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Back, J. J.; Craik, Daniel; Dossett, D.; Gershon, T. J.; Harrison, P. F.; Kreps, Michal; Latham, Thomas; Pilar, T.; Poluektov, Anton; Reid, Matthew M.; Silva Coutinho, R.; Whitehead, M. (Mark); Williams, M. P.; HASH(0x55942efe94f0) (2012)
Publisher: Elsevier Science BV
Languages: English
Types: Article
Subjects: QC

Classified by OpenAIRE into

arxiv: High Energy Physics::Experiment, High Energy Physics::Phenomenology
Heavy quark production in 7 TeV centre-of-mass energy pp collisions at the LHC is not necessarily flavour symmetric. The production asymmetry, AP, between and mesons is studied using the ϕπ± decay mode in a data sample of 1.0 fb−1 collected with the LHCb detector. The difference between π+ and π− detection efficiencies is determined using the ratios of fully reconstructed to partially reconstructed D⁎± decays. The overall production asymmetry in the rapidity region 2.0 to 4.5 with transverse momentum larger than 2 GeV is measured to be AP=(−0.33±0.22±0.10)%. This result can constrain models of heavy flavour production.
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    • [2] BABAR collaboration, B. Aubert et al., Direct CP, lepton avor and isospin asymmetries in the decays B ! K( )`+` , Phys. Rev. Lett. 102 (2009) 091803 [arXiv:0807.4119] [INSPIRE].
    • [3] BELLE collaboration, J.-T. Wei et al., Measurement of the di erential branching fraction and forward-backword asymmetry for B ! K( )`+` , Phys. Rev. Lett. 103 (2009) 171801 [arXiv:0904.0770] [INSPIRE].
    • [4] Heavy Flavor Averaging Group collaboration, D. Asner et al., Averages of b-hadron, c-hadron and -lepton properties, arXiv:1010.1589 [INSPIRE].
    • [5] LHCb collaboration, A.A. Alves Jr. et al., The LHCb detector at the LHC, 2008 JINST 3 S08005 [INSPIRE].
    • [6] V. Gligorov, C. Thomas and M. Williams, The HLT inclusive B triggers, LHCb-PUB-2011-016 (2011).
    • [7] T. Sjostrand, S. Mrenna and P. Skands, PYTHIA 6:4 physics and manual, JHEP 05 (2006) 026 [hep-ph/0603175] [INSPIRE].
    • [8] I. Belyaev et al., Handling of the generation of primary events in Gauss, the LHCb simulation framework, Nucl. Sci. Cymp. Conf. Rec. (2010) 1155.
    • [9] D.J. Lange, The EvtGen particle decay simulation package, Nucl. Instrum. Meth. A 462 (2001) 152 [INSPIRE].
    • [10] P. Golonka and Z. Was, PHOTOS Monte Carlo: a precision tool for QED corrections in Z and W decays, Eur. Phys. J. C 45 (2006) 97 [hep-ph/0506026] [INSPIRE].
    • [11] A. Ali, P. Ball, L. Handoko and G. Hiller, A comparative study of the decays B ! (K; K )`+` in standard model and supersymmetric theories, Phys. Rev. D 61 (2000) 074024 [hep-ph/9910221] [INSPIRE].
    • [12] GEANT4 collaboration, J. Allison et al., GEANT4 developments and applications, IEEE Trans. Nucl. Sci. 53 (2006) 270.
    • [13] GEANT4 collaboration, S. Agostinelli et al., GEANT4: a simulation toolkit, Nucl. Instrum. Meth. A 506 (2003) 250 [INSPIRE].
    • [14] M. Clemencic et al., The LHCb simulation application, Gauss: design, evolution and experience, J. Phys. Conf. Ser. 331 (2011) 032023.
    • [15] P. Speckmayer, A. Hocker, J. Stelzer and H. Voss, The toolkit for multivariate data analysis TMVA4, J. Phys. Conf. Ser. 219 (2010) 032057.
    • [16] LHCb collaboration, R. Aaij et al., Di erential branching fraction and angular analysis of the decay B0 ! K 0 + , Phys. Rev. Lett. 108 (2012) 181806 [arXiv:1112.3515] [INSPIRE].
    • [17] T. Skwarnicki, A study of the radiative cascade transitions between the 0 and Upsilon resonances, Ph.D. thesis, Institute of Nuclear Physics, Krakow, Poland (1986) [DESY-F31-86-02].
    • [18] P. Koppenburg, Selection of B+ ! llK at LHCb and sensitivity to RK , LHCb-2007-034 (2007).
    • [22] Particle Data Group collaboration, K. Nakamura et al., Review of particle physics, J. Phys. G 37 (2010) 075021 [INSPIRE].
    • [23] C. Bobeth, G. Hiller and D. van Dyk, More bene ts of semileptonic rare B decays at low recoil: CP-violation, JHEP 07 (2011) 067 [arXiv:1105.0376] [INSPIRE].
    • [24] C. Bobeth, G. Hiller, D. van Dyk and C. Wacker, The decay B ! Kl+l at low hadronic recoil and model-independent B = 1 constraints, JHEP 01 (2012) 107 [arXiv:1111.2558] [INSPIRE].
    • [25] C. Bobeth, G. Hiller and D. van Dyk, private communication.
    • [26] M. Beneke, T. Feldmann and D. Seidel, Systematic approach to exclusive B ! V `+` ; V decays, Nucl. Phys. B 612 (2001) 25 [hep-ph/0106067] [INSPIRE].
    • [27] M. Beneke, T. Feldmann and D. Seidel, Exclusive radiative and electroweak b ! d and b ! s penguin decays at NLO, Eur. Phys. J. C 41 (2005) 173 [hep-ph/0412400] [INSPIRE].
    • [28] C. Bobeth, G. Hiller and G. Piranishvili, Angular distributions of B ! Kll decays, JHEP 12 (2007) 040 [arXiv:0709.4174] [INSPIRE].
    • [29] B. Grinstein and D. Pirjol, Exclusive rare B ! K `+` | Decays at low recoil: controlling the long-distance e ects, Phys. Rev. D 70 (2004) 114005 [hep-ph/0404250] [INSPIRE].
    • [30] P. Ball and R. Zwicky, B(D; S) ! ; !; K ; decay form-factors from light-cone sum rules revisited, Phys. Rev. D 71 (2005) 014029 [hep-ph/0412079] [INSPIRE].
    • [31] A. Khodjamirian, T. Mannel, A. Pivovarov and Y.-M. Wang, Charm-loop e ect in B ! K( )`+` and B ! K , JHEP 09 (2010) 089 [arXiv:1006.4945] [INSPIRE].
    • [32] U. Egede, T. Hurth, J. Matias, M. Ramon and W. Reece, New observables in the decay mode Bd ! K 0`+` , JHEP 11 (2008) 032 [arXiv:0807.2589] [INSPIRE].
    • [33] BABAR collaboration, Measurement of branching fractions and rate asymmetries in the rare decays B ! K( )l+l , submitted to Phys. Rev. D [arXiv:1204.3933] [INSPIRE].
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