Measurement of the CP-violating phase phi(s) in (B)over-bar(s)(0) -> J/psi pi(+)pi(-) decays

R Aaij; J.F.J. van den Brand; F. Dettori; T.J. Ketel; R. Koopman; R.W. Lambert; H.G. Raven; M. Schiller; Collaboration LHCb

doi:10.1016/j.physletb.2012.06.032

Measurement of the CP-violating phase phi(s) in (B)over-bar(s)(0) -> J/psi pi(+)pi(-) decays

R Aaij, J.F.J. van den Brand, F. Dettori, T.J. Ketel, R. Koopman, R.W. Lambert, H.G. Raven, M. Schiller, Collaboration LHCb

(Astro)-Particles Physics

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Abstract

Measurement of the mixing-induced CP-violating phase Φ<inf>s</inf> in B⁰<inf>s</inf> decays is of prime importance in probing new physics. Here 7421 ± 105 signal events from the dominantly CP-odd final state J/ψπ⁺π^- are selected in 1 fb^-1 of pp collision data collected at √ s = 7 TeV with the LHCb detector. A timedependent fit to the data yields a value of Φ<inf>s</inf> = -0.019^+0.173+0.004 <inf>-0.174-0.003</inf> rad, consistent with the Standard Model expectation. No evidence of direct CP violation is found.

Original language	English
Pages (from-to)	378-386
Journal	Physics Letters B
Volume	713
Issue number	4-5
DOIs	https://doi.org/10.1016/j.physletb.2012.06.032
Publication status	Published - 2012

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@article{412ef0daa8a14c239990ee6c7251eaa2,

title = "Measurement of the CP-violating phase phi(s) in (B)over-bar(s)(0) -> J/psi pi(+)pi(-) decays",

abstract = "Measurement of the mixing-induced CP-violating phase Φs in B0s decays is of prime importance in probing new physics. Here 7421 ± 105 signal events from the dominantly CP-odd final state J/ψπ+π- are selected in 1 fb-1 of pp collision data collected at √ s = 7 TeV with the LHCb detector. A timedependent fit to the data yields a value of Φs = -0.019+0.173+0.004 -0.174-0.003 rad, consistent with the Standard Model expectation. No evidence of direct CP violation is found.",

author = "R Aaij and {van den Brand}, J.F.J. and F. Dettori and T.J. Ketel and R. Koopman and R.W. Lambert and H.G. Raven and M. Schiller and Collaboration LHCb",

year = "2012",

doi = "10.1016/j.physletb.2012.06.032",

language = "English",

volume = "713",

pages = "378--386",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "4-5",

}

TY - JOUR

T1 - Measurement of the CP-violating phase phi(s) in (B)over-bar(s)(0) -> J/psi pi(+)pi(-) decays

AU - Aaij, R

AU - van den Brand, J.F.J.

AU - Dettori, F.

AU - Ketel, T.J.

AU - Koopman, R.

AU - Lambert, R.W.

AU - Raven, H.G.

AU - Schiller, M.

AU - LHCb, Collaboration

PY - 2012

Y1 - 2012

N2 - Measurement of the mixing-induced CP-violating phase Φs in B0s decays is of prime importance in probing new physics. Here 7421 ± 105 signal events from the dominantly CP-odd final state J/ψπ+π- are selected in 1 fb-1 of pp collision data collected at √ s = 7 TeV with the LHCb detector. A timedependent fit to the data yields a value of Φs = -0.019+0.173+0.004 -0.174-0.003 rad, consistent with the Standard Model expectation. No evidence of direct CP violation is found.

AB - Measurement of the mixing-induced CP-violating phase Φs in B0s decays is of prime importance in probing new physics. Here 7421 ± 105 signal events from the dominantly CP-odd final state J/ψπ+π- are selected in 1 fb-1 of pp collision data collected at √ s = 7 TeV with the LHCb detector. A timedependent fit to the data yields a value of Φs = -0.019+0.173+0.004 -0.174-0.003 rad, consistent with the Standard Model expectation. No evidence of direct CP violation is found.

U2 - 10.1016/j.physletb.2012.06.032

DO - 10.1016/j.physletb.2012.06.032

M3 - Article

SN - 0370-2693

VL - 713

SP - 378

EP - 386

JO - Physics Letters B

JF - Physics Letters B

IS - 4-5

ER -

Measurement of the CP-violating phase phi(s) in (B)over-bar(s)(0) -> J/psi pi(+)pi(-) decays

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