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	Measurement of the mass and production rate of xi(-)(b)( )baryons
	Aaij, 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
刊名	Physical review d
	2019-03-22
卷号	99期号:5页码:13
ISSN号	2470-0010
DOI	10.1103/physrevd.99.052006
通讯作者	Aaij, r.()
英文摘要	The 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.
资助项目	CERN ; 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关键词	DISCARDING 1/N(C) ; PP COLLISIONS ; DECAYS ; BEAUTY ; LAMBDA(0)(B) ; RULE ; TOOL
WOS研究方向	Astronomy & Astrophysics ; Physics
WOS类目	Astronomy & Astrophysics ; Physics, Particles & Fields
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000462907300001
资助机构	CERN ; 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)
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2160803
专题	高能物理研究所
通讯作者	Aaij, R.
作者单位	1.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
推荐引用方式 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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