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A measurement of the cp asymmetry difference between lambda(+)(c) -> pk(-)k(+) and p pi(-)pi(+) decays

文献类型:期刊论文

AuthorAaij, R.41; Adeva, B.40; Adinolfi, M.49; Ajaltouni, Z.5; Akar, S.60; Albrecht, J.10; Alessio, F.41; Alexander, M.54; Albero, A. Alfonso39,72; Ali, S.73
SourceJournal of high energy physics
Issued Date2018-03-29
Issue3Pages:21
ISSN1029-8479
KeywordCharm physics Cp violation Flavor physics Hadron-hadron scattering (experiments)
DOI10.1007/jhep03(2018)182
Corresponding AuthorAaij, r.()
English AbstractThe difference between the cp asymmetries in the decays lambda(+)(c) -> pk(-)k(+) and lambda(+)(c) -> p pi(-)pi(+) is presented. proton-proton collision data taken at centre-of-mass energies of 7 and 8 tev collected by the lhcb detector in 2011 and 2012 are used, corresponding to an integrated luminosity of 3 fb(-1). the lambda(+)(c) candidates are reconstructed as part of the lambda(0)(b) -> lambda(+)(c)mu x- decay chain. in order to maximize the cancellation of production and detection asymmetries in the difference, the final-state kinematic distributions of the two samples are aligned by applying phase-space-dependent weights to the lambda(+)(c) -> pk(-)k(+) sample. this alters the definition of the integrated cp asymmetry to a(cp)(wgt)(p pi(-)pi(+)). both samples are corrected for reconstruction and selection efficiencies across the five-dimensional lambda(+)(c) decay phase space. the difference in cp asymmetries is found to be delta a(cp)(wgt) = a(cp)(pk(-)k(+)) - a(cp)(wgt)(p pi(-)pi(+)) = (0.30 +/- 0.91 +/- 0.61) %, where the first uncertainty is statistical and the second is systematic.
WOS KeywordTOOL
WOS Research AreaPhysics
WOS SubjectPhysics, Particles & Fields
Language英语
WOS IDWOS:000430567200002
PublisherSPRINGER
URIhttp://www.irgrid.ac.cn/handle/1471x/2178203
Collection高能物理研究所
Corresponding AuthorAaij, R.
Affiliation1.CBPF, Rio De Janeiro, Brazil
2.Univ Fed Rio de Janeiro, Rio de Janeiro, Brazil
3.Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China
4.Univ Grenoble Alpes, Univ Savoie Mt Blanc, CNRS, IN2P3,LAPP, Annecy, France
5.Clermont Univ, Univ Blaise Pascal, CNRS, IN2P3,LPC, Clermont Ferrand, France
6.Aix Marseille Univ, CNRS, IN2P3, CPPM, Marseille, France
7.Univ Paris Saclay, Univ Paris Sud, CNRS, IN2P3,LAL, Orsay, France
8.Univ Paris 06, Univ Paris Diderot, CNRS, IN2P3,LPNHE, Paris, France
9.Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany
10.Tech Univ Dortmund, Fak Phys, Dortmund, Germany
Recommended Citation
GB/T 7714
Aaij, R.,Adeva, B.,Adinolfi, M.,et al. A measurement of the cp asymmetry difference between lambda(+)(c) -> pk(-)k(+) and p pi(-)pi(+) decays[J]. Journal of high energy physics,2018(3):21.
APA Aaij, R..,Adeva, B..,Adinolfi, M..,Ajaltouni, Z..,Akar, S..,...&Zucchelli, S..(2018).A measurement of the cp asymmetry difference between lambda(+)(c) -> pk(-)k(+) and p pi(-)pi(+) decays.Journal of high energy physics(3),21.
MLA Aaij, R.,et al."A measurement of the cp asymmetry difference between lambda(+)(c) -> pk(-)k(+) and p pi(-)pi(+) decays".Journal of high energy physics .3(2018):21.

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