First Study of Antihyperon-Nucleon Scattering (Λ)over-barp → (Λ)over-barp and Measurement of Λp → Λp Cross Section

被引：2

作者：

Ablikim, M. ^{[1
]}

Achasov, M. N. ^{[4
,89
]}

Adlarson, P. ^{[82
]}

Afedulidis, O. ^{[3
]}

Ai, X. C. ^{[87
]}

Aliberti, R. ^{[38
]}

Amoroso, A. ^{[78
,79
,81
]}

An, Q. ^{[61
,75
]}

Bai, Y. ^{[60
]}

Bakina, O. ^{[39
]}

Balossino, I ^{[31
]}

Ban, Y. ^{[49
,97
]}

Bao, H-R ^{[67
]}

Batozskaya, V ^{[1
,47
]}

Begzsuren, K. ^{[35
]}

Berger, N. ^{[38
]}

Berlowski, M. ^{[47
]}

Bertani, M. ^{[28
]}

Bettoni, D. ^{[31
]}

Bianchi, F. ^{[78
,79
,81
]}

Bianco, E. ^{[78
,79
,81
]}

Bortone, A. ^{[78
,79
,81
]}

Boyko, I ^{[39
]}

Briere, R. A. ^{[5
]}

Brueggemann, A. ^{[72
]}

Cai, H. ^{[83
]}

Cai, X. ^{[1
,61
]}

Calcaterra, A. ^{[28
]}

Cao, G. F. ^{[1
,67
]}

Cao, N. ^{[1
,67
]}

Cetin, S. A. ^{[65
]}

Chang, J. F. ^{[1
,61
]}

Che, G. R. ^{[46
]}

Chelkov, G. ^{[39
,88
]}

Chen, C. ^{[4
,46
]}

Chen, C. H. ^{[9
]}

Chen, Chao ^{[58
]}

Chen, G. ^{[1
]}

Chen, H. S. ^{[1
,67
]}

Chen, H. Y. ^{[20
]}

Chen, M. L. ^{[1
,61
,67
]}

Chen, S. J. ^{[45
]}

Chen, S. L. ^{[48
]}

Chen, S. M. ^{[64
]}

Chen, T. ^{[1
,67
]}

Chen, X. R. ^{[34
,67
]}

Chen, X. T. ^{[1
,67
]}

Chen, Y. B. ^{[1
,61
]}

Chen, Y. Q. ^{[37
]}

Chen, Z. J. ^{[25
,98
]}

机构：

[1] Inst High Energy Phys, Beijing 100049, Peoples R China

[2] Beihang Univ, Beijing 100191, Peoples R China

[3] Bochum Ruhr Univ, D-44780 Bochum, Germany

[4] RAS, SB, Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[5] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[6] Cent China Normal Univ, Wuhan 430079, Peoples R China

[7] Cent South Univ, Changsha 410083, Peoples R China

[8] China Ctr Adv Sci & Technol, Beijing 100190, Peoples R China

[9] China Univ Geosci, Wuhan 430074, Peoples R China

[10] Chung Ang Univ, Seoul 06974, South Korea

[11] COMSATS Univ Islamabad, Lahore Campus,Def Rd,Off Raiwind Rd, Lahore 54000, Pakistan

[12] Fudan Univ, Shanghai 200433, Peoples R China

[13] GSI Helmholtzctr Heavy Ion Res GmbH, D-64291 Darmstadt, Germany

[14] Guangxi Normal Univ, Guilin 541004, Peoples R China

[15] Guangxi Univ, Nanning 530004, Peoples R China

[16] Hangzhou Normal Univ, Hangzhou 310036, Peoples R China

[17] Hebei Univ, Baoding 071002, Peoples R China

[18] Helmholtz Inst Mainz, Staudinger Weg 18, D-55099 Mainz, Germany

[19] Henan Normal Univ, Xinxiang 453007, Peoples R China

[20] Henan Univ, Kaifeng 475004, Peoples R China

[21] Henan Univ Sci & Technol, Luoyang 471003, Peoples R China

[22] Henan Univ Technol, Zhengzhou 450001, Peoples R China

[23] Huangshan Coll, Huangshan 245000, Peoples R China

[24] Hunan Normal Univ, Changsha 410081, Peoples R China

[25] Hunan Univ, Changsha 410082, Hunan, Peoples R China

[26] Indian Inst Technol Madras, Chennai 600036, India

[27] Indiana Univ, Bloomington, IN 47405 USA

[28] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[29] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-06100 Perugia, Italy

[30] Univ Perugia, Lab Nazl Frascati, Ist Nazl Fis Nucl, I-06100 Perugia, Italy

[31] Ist Nazl Fis Nucl, Sez Ferrara, I-44122 Ferrara, Italy

[32] Univ Ferrara, Sez Ferrara, Ist Nazl Fis Nucl, I-44122 Ferrara, Italy

[33] Inner Mongolia Univ, Hohhot 010021, Peoples R China

[34] Inst Modern Phys, Lanzhou 730000, Peoples R China

[35] Inst Phys & Technol, Peace Ave 54B, Ulaanbaatar 13330, Mongolia

[36] Univ Tarapaca, Inst Alta Invest, Casilla 7D, Arica 1000000, Chile

[37] Jilin Univ, Changchun 130012, Peoples R China

[38] Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany

[39] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia

[40] Justus Liebig Univ Giessen, Inst Phys 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany

[41] Lanzhou Univ, Lanzhou 730000, Peoples R China

[42] Liaoning Normal Univ, Dalian 116029, Peoples R China

[43] Liaoning Univ, Shenyang 110036, Peoples R China

[44] Nanjing Normal Univ, Nanjing 210023, Peoples R China

[45] Nanjing Univ, Nanjing 210093, Peoples R China

[46] Nankai Univ, Tianjin 300071, Peoples R China

[47] Natl Ctr Nucl Res, PL-02093 Warsaw, Poland

[48] North China Elect Power Univ, Beijing 102206, Peoples R China

[49] Peking Univ, Beijing 100871, Peoples R China

[50] Qufu Normal Univ, Qufu 273165, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2024年 / 132卷 / 23期

基金：

瑞典研究理事会; 新加坡国家研究基金会;

关键词：

PROTON ELASTIC-SCATTERING; HYPERONS; PHYSICS; AP;

D O I：

10.1103/PhysRevLett.132.231902

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using (10.087 +/- 0.044) x 10(9) J/psi events collected with the BESIII detector at the BEPCII storage ring, the processes Lambda p -> Lambda p and (Lambda) over barp -> (Lambda) over barp are studied, where the Lambda/(Lambda) over bar baryons are produced in the process J/psi -> Lambda(Lambda) over bar and the protons are the hydrogen nuclei in the cooling oil of the beam pipe. Clear signals are observed for the two reactions. The cross sections in -0.9 <= cos theta(Lambda/(Lambda) over bar) <= 0.9 are measured to be sigma(Lambda p -> Lambda p) = (12.2 +/- 1.6(stat) +/- 1.1(syst)) and sigma((Lambda) over barp -> (Lambda) over barp) = (17.5 +/- 2.1(stat) +/- 1.6(syst)) mb at the Lambda/(Lambda) over bar momentum of 1.074 GeV/c within a range of +/- 0.017 GeV/c, where the theta(Lambda/(Lambda) over bar) are the scattering angles of the Lambda/(Lambda) over bar in the Lambda p/(Lambda) over barp rest frames. Furthermore, the differential cross sections of the two reactions are also measured, where there is a slight tendency of forward scattering for Lambda p -> Lambda p, and a strong forward peak for (Lambda) over barp -> (Lambda) over barp. We present an approach to extract the total elastic cross sections by extrapolation. The study of (Lambda) over barp -> (Lambda) over barp represents the first study of antihyperon-nucleon scattering, and these new measurements will serve as important inputs for the theoretical understanding of the (anti)hyperon-nucleon interaction.

引用

页数：10

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