13 research outputs found
Prospects for the Bc Studies at LHCb
We discuss the motivations and perspectives for the studies of the mesons of
the (bc) family at LHCb. The description of production and decays at LHC
energies is given in details. The event yields, detection efficiencies, and
background conditions for several Bc decay modes at LHCb are estimated.Comment: 20 pages, 5 eps-figure
Gold-plated Mode of CP-Violation in Decays of B_c Meson from QCD Sum Rules
The model-independent method based on the triangle ideology is implemented to
extract the CKM-matrix angle gamma in the decays of doubly heavy long-lived
meson B_c. We analyze a color structure of diagrams and conditions to
reconstruct two reference-triangles by tagging the flavor and CP eigenstates of
D^0 meson in the fixed exclusive channels. The characteristic branching ratios
are evaluated in the framework of QCD sum rules.Comment: 11 pages, RevTeX4 file, 4 eps-figure
Evidence for the decay \mathrm{B}_{\mathrm{c}}^{+}\to {{\mathrm{J}} \left/ {{\uppsi\;3{\uppi^{+}}2{\uppi^{-}}}} \right.}
Measurement of the B+c meson lifetime using B+câJ/ÏÎŒ+ΜΌX decays
The lifetime of the meson is measured using semileptonic decays
having a meson and a muon in the final state. The data,
corresponding to an integrated luminosity of , are
collected by the LHCb detector in collisions at a centre-of-mass energy of
. The measured lifetime is where the first uncertainty is statistical and the second is
systematic
Measurement of the lifetime of the meson using the decay mode
The difference in total widths between the and mesons is
measured using 3.0fb of data collected by the LHCb experiment in 7 and 8
TeV centre-of-mass energy proton-proton collisions at the LHC. Through the
study of the time evolution of and
decays, the width difference is measured to be
where the first uncertainty is statistical and the second
systematic. The known lifetime of the meson is used to convert this to a
precise measurement of the lifetime,
where the first uncertainty is
statistical and the second systematic.Comment: 19 pagers, 3 figure
Measurement of the ratio of branching fractions
The ratio of branching fractions is measured with
collision data collected by the LHCb experiment at centre-of-mass energies of 7
TeV and 8 TeV, corresponding to an integrated luminosity of
3{\mbox{fb}^{-1}}. It is found to be ,
where the first uncertainty is statistical and the second is systematic. This
measurement is consistent with the previous LHCb result, while the
uncertainties are significantly reduced.Comment: All figures and tables, along with any supplementary material and
additional information, are available at
https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2016-020.htm