Measurement of the D+/- production asymmetry in 7 TeV pp collisions

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

doi:10.1016/j.physletb.2012.11.038

Measurement of the D+/- production asymmetry in 7 TeV pp collisions

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

(Astro)-Particles Physics

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

The asymmetry in the production cross-section σ of D^± mesons,AP=σ(D+)-σ(D-)σ(D+)+σ(D-), is measured in bins of pseudorapidity η and transverse momentum p<inf>T</inf> within the acceptance of the LHCb detector. The result is obtained with a sample of D+→KS0π+ decays corresponding to an integrated luminosity of 1.0 fb^-1, collected in pp collisions at a centre of mass energy of 7 TeV at the Large Hadron Collider. When integrated over the kinematic range 2.0<p<inf>T</inf><18.0 GeV/c and 2.20<η<4.75, the production asymmetry is A<inf>P</inf>=(-0.96±0.26±0.18)%. The uncertainties quoted are statistical and systematic, respectively. The result assumes that any direct CP violation in the D+→KS0π+ decay is negligible. No significant dependence on η or p<inf>T</inf> is observed. © 2012 CERN.

Original language	English
Pages (from-to)	902-909
Journal	Physics Letters B
Volume	718
Issue number	3
DOIs	https://doi.org/10.1016/j.physletb.2012.11.038
Publication status	Published - 2013

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LHCb:2012fb

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10.1016/j.physletb.2012.11.038

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@article{a73df804e223440780453057799b80b5,

title = "Measurement of the D+/- production asymmetry in 7 TeV pp collisions",

abstract = "The asymmetry in the production cross-section σ of D± mesons,AP=σ(D+)-σ(D-)σ(D+)+σ(D-), is measured in bins of pseudorapidity η and transverse momentum pT within the acceptance of the LHCb detector. The result is obtained with a sample of D+→KS0π+ decays corresponding to an integrated luminosity of 1.0 fb-1, collected in pp collisions at a centre of mass energy of 7 TeV at the Large Hadron Collider. When integrated over the kinematic range 2.0T<18.0 GeV/c and 2.20<η<4.75, the production asymmetry is AP=(-0.96±0.26±0.18)%. The uncertainties quoted are statistical and systematic, respectively. The result assumes that any direct CP violation in the D+→KS0π+ decay is negligible. No significant dependence on η or pT is observed. {\textcopyright} 2012 CERN.",

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 M.H.M. Merk and H.G. Raven and M. Schiller and S. Tolk and Collaboration LHCb",

note = "LHCb:2012fb",

year = "2013",

doi = "10.1016/j.physletb.2012.11.038",

language = "English",

volume = "718",

pages = "902--909",

journal = "Physics Letters B",

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TY - JOUR

T1 - Measurement of the D+/- production asymmetry in 7 TeV pp collisions

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 - Merk, M.H.M.

AU - Raven, H.G.

AU - Schiller, M.

AU - Tolk, S.

AU - LHCb, Collaboration

N1 - LHCb:2012fb

PY - 2013

Y1 - 2013

N2 - The asymmetry in the production cross-section σ of D± mesons,AP=σ(D+)-σ(D-)σ(D+)+σ(D-), is measured in bins of pseudorapidity η and transverse momentum pT within the acceptance of the LHCb detector. The result is obtained with a sample of D+→KS0π+ decays corresponding to an integrated luminosity of 1.0 fb-1, collected in pp collisions at a centre of mass energy of 7 TeV at the Large Hadron Collider. When integrated over the kinematic range 2.0T<18.0 GeV/c and 2.20<η<4.75, the production asymmetry is AP=(-0.96±0.26±0.18)%. The uncertainties quoted are statistical and systematic, respectively. The result assumes that any direct CP violation in the D+→KS0π+ decay is negligible. No significant dependence on η or pT is observed. © 2012 CERN.

AB - The asymmetry in the production cross-section σ of D± mesons,AP=σ(D+)-σ(D-)σ(D+)+σ(D-), is measured in bins of pseudorapidity η and transverse momentum pT within the acceptance of the LHCb detector. The result is obtained with a sample of D+→KS0π+ decays corresponding to an integrated luminosity of 1.0 fb-1, collected in pp collisions at a centre of mass energy of 7 TeV at the Large Hadron Collider. When integrated over the kinematic range 2.0T<18.0 GeV/c and 2.20<η<4.75, the production asymmetry is AP=(-0.96±0.26±0.18)%. The uncertainties quoted are statistical and systematic, respectively. The result assumes that any direct CP violation in the D+→KS0π+ decay is negligible. No significant dependence on η or pT is observed. © 2012 CERN.

U2 - 10.1016/j.physletb.2012.11.038

DO - 10.1016/j.physletb.2012.11.038

M3 - Article

SN - 0370-2693

VL - 718

SP - 902

EP - 909

JO - Physics Letters B

JF - Physics Letters B

IS - 3

ER -

Measurement of the D+/- production asymmetry in 7 TeV pp collisions

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