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Title: Measurement of the production fraction times branching fraction $$\boldsymbol{ f(b\to\Lambda_{b})\cdot \mathcal{B}(\Lambda_{b}\to J/\psi \Lambda)}$$

Abstract

The {Lambda}{sub b}(udb) baryon is observed in the decay {Lambda}{sub b} {yields} J/{psi}{Lambda} using 6.1 fb{sup -1} of p{bar p} collisions collected with the D0 detector at {radical}s = 1.96 TeV. The production fraction multiplied by the branching fraction for this decay relative to that for the decay B{sup 0} {yields} J/{psi}K{sub s}{sup 0} is measured to be 0.345 {+-} 0.034 (stat.) {+-} 0.033 (syst.) {+-} 0.003 (PDG). Using the world average value of f(b {yields} B{sup 0}) {center_dot} {Beta}(B{sup 0} {yields} J/{psi}K{sub s}{sup 0}) = (1.74 {+-} 0.08) x 10{sup -5}, they obtain f(b {yields} {Lambda}{sub b}) {center_dot} {Beta}({Lambda}{sub b} {yields} J/{psi}{Lambda}) = (6.01 {+-} 0.60 (stat.) {+-} 0.58 (syst.) {+-} 0.28 (PDG)) x 10{sup -5}. This measurement represents an improvement in precision by about a factor of three with respect to the current world average.

Authors:
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Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1016223
Report Number(s):
FERMILAB-PUB-11-206-E
arXiv eprint number arXiv:1105.0690; TRN: US1103030
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACCURACY; BARYONS; DECAY; PRODUCTION; Experiment-HEP

Citation Formats

Abazov, Victor Mukhamedovich, /Dubna, JINR, Abbott, Braden Keim, /Oklahoma U., Acharya, Bannanje Sripath, /Tata Inst., Adams, Mark Raymond, /Illinois U., Chicago, Adams, Todd, /Florida State U., Alexeev, Guennadi D., /Dubna, JINR, Alkhazov, Georgiy D., /St. Petersburg, INP, Alton, Andrew K., /Michigan U. /Augustana Coll., Sioux Falls, Alverson, George O., /Northeastern U., Alves, Gilvan Augusto, /Rio de Janeiro, CBPF, Ancu, Lucian Stefan, and /Nijmegen U. /Fermilab. Measurement of the production fraction times branching fraction $\boldsymbol{ f(b\to\Lambda_{b})\cdot \mathcal{B}(\Lambda_{b}\to J/\psi \Lambda)}$. United States: N. p., 2011. Web.
Abazov, Victor Mukhamedovich, /Dubna, JINR, Abbott, Braden Keim, /Oklahoma U., Acharya, Bannanje Sripath, /Tata Inst., Adams, Mark Raymond, /Illinois U., Chicago, Adams, Todd, /Florida State U., Alexeev, Guennadi D., /Dubna, JINR, Alkhazov, Georgiy D., /St. Petersburg, INP, Alton, Andrew K., /Michigan U. /Augustana Coll., Sioux Falls, Alverson, George O., /Northeastern U., Alves, Gilvan Augusto, /Rio de Janeiro, CBPF, Ancu, Lucian Stefan, & /Nijmegen U. /Fermilab. Measurement of the production fraction times branching fraction $\boldsymbol{ f(b\to\Lambda_{b})\cdot \mathcal{B}(\Lambda_{b}\to J/\psi \Lambda)}$. United States.
Abazov, Victor Mukhamedovich, /Dubna, JINR, Abbott, Braden Keim, /Oklahoma U., Acharya, Bannanje Sripath, /Tata Inst., Adams, Mark Raymond, /Illinois U., Chicago, Adams, Todd, /Florida State U., Alexeev, Guennadi D., /Dubna, JINR, Alkhazov, Georgiy D., /St. Petersburg, INP, Alton, Andrew K., /Michigan U. /Augustana Coll., Sioux Falls, Alverson, George O., /Northeastern U., Alves, Gilvan Augusto, /Rio de Janeiro, CBPF, Ancu, Lucian Stefan, and /Nijmegen U. /Fermilab. Sun . "Measurement of the production fraction times branching fraction $\boldsymbol{ f(b\to\Lambda_{b})\cdot \mathcal{B}(\Lambda_{b}\to J/\psi \Lambda)}$". United States. https://www.osti.gov/servlets/purl/1016223.
@article{osti_1016223,
title = {Measurement of the production fraction times branching fraction $\boldsymbol{ f(b\to\Lambda_{b})\cdot \mathcal{B}(\Lambda_{b}\to J/\psi \Lambda)}$},
author = {Abazov, Victor Mukhamedovich and /Dubna, JINR and Abbott, Braden Keim and /Oklahoma U. and Acharya, Bannanje Sripath and /Tata Inst. and Adams, Mark Raymond and /Illinois U., Chicago and Adams, Todd and /Florida State U. and Alexeev, Guennadi D. and /Dubna, JINR and Alkhazov, Georgiy D. and /St. Petersburg, INP and Alton, Andrew K. and /Michigan U. /Augustana Coll., Sioux Falls and Alverson, George O. and /Northeastern U. and Alves, Gilvan Augusto and /Rio de Janeiro, CBPF and Ancu, Lucian Stefan and /Nijmegen U. /Fermilab},
abstractNote = {The {Lambda}{sub b}(udb) baryon is observed in the decay {Lambda}{sub b} {yields} J/{psi}{Lambda} using 6.1 fb{sup -1} of p{bar p} collisions collected with the D0 detector at {radical}s = 1.96 TeV. The production fraction multiplied by the branching fraction for this decay relative to that for the decay B{sup 0} {yields} J/{psi}K{sub s}{sup 0} is measured to be 0.345 {+-} 0.034 (stat.) {+-} 0.033 (syst.) {+-} 0.003 (PDG). Using the world average value of f(b {yields} B{sup 0}) {center_dot} {Beta}(B{sup 0} {yields} J/{psi}K{sub s}{sup 0}) = (1.74 {+-} 0.08) x 10{sup -5}, they obtain f(b {yields} {Lambda}{sub b}) {center_dot} {Beta}({Lambda}{sub b} {yields} J/{psi}{Lambda}) = (6.01 {+-} 0.60 (stat.) {+-} 0.58 (syst.) {+-} 0.28 (PDG)) x 10{sup -5}. This measurement represents an improvement in precision by about a factor of three with respect to the current world average.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {5}
}