Measurement of the Ds+ - Ds- production asymmetry in 7 TeV pp collisions
LHCb collaboration: R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva,, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio,, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves Jr, S., Amato, Y. Amhis, J. Anderson, R. B. Appleby
TL;DR
This paper measures the production asymmetry between Ds+ and Ds- mesons in 7 TeV proton-proton collisions at the LHC, providing data to refine models of heavy flavor production.
Contribution
It presents the first measurement of Ds+/- production asymmetry at the LHC, using a novel method to determine detection efficiency differences.
Findings
Measured asymmetry A_P = (-0.33 ± 0.22 ± 0.10)%
Provides constraints on heavy flavour production models
Analyzed data in the rapidity range 2.0 to 4.5 with p_T > 2 GeV
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 Ds+ and Ds- mesons is studied using the \phi\pi(+/-) decay mode in a data sample of 1.0/fb 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 Ds 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.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.