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An improved measurement of direct CP violation parameters in B^+- -> J/psi K^+- and B^+- -> J/psi pi^+- decays

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An improved measurement of direct CP violation parameters in B^+- -> J/psi K^+- and B^+- -> J/psi pi^+- decays. / Collaboration, D0; Bertram, Iain; Borissov, Guennadi; Ross, Anthony; Williams, Mark; Ratoff, Peter; Fox, Harald; Lamont, Iain; Beattie, Michael.

In: Physical review letters, Vol. 110, No. 24, 241801, 12.06.2013.

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@article{4241818b34424902b0112fddb60f84f5,
title = "An improved measurement of direct CP violation parameters in B^+- -> J/psi K^+- and B^+- -> J/psi pi^+- decays",
abstract = "We present a measurement of the direct CP-violating charge asymmetry in B± mesons decaying to J/ψK± and J/ψπ± where J/ψ decays to μ+μ-, using the full run II data set of 10.4  fb-1 of proton-antiproton collisions collected using the D0 detector at the Fermilab Tevatron Collider. A difference in the yield of B- and B+ mesons in these decays is found by fitting to the difference between their reconstructed invariant mass distributions resulting in asymmetries of AJ/ψK=[0.59±0.37]%, which is the most precise measurement to date, and AJ/ψπ=[-4.2±4.5]%. Both measurements are consistent with standard model predictions.",
author = "D0 Collaboration and Iain Bertram and Guennadi Borissov and Anthony Ross and Mark Williams and Peter Ratoff and Harald Fox and Iain Lamont and Michael Beattie",
note = "{\textcopyright} 2013 American Physical Society",
year = "2013",
month = jun
day = "12",
doi = "10.1103/PhysRevLett.110.241801",
language = "English",
volume = "110",
journal = "Physical review letters",
issn = "1079-7114",
publisher = "American Physical Society",
number = "24",

}

RIS

TY - JOUR

T1 - An improved measurement of direct CP violation parameters in B^+- -> J/psi K^+- and B^+- -> J/psi pi^+- decays

AU - Collaboration, D0

AU - Bertram, Iain

AU - Borissov, Guennadi

AU - Ross, Anthony

AU - Williams, Mark

AU - Ratoff, Peter

AU - Fox, Harald

AU - Lamont, Iain

AU - Beattie, Michael

N1 - © 2013 American Physical Society

PY - 2013/6/12

Y1 - 2013/6/12

N2 - We present a measurement of the direct CP-violating charge asymmetry in B± mesons decaying to J/ψK± and J/ψπ± where J/ψ decays to μ+μ-, using the full run II data set of 10.4  fb-1 of proton-antiproton collisions collected using the D0 detector at the Fermilab Tevatron Collider. A difference in the yield of B- and B+ mesons in these decays is found by fitting to the difference between their reconstructed invariant mass distributions resulting in asymmetries of AJ/ψK=[0.59±0.37]%, which is the most precise measurement to date, and AJ/ψπ=[-4.2±4.5]%. Both measurements are consistent with standard model predictions.

AB - We present a measurement of the direct CP-violating charge asymmetry in B± mesons decaying to J/ψK± and J/ψπ± where J/ψ decays to μ+μ-, using the full run II data set of 10.4  fb-1 of proton-antiproton collisions collected using the D0 detector at the Fermilab Tevatron Collider. A difference in the yield of B- and B+ mesons in these decays is found by fitting to the difference between their reconstructed invariant mass distributions resulting in asymmetries of AJ/ψK=[0.59±0.37]%, which is the most precise measurement to date, and AJ/ψπ=[-4.2±4.5]%. Both measurements are consistent with standard model predictions.

UR - http://www.scopus.com/inward/record.url?scp=84879097694&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.110.241801

DO - 10.1103/PhysRevLett.110.241801

M3 - Journal article

VL - 110

JO - Physical review letters

JF - Physical review letters

SN - 1079-7114

IS - 24

M1 - 241801

ER -