The branching fraction of the rare B0sφμ+μ-decay is measured using data collected by the LHCb experiment at center-of-mass energies of 7, 8 and 13 TeV, corresponding to integrated luminosities of 1, 2 and 6 fb-1, r...
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Multi-atlas segmentation approach is one of the most widely-used image segmentation techniques in biomedical applications. There are two major challenges in this category of methods, i.e., atlas selection and label fu...
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The ratio of the Bs0 and B0 fragmentation fractions, fs/fd, in proton-proton collisions at the LHC, is obtained as a function of B-meson transverse momentum and collision center-of-mass energy from the combined analys...
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The ratio of the Bs0 and B0 fragmentation fractions, fs/fd, in proton-proton collisions at the LHC, is obtained as a function of B-meson transverse momentum and collision center-of-mass energy from the combined analysis of different B-decay channels measured by the LHCb experiment. The results are described by a linear function of the meson transverse momentum or with a function inspired by Tsallis statistics. Precise measurements of the branching fractions of the Bs0→J/ψϕ and Bs0→Ds−π+ decays are performed, reducing their uncertainty by about a factor of 2 with respect to previous world averages. Numerous Bs0 decay branching fractions, measured at the LHCb experiment, are also updated using the new values of fs/fd and branching fractions of normalization channels. These results reduce a major source of systematic uncertainty in several searches for new physics performed through measurements of Bs0 branching fractions.
The first observation of the Ωb−→Ξc+K−π− decay is reported using p p collision data at center of mass energies of 7, 8, and 13 TeV collected by the LHCb experiment, corresponding to an integrated luminosity of 9 ...
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The first observation of the Ωb−→Ξc+K−π− decay is reported using p p collision data at center of mass energies of 7, 8, and 13 TeV collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1. Four excited Ωc0 baryons are observed in the Ξc+ K− mass projection of the Ωb−→Ξc+K−π− decays with the significance of each exceeding five standard deviations. They coincide with the states previously observed in prompt pp and e+e− production. Relative production rates, masses, and natural widths of the states are measured, and a test of spin hypotheses is performed. Moreover, the branching ratio of Ωb−→Ξc+K−π− is measured relative to the Ωb−→Ωc0π− decay mode and a precise measurement of the Ωb− mass of 6044.3±1.2±1.1−0.22+0.19 MeV is obtained.
A search for CP violation in charmless three-body Ξb- → pK-K- decays is performed using pp collision data recorded with the LHCb detector, corresponding to integrated luminosities of 1 fb-1 at a centre-of-mass ener...
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The first observation of exotic states with a new quark content ccus decaying to the J/ψK+ final state is reported with high significance from an amplitude analysis of the B+ → J/ψφK+ decay. The analysis is carrie...
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A search for CP violation in charmless three-body Ξb−→pK−K− decays is performed using pp collision data recorded with the LHCb detector, corresponding to integrated luminosities of 1 fb−1 at a center-of-mass energy...
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A search for CP violation in charmless three-body Ξb−→pK−K− decays is performed using pp collision data recorded with the LHCb detector, corresponding to integrated luminosities of 1 fb−1 at a center-of-mass energy s=7 TeV, 2 fb−1 at s=8 TeV and 2 fb−1 at s=13 TeV. A good description of the phase-space distribution is obtained with an amplitude model containing contributions from Σ(1385), Λ(1405), Λ(1520), Λ(1670), Σ(1775) and Σ(1915) resonances. The model allows for CP -violation effects, which are found to be consistent with zero. The branching fractions of Ξb−→Σ(1385)K−, Ξb−→Λ(1405)K−, Ξb−→Λ(1520)K−, Ξb−→Λ(1670)K−, Ξb−→Σ(1775)K− and Ξb−→Σ(1915)K− decays are also reported. In addition, an upper limit is placed on the product of ratios of Ωb− and Ξb− fragmentation fractions and the Ωb−→pK−K− and Ξb−→pK−K− branching fractions.
The first observations of (Equation presented) and (Equation presented) decays are presented, and their branching fractions relative to that of the (Equation presented) decay are reported. These modes can potentially ...
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A data sample collected with the LHCb detector corresponding to an integrated luminosity of 9 fb−1 is used to measure eleven CP violation observables in B± → Dh± decays, where h is either a kaon or a pion. ...
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