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Measurement of the mass and production rate of xi(-)(b)( )baryons

文献类型:期刊论文

AuthorAaij, R.28; Beteta, C. Abellan46; Adeva, B.43; Adinolfi, M.50; Aidala, C. A.84,85; Ajaltouni, Z.6; Akar, S.61; Albicocco, P.19; Albrecht, J.11; Alessio, F.44
SourcePhysical review d
Issued Date2019-03-22
Volume99Issue:5Pages:13
ISSN2470-0010
DOI10.1103/physrevd.99.052006
Corresponding AuthorAaij, r.()
English AbstractThe first measurement of the production rate of xi(-)(b) baryons in pp collisions relative to that of lambda(0 )(b)baryons is reported, using data samples collected by the lhcb experiment, and corresponding to integrated luminosities of 1, 2 and 1.6 fb(-1) at root s = 7, 8 and 13 tev, respectively. in the kinematic region 2 < eta < 6 and p(t) < 20 gev/c, we measure f(xi b-)/f(lambda b0) b(xi(-)(b)-> j/psi xi(-))/b(lambda(0)(b)-> j/psi lambda)= (10.8 +/- 0.9 +/- 0.8) x 10(-2) [root s = 7,8 tev], f(xi b-)/f(lambda b0) b(xi(-)(b)-> j/psi xi(-))/b(lambda(0)(b)-> j/psi lambda) =(13.1 +/- 1.1 +/- 1.0) x 10(-2) [root s = 13 tev], where and f(xi b-) and f(lambda)(b0) the fragmentation fractions of b quarks into xi(-)(b) and lambda(0)(b) baryons, respectively; b represents branching fractions; and the uncertainties are due to statistical and experimental systematic sources. the values of f(xi b-)/f(lambda b0) are obtained by invoking su(3) symmetry in the xi(-)(b)-> j/psi xi(-) and lambda(0)(b)-> j/psi lambda decays. production asymmetries between xi(-)(b) and (xi) over bar (+)(b) baryons are also reported. the mass of the xi(-)(b) baryon is also measured relative to that of the lambda(0)(b) baryon, from which it is found that m(xi(-)(b)) = 5796.70 +/- 0.39 +/- 0.15 +/- 0.17 mev/c(2), where the last uncertainty is due to the precision on the known lambda(0)(b) mass. this result represents the most precise determination of the xi(-)(b) mass.
Funding ProjectCERN ; CAPES (Brazil) ; CNPq (Brazil) ; FAPERJ (Brazil) ; FINEP (Brazil) ; MOST (China) ; NSFC (China) ; CNRS/IN2P3 (France) ; BMBF (Germany) ; DFG (Germany) ; MPG (Germany) ; INFN (Italy) ; NWO (Netherlands) ; MNiSW (Poland) ; NCN (Poland) ; MEN/IFA (Romania) ; MSHE (Russia) ; MinECo (Spain) ; SNSF (Switzerland) ; SER (Switzerland) ; NASU (Ukraine) ; STFC (United Kingdom) ; NSF (USA) ; AvH Foundation (Germany) ; EPLANET (European Union) ; Marie Sklodowska-Curie Actions (European Union) ; ERC (European Union) ; ANR (France) ; Labex P2IO (France) ; Labex OCEVU (France) ; Region Auvergne-Rhone-Alpes (France) ; Key Research Program of Frontier Sciences of CAS (China) ; CAS PIFI (China) ; Thousand Talents Program (China) ; RFBR (Russia) ; RSF (Russia) ; Yandex LLC (Russia) ; GVA (Spain) ; XuntaGal (Spain) ; GENCAT (Spain) ; Royal Society (United Kingdom) ; Leverhulme Trust (United Kingdom) ; Laboratory Directed Research and Development program of LANL (USA)
WOS KeywordDISCARDING 1/N(C) ; PP COLLISIONS ; DECAYS ; BEAUTY ; LAMBDA(0)(B) ; RULE ; TOOL
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
Language英语
PublisherAMER PHYSICAL SOC
WOS IDWOS:000462907300001
Funding OrganizationCERN ; CAPES (Brazil) ; CNPq (Brazil) ; FAPERJ (Brazil) ; FINEP (Brazil) ; MOST (China) ; NSFC (China) ; CNRS/IN2P3 (France) ; BMBF (Germany) ; DFG (Germany) ; MPG (Germany) ; INFN (Italy) ; NWO (Netherlands) ; MNiSW (Poland) ; NCN (Poland) ; MEN/IFA (Romania) ; MSHE (Russia) ; MinECo (Spain) ; SNSF (Switzerland) ; SER (Switzerland) ; NASU (Ukraine) ; STFC (United Kingdom) ; NSF (USA) ; AvH Foundation (Germany) ; EPLANET (European Union) ; Marie Sklodowska-Curie Actions (European Union) ; ERC (European Union) ; ANR (France) ; Labex P2IO (France) ; Labex OCEVU (France) ; Region Auvergne-Rhone-Alpes (France) ; Key Research Program of Frontier Sciences of CAS (China) ; CAS PIFI (China) ; Thousand Talents Program (China) ; RFBR (Russia) ; RSF (Russia) ; Yandex LLC (Russia) ; GVA (Spain) ; XuntaGal (Spain) ; GENCAT (Spain) ; Royal Society (United Kingdom) ; Leverhulme Trust (United Kingdom) ; Laboratory Directed Research and Development program of LANL (USA)
URIhttp://www.irgrid.ac.cn/handle/1471x/2160803
Collection高能物理研究所
Corresponding AuthorAaij, R.
Affiliation1.Ctr Brasileiro Pesquisas Fis, 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.Inst High Energy Phys, Beijing, Peoples R China
5.Univ Savoie Mont Blanc, Univ Grenoble Alpes, CNRS, IN2P3 LAPP, Annecy, France
6.Univ Clermont Auvergne, LPC, IN2P3, CNRS, Clermont Ferrand, France
7.Aix Marseille Univ, CPPM, IN2P3, CNRS, Marseille, France
8.Univ Paris Sud, Univ Paris Saclay, IN2P3, CNRS,LAL, Orsay, France
9.Sorbonne Univ, IN2P3, CNRS, Paris Diderot Sorbonne Paris Cite, Paris, France
10.Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany
Recommended Citation
GB/T 7714
Aaij, R.,Beteta, C. Abellan,Adeva, B.,et al. Measurement of the mass and production rate of xi(-)(b)( )baryons[J]. Physical review d,2019,99(5):13.
APA Aaij, R..,Beteta, C. Abellan.,Adeva, B..,Adinolfi, M..,Aidala, C. A..,...&Zucchelli, S..(2019).Measurement of the mass and production rate of xi(-)(b)( )baryons.Physical review d,99(5),13.
MLA Aaij, R.,et al."Measurement of the mass and production rate of xi(-)(b)( )baryons".Physical review d 99.5(2019):13.

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