Measurements of B+c production and mass with the B+c→J/ψπ+ decay

The LHCb Collaboration; Matthew Needham; Franz Muheim; Peter Clarke; Yuehong Xie; Stephan Eisenhardt

doi:10.1103/PhysRevLett.109.232001

Measurements of B+c production and mass with the B+c→J/ψπ+ decay

The LHCb Collaboration, Matthew Needham, Franz Muheim, Peter Clarke, Yuehong Xie, Stephan Eisenhardt

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

Measurements of Bc+ production and mass are performed with the decay mode Bc+→J/ψπ+ using 0.37 fb-1 of data collected in pp collisions at √s=7 TeV by the LHCb experiment. The ratio of the production cross section times branching fraction between the Bc+→J/ψπ+ and the B+→J/ψK+ decays is measured to be (0.68±0.10(stat)±0.03(syst)±0.05(lifetime))% for Bc+ and B+ mesons with transverse momenta pT>4 GeV/c and pseudorapidities 2.5<η<4.5. The Bc+ mass is directly measured to be 6273.7±1.3(stat)±1.6(syst) MeV/c2, and the measured mass difference with respect to the B+ meson is M(Bc+)-M(B+)=994.6±1.3(stat)±0.6(syst) MeV/c2.

Original language	English
Pages (from-to)	232001
Number of pages	1
Journal	Physical Review Letters
Volume	109
Early online date	25 Sep 2012
DOIs	https://doi.org/10.1103/PhysRevLett.109.232001
Publication status	Published - 5 Dec 2012

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title = "Measurements of B+c production and mass with the B+c→J/ψπ+ decay",

abstract = "Measurements of Bc+ production and mass are performed with the decay mode Bc+→J/ψπ+ using 0.37 fb-1 of data collected in pp collisions at √s=7 TeV by the LHCb experiment. The ratio of the production cross section times branching fraction between the Bc+→J/ψπ+ and the B+→J/ψK+ decays is measured to be (0.68±0.10(stat)±0.03(syst)±0.05(lifetime))% for Bc+ and B+ mesons with transverse momenta pT>4 GeV/c and pseudorapidities 2.5<η<4.5. The Bc+ mass is directly measured to be 6273.7±1.3(stat)±1.6(syst) MeV/c2, and the measured mass difference with respect to the B+ meson is M(Bc+)-M(B+)=994.6±1.3(stat)±0.6(syst) MeV/c2.",

author = "Stephen Playfer and {The LHCb Collaboration} and Matthew Needham and Franz Muheim and Peter Clarke and Yuehong Xie and Stephan Eisenhardt",

year = "2012",

month = dec,

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doi = "10.1103/PhysRevLett.109.232001",

language = "English",

volume = "109",

pages = "232001",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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TY - JOUR

T1 - Measurements of B+c production and mass with the B+c→J/ψπ+ decay

AU - Playfer, Stephen

AU - The LHCb Collaboration

AU - Needham, Matthew

AU - Muheim, Franz

AU - Clarke, Peter

AU - Xie, Yuehong

AU - Eisenhardt, Stephan

PY - 2012/12/5

Y1 - 2012/12/5

N2 - Measurements of Bc+ production and mass are performed with the decay mode Bc+→J/ψπ+ using 0.37 fb-1 of data collected in pp collisions at √s=7 TeV by the LHCb experiment. The ratio of the production cross section times branching fraction between the Bc+→J/ψπ+ and the B+→J/ψK+ decays is measured to be (0.68±0.10(stat)±0.03(syst)±0.05(lifetime))% for Bc+ and B+ mesons with transverse momenta pT>4 GeV/c and pseudorapidities 2.5<η<4.5. The Bc+ mass is directly measured to be 6273.7±1.3(stat)±1.6(syst) MeV/c2, and the measured mass difference with respect to the B+ meson is M(Bc+)-M(B+)=994.6±1.3(stat)±0.6(syst) MeV/c2.

AB - Measurements of Bc+ production and mass are performed with the decay mode Bc+→J/ψπ+ using 0.37 fb-1 of data collected in pp collisions at √s=7 TeV by the LHCb experiment. The ratio of the production cross section times branching fraction between the Bc+→J/ψπ+ and the B+→J/ψK+ decays is measured to be (0.68±0.10(stat)±0.03(syst)±0.05(lifetime))% for Bc+ and B+ mesons with transverse momenta pT>4 GeV/c and pseudorapidities 2.5<η<4.5. The Bc+ mass is directly measured to be 6273.7±1.3(stat)±1.6(syst) MeV/c2, and the measured mass difference with respect to the B+ meson is M(Bc+)-M(B+)=994.6±1.3(stat)±0.6(syst) MeV/c2.

U2 - 10.1103/PhysRevLett.109.232001

DO - 10.1103/PhysRevLett.109.232001

M3 - Article

VL - 109

SP - 232001

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

ER -

Measurements of B+c production and mass with the B+c→J/ψπ+ decay

Abstract

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