Observation of Ξ (1530)0 Polarization and Determination of Its Electric and Magnetic Moments in ψ (3686) → Ξ (1530)0 Ξ ¯ (1530)0

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Observation of Ξ (1530)0 Polarization and Determination of Its Electric and Magnetic Moments in ψ (3686) → Ξ (1530)0 Ξ ¯ (1530)0. / BESIII Collaboration ; Ачасов, Михаил Николаевич ; Мучной, Николай Юрьевич et al.

In: Physical Review Letters, Vol. 137, No. 1, 011901, 29.06.2026.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{a8d27800f5814faa924603117da2dd3a,

title = "Observation of Ξ (1530)0 Polarization and Determination of Its Electric and Magnetic Moments in ψ (3686) → Ξ (1530)0 Ξ ¯ (1530)0",

abstract = "Using the data sample of 2.7 × 109 ψ{\dh}3686{\TH} events collected with the BESIII detector at the BEPCII collider, we present an observation of the Ξ{\dh}1530{\TH}0 polarization in the decay ψ{\dh}3686{\TH} → Ξ{\dh}1530{\TH}0Ξ¯{\dh}1530{\TH}0 with a significance larger than 20σ compared with all other tested hypotheses. The helicity amplitudes for the process ψ{\dh}3686{\TH} → Ξ{\dh}1530{\TH}0Ξ¯{\dh}1530{\TH}0 and the moduli of form factors including electric charge, magnetic dipole, electric quadrupole, and magnetic octupole are measured for the first time by performing an angular distribution analysis. Additionally, the polarization correlations between Ξ{\dh}1530{\TH}0 and Ξ¯{\dh}1530{\TH}0 are measured.",

keywords = "Electroweak interaction, Spin polarization, Baryons, Electron sources, Hyperons, Electric moment, Form factors, Magnetic moment",

author = "{BESIII Collaboration} and Ачасов, {Михаил Николаевич} and Мучной, {Николай Юрьевич} and Николаев, {Иван Борисович}",

note = "The BESIII Collaboration thanks the staff of BEPCII (https://cstr.cn/31109.02.BEPC) and the IHEP computing center for their strong support. This work is supported in part by National Key R&D Program of China under Contracts No. 2023YFA1606000 and No. 2023YFA1606704; National Natural Science Foundation of China (NSFC) under Contracts No. 12075107, No. 12247101, No. 12305085, No. 12247121, No. 11635010, No. 11935015, No. 11935016, No. 11935018, No. 12025502, No. 12035009, No. 12035013, No. 12061131003, No. 12192260, No. 12192261, No. 12192262, No. 12192263, No. 12192264, No. 12192265, No. 12221005, No. 12225509, No. 12235017, No. 12342502, and No. 12361141819; the Fundamental Research Funds for the Central Universities No. lzujbky-2025-ytA05, No. lzujbky-2025-it06, No. lzujbky-2024-jdzx06; the Natural Science Foundation of Gansu Province No. 22JR5RA389, No. 25JRRA799; the “111 Center” under Grant No. B20063; National Ten Thousand Talents Program for Top Young Talents, the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; the Strategic Priority Research Program of Chinese Academy of Sciences under Contract No. XDA0480600; CAS under Contract No. YSBR-101; 100 Talents Program of CAS; The Institute of Nuclear and Particle Physics (INPAC) and Shanghai Key Laboratory for Particle Physics and Cosmology; ERC under Contract No. 758462; German Research Foundation DFG under Contract No. FOR5327; Istituto Nazionale di Fisica Nucleare, Italy; Knut and Alice Wallenberg Foundation under Contracts Nos. 2021.0174, No. 2021.0299, and No. 2023.0315; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Research Foundation of Korea under Contract No. NRF-2022R1A2C1092335; National Science and Technology fund of Mongolia; Polish National Science Centre under Contract No. 2024/53/B/ST2/00975; STFC (United Kingdom); Swedish Research Council under Contract No. 2019.04595; U.S. Department of Energy under Contract No. DE-FG02-05ER41374.",

year = "2026",

month = jun,

day = "29",

doi = "10.1103/mbrf-3ly5",

language = "English",

volume = "137",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "1",

}

RIS

TY - JOUR

T1 - Observation of Ξ (1530)0 Polarization and Determination of Its Electric and Magnetic Moments in ψ (3686) → Ξ (1530)0 Ξ ¯ (1530)0

AU - BESIII Collaboration

AU - Ачасов, Михаил Николаевич

AU - Мучной, Николай Юрьевич

AU - Николаев, Иван Борисович

N1 - The BESIII Collaboration thanks the staff of BEPCII (https://cstr.cn/31109.02.BEPC) and the IHEP computing center for their strong support. This work is supported in part by National Key R&D Program of China under Contracts No. 2023YFA1606000 and No. 2023YFA1606704; National Natural Science Foundation of China (NSFC) under Contracts No. 12075107, No. 12247101, No. 12305085, No. 12247121, No. 11635010, No. 11935015, No. 11935016, No. 11935018, No. 12025502, No. 12035009, No. 12035013, No. 12061131003, No. 12192260, No. 12192261, No. 12192262, No. 12192263, No. 12192264, No. 12192265, No. 12221005, No. 12225509, No. 12235017, No. 12342502, and No. 12361141819; the Fundamental Research Funds for the Central Universities No. lzujbky-2025-ytA05, No. lzujbky-2025-it06, No. lzujbky-2024-jdzx06; the Natural Science Foundation of Gansu Province No. 22JR5RA389, No. 25JRRA799; the “111 Center” under Grant No. B20063; National Ten Thousand Talents Program for Top Young Talents, the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; the Strategic Priority Research Program of Chinese Academy of Sciences under Contract No. XDA0480600; CAS under Contract No. YSBR-101; 100 Talents Program of CAS; The Institute of Nuclear and Particle Physics (INPAC) and Shanghai Key Laboratory for Particle Physics and Cosmology; ERC under Contract No. 758462; German Research Foundation DFG under Contract No. FOR5327; Istituto Nazionale di Fisica Nucleare, Italy; Knut and Alice Wallenberg Foundation under Contracts Nos. 2021.0174, No. 2021.0299, and No. 2023.0315; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Research Foundation of Korea under Contract No. NRF-2022R1A2C1092335; National Science and Technology fund of Mongolia; Polish National Science Centre under Contract No. 2024/53/B/ST2/00975; STFC (United Kingdom); Swedish Research Council under Contract No. 2019.04595; U.S. Department of Energy under Contract No. DE-FG02-05ER41374.

PY - 2026/6/29

Y1 - 2026/6/29

N2 - Using the data sample of 2.7 × 109 ψð3686Þ events collected with the BESIII detector at the BEPCII collider, we present an observation of the Ξð1530Þ0 polarization in the decay ψð3686Þ → Ξð1530Þ0Ξ¯ð1530Þ0 with a significance larger than 20σ compared with all other tested hypotheses. The helicity amplitudes for the process ψð3686Þ → Ξð1530Þ0Ξ¯ð1530Þ0 and the moduli of form factors including electric charge, magnetic dipole, electric quadrupole, and magnetic octupole are measured for the first time by performing an angular distribution analysis. Additionally, the polarization correlations between Ξð1530Þ0 and Ξ¯ð1530Þ0 are measured.

AB - Using the data sample of 2.7 × 109 ψð3686Þ events collected with the BESIII detector at the BEPCII collider, we present an observation of the Ξð1530Þ0 polarization in the decay ψð3686Þ → Ξð1530Þ0Ξ¯ð1530Þ0 with a significance larger than 20σ compared with all other tested hypotheses. The helicity amplitudes for the process ψð3686Þ → Ξð1530Þ0Ξ¯ð1530Þ0 and the moduli of form factors including electric charge, magnetic dipole, electric quadrupole, and magnetic octupole are measured for the first time by performing an angular distribution analysis. Additionally, the polarization correlations between Ξð1530Þ0 and Ξ¯ð1530Þ0 are measured.

KW - Electroweak interaction

KW - Spin polarization

KW - Baryons

KW - Electron sources

KW - Hyperons

KW - Electric moment

KW - Form factors

KW - Magnetic moment

UR - https://www.scopus.com/pages/publications/105043814338

U2 - 10.1103/mbrf-3ly5

DO - 10.1103/mbrf-3ly5

M3 - Article

VL - 137

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 1

M1 - 011901

ER -

ID: 80161256