework of split universal extra dimensions, and exclusion limits on Kaluza–Klein WKK(2) states are found. The final state with large missing transverse energy also enables a search for dark matter production with a recoiling W-boson, with limits set on the mass and the production cross section of potential candidates. Finally, limits are established for a model including interference between a left-handed W′-boson and the standard model W-boson and for a compositeness model.

关键词： STANDARD model (Nuclear physics) LEPTONS (Nuclear physics) PROTON-proton interactions ELECTRONS COMPACT muon solenoid experiment CENTER of mass BOSONS

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