Heavy quark production in 7 TeV centre-of-mass energy pp collisions at the LHC is not necessarily flavour symmetric. The production asymmetry, A(P), between D-s(+) and D-s(-) mesons is studied using the phi pi(+/-) decay mode in a data sample of 1.0 fb(-1) collected with the LHCb detector. The difference between pi(+) and pi(-) detection efficiencies is determined using the ratios of fully reconstructed to partially reconstructed D*(+/-) decays. The overall production asymmetry in the D-s(+/-) rapidity region 2.0 to 4.5 with transverse momentum larger than 2 GeV is measured to be A(P) = (-0.33 +/- 0.22 +/- 0.10)%. This result can constrain models of heavy flavour production. (C) 2012 CERN. Published by Elsevier By. All rights reserved.

Aaij, R., Beteta, C., Adametz, A., Adeva, B., Adinolfi, M., Adrover, C., et al. (2012). Measurement of the D-s(+)-D-s(-) production asymmetry in 7 TeV pp collisions. PHYSICS LETTERS. SECTION B, 713(3), 186-195 [10.1016/j.physletb.2012.06.001].

Measurement of the D-s(+)-D-s(-) production asymmetry in 7 TeV pp collisions

CALVI, MARTA;Martinelli, M;Pessina, G;
2012

Abstract

Heavy quark production in 7 TeV centre-of-mass energy pp collisions at the LHC is not necessarily flavour symmetric. The production asymmetry, A(P), between D-s(+) and D-s(-) mesons is studied using the phi pi(+/-) decay mode in a data sample of 1.0 fb(-1) collected with the LHCb detector. The difference between pi(+) and pi(-) detection efficiencies is determined using the ratios of fully reconstructed to partially reconstructed D*(+/-) decays. The overall production asymmetry in the D-s(+/-) rapidity region 2.0 to 4.5 with transverse momentum larger than 2 GeV is measured to be A(P) = (-0.33 +/- 0.22 +/- 0.10)%. This result can constrain models of heavy flavour production. (C) 2012 CERN. Published by Elsevier By. All rights reserved.
Articolo in rivista - Articolo scientifico
flavor physics; forward physics; charm physics; heavy quark production; experimental results
English
2012
713
3
186
195
none
Aaij, R., Beteta, C., Adametz, A., Adeva, B., Adinolfi, M., Adrover, C., et al. (2012). Measurement of the D-s(+)-D-s(-) production asymmetry in 7 TeV pp collisions. PHYSICS LETTERS. SECTION B, 713(3), 186-195 [10.1016/j.physletb.2012.06.001].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/37374
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