Measurement of the lifetime of the $B_c^+$ meson using the $B_c^+\rightarrow J/\psi\pi^+$ decay mode - INSPIRE

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Measurement of the lifetime of the $B_c^+$ meson using the $B_c^+\rightarrow J/\psi\pi^+$ decay mode

LHCb

Collaboration

Nov 25, 2014

9 pages

Published in:

Phys.Lett.B 742 (2015) 29-37

Published: Mar 6, 2015

e-Print:

1411.6899 [hep-ex]

DOI:

10.1016/j.physletb.2015.01.010

PDG:

{{\mathit B}_{{{c}}}^{+}}

Report number:

CERN-PH-EP-2014-283,
LHCB-PAPER-2014-060

Experiments:

CERN-LHC-LHCb

View in:

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Abstract: (Elsevier)

The difference in total widths between the Bc+ and B+ mesons is measured using a data sample corresponding to an integrated luminosity of 3.0 fb−1 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 Bc+→J/ψπ+ and B+→J/ψK+ decays, the width difference is measured to be ΔΓ≡ΓBc+−ΓB+=4.46±0.14±0.07 mm−1c, where the first uncertainty is statistical and the second systematic. The known lifetime of the B+ meson is used to convert this to a precise measurement of the Bc+ lifetime, τBc+=513.4±11.0±5.7 fs, where the first uncertainty is statistical and the second is systematic.

Note:

19 pagers, 3 figures

p p: colliding beams
width: difference
p p: scattering
B+: lifetime
B/c+: lifetime: measured
B+: hadronic decay
B/c+: hadronic decay
bottom meson: lifetime
error: statistical
CERN LHC Coll

References(65)

Figures(0)

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