First Observation of an Attractive Interaction between a Proton and a Cascade Baryon

被引：79

作者：

Acharya, S. ^{[142
]}

Adamova, D. ^{[93
]}

Adhya, S. P. ^{[142
]}

Adler, A. ^{[74
]}

Adolfsson, J. ^{[80
]}

Aggarwal, M. M. ^{[98
]}

Rinella, G. Aglieri ^{[35
]}

Agnello, M. ^{[26
,31
]}

Agrawal, N. ^{[11
,12
]}

Ahammed, Z. ^{[142
]}

Ahmad, S. ^{[19
]}

Ahn, S. U. ^{[76
]}

Aiola, S. ^{[147
]}

Akindinov, A. ^{[64
]}

Al-Turany, M. ^{[105
,106
]}

Alam, S. N. ^{[142
]}

Albuquerque, D. S. D. ^{[123
]}

Aleksandrov, D. ^{[87
]}

Alessandro, B. ^{[33
]}

Alfanda, H. M. ^{[7
]}

Alfaro Molina, R. ^{[72
]}

Ali, B. ^{[19
]}

Ali, Y. ^{[17
]}

Alici, A. ^{[11
,12
,26
,28
,54
]}

Alkin, A. ^{[2
]}

Alme, J. ^{[24
]}

Alt, T. ^{[69
]}

Altenkamper, L. ^{[24
]}

Altsybeev, I ^{[113
]}

Anaam, M. N. ^{[7
]}

Andrei, C. ^{[48
]}

Andreou, D. ^{[35
]}

Andrews, H. A. ^{[110
]}

Andronic, A. ^{[145
]}

Angeletti, M. ^{[35
]}

Anguelov, V ^{[102
]}

Anson, C. ^{[18
]}

Anticic, T. ^{[107
]}

Antinori, F. ^{[57
]}

Antonioli, P. ^{[54
]}

Anwar, R. ^{[127
]}

Apadula, N. ^{[79
]}

Aphecetche, L. ^{[115
]}

Appelshaeuser, H. ^{[69
]}

Arcelli, S. ^{[26
,28
]}

Arnaldi, R. ^{[33
]}

Arratia, M. ^{[79
]}

Arsene, I. C. ^{[23
]}

Arslandok, M. ^{[102
]}

Augustinus, A. ^{[35
]}

机构：

[1] Yerevan Phys Inst Fdn, Alikhanyan Natl Sci Lab, Yerevan, Armenia

[2] Natl Acad Sci Ukraine, Bogolyubov Inst Theoret Phys, Kiev, Ukraine

[3] Bose Inst, Dept Phys, Kolkata, W Bengal, India

[4] Ctr Astroparticle Phys & Space Sci, Kolkata, W Bengal, India

[5] Budker Inst Nucl Phys, Novosibirsk, Russia

[6] Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA USA

[7] Cent China Normal Univ, Wuhan, Hubei, Peoples R China

[8] IN2P3, Ctr Calcul, Villeurbanne, France

[9] Ctr Aplicac Tecnol & Desarrollo Nucl CEADEN, Havana, Cuba

[10] CINVESTAV, Ctr Invest & Estudios Avanzados, Mexico City, DF, Mexico

[11] Museo Stor Fis, Ctr Fermi, Rome, Italy

[12] Ctr Studi & Ric Enrico Fermi, Rome, Italy

[13] Chicago State Univ, Chicago, IL USA

[14] China Inst Atom Energy, Beijing, Peoples R China

[15] Chonbuk Natl Univ, Jeonju, Jeollabuk Do, South Korea

[16] Comenius Univ, Fac Math Phys & Informat, Bratislava, Slovakia

[17] COMSATS Univ Islamabad, Islamabad, Pakistan

[18] Creighton Univ, Omaha, NE 68178 USA

[19] Aligarh Muslim Univ, Dept Phys, Aligarh, Uttar Pradesh, India

[20] Pusan Natl Univ, Dept Phys, Busan, South Korea

[21] Sejong Univ, Dept Phys, Seoul, South Korea

[22] Univ Calif, Dept Phys, Berkeley, CA USA

[23] Univ Oslo, Dept Phys, Oslo, Norway

[24] Univ Bergen, Dept Phys & Technol, Bergen, Norway

[25] Univ Roma La Sapienza, Dipartimento Fis, Rome, Italy

[26] Sezione Ist Nazl Fis Nucl, Rome, Italy

[27] Univ Rome, Dipartimento Fis, Rome, Italy

[28] Univ Rome, Dipartimento Fis & Astron, Rome, Italy

[29] Univ Fisciano, Dipartimento Fis ER Caianiello, Fisciano, Italy

[30] INFN, Grp Collegato, Rome, Italy

[31] Politecn Rome, Dipartimento DISAT, Rome, Italy

[32] Univ Piemonte Orientale, Dipartimento Sci & Innovaz Tecnol, Turin, Italy

[33] INFN, Sez Torino, Turin, Italy

[34] Dipartimento Interateneo Fis M Merlin, Bari, Italy

[35] CERN, European Org Nucl Res, Geneva, Switzerland

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

[37] Western Norway Univ Appl Sci, Fac Engn & Sci, Haugesund, Norway

[38] Czech Tech Univ, Fac Nucl Sci & Phys Engn, Prague, Czech Republic

[39] Safarik Univ, Fac Sci, Kosice, Slovakia

[40] Goethe Univ Frankfurt, Frankfurt Inst Adv Studies, Frankfurt, Germany

[41] Gangneung Wonju Natl Univ, Kangnung, Gangwon Do, South Korea

[42] Gauhati Univ, Dept Phys, Gauhati, Assam, India

[43] Rheinische Friedrich Wilhelms Univ Bonn, Helmholtz Inst Strahlen & Kernphys, Bonn, Germany

[44] Helsinki Inst Phys, Helsinki, Finland

[45] Univ Autonotna Puebla, High Energy Phys Grp, Puebla, Mexico

[46] Hiroshima Univ, Hiroshima, Japan

[47] Hsch Worms, ZTT, Worms, Germany

[48] Horia Hulubei Natl Inst Phys & Nucl Engn, Magurele, Romania

[49] Indian Inst Technol Bombay IIT, Mumbai, Maharashtra, India

[50] Indian Inst Technol Indore, Indore, Madhya Pradesh, India

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 123卷 / 11期

关键词：

BOUND-STATE; COLLISIONS;

D O I：

10.1103/PhysRevLett.123.112002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

This Letter presents the first experimental observation of the attractive strong interaction between a proton and a multistrange baryon (hyperon) Xi(-). The result is extracted from two-particle correlations of combined p-Xi(-) circle plus (p) over bar-(Xi) over bar (+) pairs measured in p-Pb collisions at root S-NN = 5.02 TeV at the LHC with ALICE. The measured correlation function is compared with the prediction obtained assuming only an attractive Coulomb interaction and a standard deviation in the range [3.6, 5.3] is found. Since the measured p-Xi(-)circle plus(p) over bar-(Xi) over bar (+) correlation is significantly enhanced with respect to the Coulomb prediction, the presence of an additional, strong, attractive interaction is evident. The data are compatible with recent lattice calculations by the HAL-QCD Collaboration, with a standard deviation in the range [1.8, 3.7]. The lattice potential predicts a shallow repulsive Xi(-). interaction within pure neutron matter and this implies stiffer equations of state for neutron-rich matter including hyperons. Implications of the strong interaction for the modeling of neutron stars are discussed.

引用

页数：13

共 45 条

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