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2012

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

LHCb collaboration, Aaij, R., Beteta, C. Abellan et al.

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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)%.

Measurement of the Ds+ - Ds- production asymmetry in 7 TeV pp collisions · Around

Built on

M. Chaichian and A. Fridman, On a possibility for measuring effects of CP violation at p p pp colliders
1993
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S. Bergmann and Y. Nir, New physics effects in doubly Cabibbo suppressed D D decays
1999
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E. Norrbin and T. Sj o ¨ \ddot{\rm o} strand, Production and hadronization of heavy quarks
2000
Earlier work this paper cites.

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