Observation of the Ξb- → ψ(2S)Ξ- decay and studies of the Ξb (5945)0 baryon in proton-proton collisions at √s=13 TeV

被引：2

作者：

Hayrapetyan, A. ^{[1
]}

Tumasyan, A. ^{[1
,212
]}

Adam, W. ^{[2
]}

Andrejkovic, J. W. ^{[2
]}

Bergauer, T. ^{[2
]}

Chatterjee, S. ^{[2
,62
]}

Damanakis, K. ^{[2
]}

Dragicevic, M. ^{[2
]}

Hussain, P. S. ^{[2
]}

Jeitler, M. ^{[2
,213
]}

Krammer, N. ^{[2
]}

Li, A. ^{[2
]}

Liko, D. ^{[2
]}

Mikulec, I. ^{[2
]}

Schieck, J. ^{[2
,213
]}

Schofbeck, R. ^{[2
]}

Schwarz, D. ^{[2
]}

Sonawane, M. ^{[2
]}

Templ, S. ^{[2
]}

Waltenberger, W. ^{[2
]}

Wulz, C. -E. ^{[2
,213
]}

Darwish, M. R. ^{[3
,214
]}

Janssen, T. ^{[3
]}

Van Mechelen, P. ^{[3
]}

Bols, E. S. ^{[4
]}

D'Hondt, J. ^{[4
]}

Dansana, S. ^{[4
]}

De Moor, A. ^{[4
]}

Delcourt, M. ^{[4
]}

Lowette, S. ^{[4
]}

Makarenko, I. ^{[4
]}

Mueller, D. ^{[4
]}

Tavernier, S. ^{[4
]}

Tytgat, M. ^{[4
,215
,239
]}

Van Onsem, G. P. ^{[4
]}

Van Putte, S. ^{[4
]}

Vannerom, D. ^{[4
]}

Clerbaux, B. ^{[5
]}

Das, A. K. ^{[5
]}

De Lentdecker, G. ^{[5
]}

Evard, H. ^{[5
]}

Favart, L. ^{[5
]}

Gianneios, P. ^{[5
]}

Hohov, D. ^{[5
]}

Jaramillo, J. ^{[5
]}

Khalilzadeh, A. ^{[5
]}

Khan, F. A. ^{[5
]}

Lee, K. ^{[5
,109
]}

Mahdavikhorrami, M. ^{[5
]}

Malara, A. ^{[5
]}

机构：

[1] Yerevan Phys Inst, Yerevan, Armenia

[2] Inst Hochenergiephys, Vienna, Austria

[3] Univ Antwerp, Antwerp, Belgium

[4] Vrije Univ Brussel, Brussels, Belgium

[5] Univ Libre Bruxelles, Brussels, Belgium

[6] Univ Ghent, Ghent, Belgium

[7] Catholic Univ Louvain, Louvain la Neuve, Belgium

[8] Ctr Brasileiro Pesquisas Fisicas, Rio De Janeiro, Brazil

[9] Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil

[10] Univ Fed ABC, Univ Estadual Paulista, Sao Paulo, Brazil

[11] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria

[12] Univ Sofia, Sofia, Bulgaria

[13] Univ Tarapaca, Inst Alta Invest, Casilla 7 D, Arica, Chile

[14] Beihang Univ, Beijing, Peoples R China

[15] Tsinghua Univ, Dept Phys, Beijing, Peoples R China

[16] Inst High Energy Phys, Beijing, Peoples R China

[17] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing, Peoples R China

[18] Sun Yat Sen Univ, Guangzhou, Peoples R China

[19] Univ Sci & Technol China, Hefei, Peoples R China

[20] Nanjing Normal Univ, Nanjing, Peoples R China

[21] Fudan Univ, Inst Modern Phys, Shanghai, Peoples R China

[22] Fudan Univ, Key Lab Nucl Phys & Ionbeam Applicat MOE, Shanghai, Peoples R China

[23] Zhejiang Univ, Hangzhou, Zhejiang, Peoples R China

[24] Univ Los Andes, Bogota, Colombia

[25] Univ Antioquia, Medellin, Colombia

[26] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, Split, Croatia

[27] Univ Split, Fac Sci, Split, Croatia

[28] Inst Rudjer Boskovic, Zagreb, Croatia

[29] Univ Cyprus, Nicosia, Cyprus

[30] Charles Univ Prague, Prague, Czech Republic

[31] Escuela Politec Nacl, Quito, Ecuador

[32] Univ San Francisco Quito, Quito, Ecuador

[33] Egyptian Network High Energy Phys, Acad Sci Res & Technol Arab Republ Egypt, Cairo, Egypt

[34] Fayoum Univ, Ctr High Energy Phys CHEP FU, Al Fayyum, Egypt

[35] NICPB, Tallinn, Estonia

[36] Univ Helsinki, Dept Phys, Helsinki, Finland

[37] Helsinki Inst Phys, Helsinki, Finland

[38] Lappeenranta Lahti Univ Technol, Lappeenranta, Finland

[39] Univ Paris Saclay, CEA, IRFU, Gif sur Yvette, France

[40] Inst Polytech Paris, Ecole Polytech, CNRS, Lab Leprince Ringuet,IN2P3, Palaiseau, France

[41] Univ Strasbourg, CNRS, IPHC, UMR 7178, Strasbourg, France

[42] Inst Phys 2 Infinis Lyon IP2I, Villeurbanne, France

[43] Georgian Tech Univ, Tbilisi, Georgia

[44] Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany

[45] Rhein Westfal TH Aachen, Phys Inst 3 A, Aachen, Germany

[46] Rhein Westfal TH Aachen, Phys Inst 3 B, Aachen, Germany

[47] Deutsches Elekt Synchrotron, Hamburg, Germany

[48] Univ Hamburg, Hamburg, Germany

[49] Karlsruher Inst Technol, Karlsruhe, Germany

[50] NCSR Demokritos, Inst Nucl & Particle Phys INPP, Aghia Paraskevi, Greece

来源：

PHYSICAL REVIEW C | 2024年 / 110卷 / 01期

关键词：

QED RADIATIVE-CORRECTIONS; UNIVERSAL MONTE-CARLO; HEAVY BARYONS; WEAK DECAYS; PHOTOS; MODEL;

D O I：

10.1103/PhysRevD.110.012002

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The first observation of the decay Xi(-)(b) -> psi(2S)Xi(-) and measurement of the branching ratio of Xi(-)(b) -> psi(2S)Xi(-) to Xi(-)(b) -> J/psi Xi(-) are presented. The J/psi and psi(2S) mesons are reconstructed using their dimuon decay modes. The results are based on proton-proton colliding beam data from the LHC collected by the CMS experiment at root s = 13 TeV in 2016-2018, corresponding to an integrated luminosity of 140 fb(-1). The branching fraction ratio is measured to be B(Xi(-)(b) -> psi(2S)Xi(-))/B(Xi(-)(b) -> J/psi Xi(-)) = 0.84(-0.19)(+0.21)(stat) +/- 0.10(syst) +/- 0.02(B), where the last uncertainty comes from the uncertainties in the branching fractions of the charmonium states. New measurements of the Xi(b) (5945)(0) baryon mass and natural width are also presented, using the Xi(-)(b)pi(+) final state, where the Xi(-)(b) baryon is reconstructed through the decays J/psi Xi(-), psi(2S)Xi(-), J/psi Lambda K-, and J/psi Sigma K-0(-). Finally, the fraction of Xi(-)(b) baryons produced from Xi(b) (5945)(0) decays is determined.

引用

页数：27

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