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${{\mathit B}_{{c}}^{+}}$ MEAN LIFE

INSPIRE   PDGID:

S091T

``OUR EVALUATION'' is an average using rescaled values of the data listed below. The average and rescaling were performed by the Heavy Flavor Averaging Group (HFLAV) and are described at https://hflav.web.cern.ch/. The averaging/rescaling procedure takes into account correlations between the measurements.

VALUE ($ 10^{-12} $ s) DOCUMENT ID TECN  COMMENT $\bf{ 0.510 \pm0.009}$ OUR EVALUATION $\bf{ 0.510 \pm0.009}$ OUR AVERAGE $0.541$ $\pm0.026$ $\pm0.014$ 1 SIRUNYAN 2018 BY CMS ${{\mathit p}}{{\mathit p}}$ at 8 TeV $0.5134$ $\pm0.0110$ $\pm0.0057$ 2, 3 AAIJ 2015 G LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV $0.509$ $\pm0.008$ $\pm0.012$ 4 AAIJ 2014 G LHCB ${{\mathit p}}{{\mathit p}}$ at 8 TeV $0.452$ $\pm0.048$ $\pm0.027$ 3 AALTONEN 2013 CDF ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV $0.448$ ${}^{+0.038}_{-0.036}$ $\pm0.032$ 5 ABAZOV 2009 H D0 ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV $0.463$ ${}^{+0.073}_{-0.065}$ $\pm0.036$ 5 ABULENCIA 2006 O CDF ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV $0.46$ ${}^{+0.18}_{-0.16}$ $\pm0.03$ 5 ABE 1998 M CDF ${{\mathit p}}{{\overline{\mathit p}}}$ $1.8$ TeV 1  The lifetime is measured using the decays ${{\mathit B}_{{c}}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \pi}^{+}}$ and ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}^{+}}$ . 2  Also measures the width difference $\Delta \Gamma $ = ${\Gamma}_{{\mathit B}_{{c}}^{+}}−$ ${\Gamma}_{{\mathit B}^{+}}$ = $4.46$ $\pm0.14$ $\pm0.07$ mm${}^{-1}~$c. 3  Uses fully reconstructed ${{\mathit B}_{{c}}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \pi}^{+}}$ decays. 4  Measured using ${{\mathit B}_{{c}}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \mu}^{+}}{{\mathit \nu}_{{\mu}}}{{\mathit X}}$ decays. 5  The lifetime is measured from the ${{\mathit J / \psi}}{{\mathit e}}$ decay vertices.

References:

SIRUNYAN 2018BY EPJ C78 457 Measurement of b hadron lifetimes in pp collisions at $\sqrt{s} =$ 8 TeV AAIJ 2015G PL B742 29 Measurement of the Lifetime of the ${{\mathit B}_{{c}}^{+}}$ Meson using the Decay Mode AAIJ 2014G EPJ C74 2839 Measurement of the ${{\mathit B}_{{c}}^{+}}$ Meson Lifetime using ${{\mathit B}_{{c}}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \mu}^{+}}{{\mathit \nu}_{{\mu}}}{{\mathit X}}$ Decays AALTONEN 2013 PR D87 011101 Measurement of the ${{\mathit B}_{{c}}^{-}}$ Meson Lifetime in the Decay ${{\mathit B}_{{c}}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \pi}^{-}}$ ABAZOV 2009H PRL 102 092001 Measurement of the Lifetime of the ${{\mathit B}_{{c+-}}}$ Meson in the Semileptonic Decay Channel ABULENCIA 2006O PRL 97 012002 Measurement of the ${{\mathit B}_{{c}}^{+}}$ Meson Lifetime using the Decay Mode ${{\mathit B}_{{c}}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit e}^{+}}{{\mathit \nu}_{{e}}}$ ABE 1998M PRL 81 2432 Observation of ${{\mathit B}_{{c}}}$ Mesons in ${{\mathit p}}{{\overline{\mathit p}}}$ Collisions at $\sqrt {s }$ = 1.8 TeV Also PR D58 112004 Observation of ${{\mathit B}_{{c}}}$ Mesons in ${{\mathit p}}{{\overline{\mathit p}}}$ Collisions at $\sqrt {s }$ = 1.8 TeV