Observation of the Bs0 → X(3872)φ Decay

被引：11

作者：

Sirunyan, A. M. ^{[1
]}

Tumasyan, A. ^{[1
]}

Adam, W. ^{[2
]}

Ambrogi, F. ^{[2
]}

Bergauer, T. ^{[2
]}

Dragicevic, M. ^{[2
]}

Ero, J. ^{[2
]}

Del Valle, A. Escalante ^{[2
]}

Flechl, M. ^{[2
]}

Fruhwirth, R. ^{[2
,217
]}

Jeitler, M. ^{[2
,217
]}

Kratschmer, I ^{[2
]}

Liko, D. ^{[2
]}

Madlener, T. ^{[2
]}

Mikulec, I ^{[2
]}

Rad, N. ^{[2
]}

Schieck, J. ^{[2
,217
]}

Schofbeck, R. ^{[2
]}

Spanring, M. ^{[2
]}

Waltenberger, W. ^{[2
]}

Wulz, C-E ^{[2
,217
]}

Zarucki, M. ^{[2
]}

Drugakov, V ^{[3
]}

Mossolov, V ^{[3
]}

Gonzalez, J. Suarez ^{[3
]}

Darwish, Mr ^{[4
]}

De Wolf, Ea ^{[4
]}

Di Croce, D. ^{[4
]}

Janssen, X. ^{[4
]}

Kello, T. ^{[4
,218
]}

Lelek, A. ^{[4
]}

Pieters, M. ^{[4
]}

Sfar, H. Rejeb ^{[4
]}

Van Haevermaet, H. ^{[4
]}

Van Mechelen, P. ^{[4
]}

Van Putte, S. ^{[4
]}

Van Remortel, N. ^{[4
]}

Blekman, F. ^{[5
]}

Bols, E. S. ^{[5
]}

Chhibra, S. S. ^{[5
]}

D'Hondt, J. ^{[5
]}

De Clercq, J. ^{[5
]}

Lontkovskyi, D. ^{[5
]}

Lowette, S. ^{[5
]}

Marchesini, I ^{[5
]}

Moortgat, S. ^{[5
]}

Python, Q. ^{[5
]}

Tavernier, S. ^{[5
]}

Van Doninck, W. ^{[5
]}

Van Mulders, P. ^{[5
]}

机构：

[1] Yerevan Phys Inst, Yerevan, Armenia

[2] Inst Hochenergiephys, Vienna, Austria

[3] Inst Nucl Problems, Minsk, BELARUS

[4] Univ Antwerp, Antwerp, Belgium

[5] Vrije Univ Brussel, Brussels, Belgium

[6] Univ Libre Bruxelles, Brussels, Belgium

[7] Univ Ghent, Ghent, Belgium

[8] Catholic Univ Louvain, Louvain La Neuve, Belgium

[9] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil

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

[11] Univ Estadual Paulista, Sao Paulo, Brazil

[12] Univ Fed ABC, Sao Paulo, Brazil

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

[14] Univ Sofia, Sofia, Bulgaria

[15] Beihang Univ, Beijing, Peoples R China

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

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

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

[19] Sun Yat Sen Univ, Guangzhou, Guangdong, Peoples R China

[20] Zhejiang Univ, Hangzhou, Peoples R China

[21] Univ Los Andes, Bogota, Colombia

[22] Univ Antioquia, Medellin, Colombia

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

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

[25] Inst Rudjer Boskovic, Zagreb, Croatia

[26] Univ Cyprus, Nicosia, Cyprus

[27] Charles Univ Prague, Prague, Czech Republic

[28] Escuela Politec Nacl, Quito, Ecuador

[29] Univ San Francisco Quito, Quito, Ecuador

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

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

[32] NICPB, Tallinn, Estonia

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

[34] Helsinki Inst Phys, Helsinki, Finland

[35] Lappeenranta Univ Technol, Lappeenranta, Finland

[36] Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France

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

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

[39] Univ Lyon, Inst Phys Nucl Lyon, Univ Claude Bernard Lyon 1, CNRS,IN2P3, Villeurbanne, France

[40] Georgian Tech Univ, Tbilisi, Georgia

[41] Tbilisi State Univ, Tbilisi, Georgia

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

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

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

[45] DESY, Hamburg, Germany

[46] Univ Hamburg, Hamburg, Germany

[47] Karlsruher Inst Technol, Karlsruhe, Germany

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

[49] Natl & Kapodistrian Univ Athens, Athens, Greece

[50] Natl Tech Univ Athens, Athens, Greece

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 125卷 / 15期

基金：

欧盟地平线“2020”; 欧洲研究理事会; 巴西圣保罗研究基金会; 芬兰科学院;

关键词：

QED RADIATIVE-CORRECTIONS; UNIVERSAL MONTE-CARLO; PHOTOS;

D O I：

10.1103/PhysRevLett.125.152001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using a data sample of proton-proton collisions at root s = 13 TeV, corresponding to an integrated luminosity of 140 fb(-1) collected by the CMS experiment in 2016-2018, the B-s(0) -> X(3872)phi decay is observed. Decays into J/psi pi(+)pi(-) and K+K- are used to reconstruct, respectively, the X(3872) and phi. The ratio of the product of branching fractions B[B-s(0) -> X(3872)phi]B[X(3872) -> J/psi pi(+)pi(-)] to the product B[B-s(0) ->psi(2S)phi]B[psi(2S) -> J/psi pi(+)pi(-)] is measured to be [2.21 +/- 0.29(stat) +/- 0.17(syst)]%. The ratio B[B-s(0) -> X(3872)phi]/B[B-0 -> X(3872)K-0] is found to be consistent with one, while the ratio B[B-s(0) -> X(3872)phi]/B[B+-> X(3872)K+] is two times smaller. This suggests a difference in the production dynamics of the X(3872) in B-0 and B(0)s meson decays compared to B+. The reported observation may shed new light on the nature of the X(3872) particle.

引用

页数：18

共 50 条

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