Measurement of the ratio of the production cross sections times branching fractions of Bc± → J/ψπ± and B± → J/ψK± and B(B±c→J/ψπ±π±π∓)/B(B±c→J/ψπ±) in pp collisions at s√=7 TeV

Philip S Baringer; Alice Bean; Michael J Murray; Stephen J Sanders; CMS Collaboration

doi:10.1007/JHEP01(2015)063

$Measurement of the ratio of the production cross sections times branching fractions of Bc± → J/ψπ± and B± → J/ψK± and B(B±c→J/ψπ±π±π∓)/B(B±c→J/ψπ±) in pp collisions at s√=7 TeV$

Journal article

Open access

Peer reviewed

Measurement of the ratio of the production cross sections times branching fractions of Bc± → J/ψπ± and B± → J/ψK± and B(B±c→J/ψπ±π±π∓)/B(B±c→J/ψπ±) in pp collisions at s√=7 TeV

Philip S Baringer, Alice Bean, Michael J Murray, Stephen J Sanders and CMS Collaboration

Journal of high energy physics : JHEP., Vol.2015(1), 63

01/13/2015

DOI: 10.1007/JHEP01(2015)063

Files and links (1)

url

https://doi.org/10.1007/JHEP01(2015)063View

Published (Version of record) Open Access

Abstract

The ratio of the production cross sections times branching fractions (σ(B±c)B(B±c→J/ψπ±))/(σ(B±)B(B±→J/ψK±)) is studied in proton-proton collisions at a center-of-mass energy of 7 TeV with the CMS detector at the LHC. The kinematic region investigated requires Bc± and B± mesons with transverse momentum pT > 15 GeV and rapidity |y| < 1.6. The data sample corresponds to an integrated luminosity of 5.1 fb−1. The ratio is determined to be [0.48±0.05(stat)±0.03(syst)±0.05 (τBc)]%. The Bc± → J/ψπ±π±π∓ decay is also observed in the same data sample. Using a model-independent method developed to measure the efficiency given the presence of resonant behaviour in the three-pion system, the ratio of the branching fractions B(B±c→J/ψπ±π±π∓)/B(B±c→J/ψπ±) is measured to be 2.55±0.80(stat)±0.33(syst)+0.04−0.01(τBc), consistent with the previous LHCb result.

B physics

Branching fraction

Hadron-Hadron Scattering

Details

Title: Subtitle: Measurement of the ratio of the production cross sections times branching fractions of Bc± → J/ψπ± and B± → J/ψK± and B(B±c→J/ψπ±π±π∓)/B(B±c→J/ψπ±) in pp collisions at s√=7 TeV
Creators: Philip S Baringer - University of Kansas
Alice Bean
Michael J Murray
Stephen J Sanders - University of Kansas
CMS Collaboration
Contributors: Yasar Onel (Contributor) - University of Iowa, Physics and Astronomy
Resource Type: Journal article
Publication Details: Journal of high energy physics : JHEP., Vol.2015(1), 63
DOI: 10.1007/JHEP01(2015)063
ISSN: 1126-6708
eISSN: 1029-8479
Publisher: Springer Verlag
Language: English
Date published: 01/13/2015
Academic Unit: Physics and Astronomy
Record Identifier: 9984199704202771

Metrics

15 Record Views

11 Times Cited - Web of Science