Standard

Measurement of the cross section for e+e- → Λ Λ ¯ and evidence of the decay ψ (3770) → Λ Λ ¯. / The BESIII Collaboration.

в: Physical Review D, Том 104, № 9, L091104, 01.11.2021.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

Harvard

The BESIII Collaboration 2021, 'Measurement of the cross section for e+e- → Λ Λ ¯ and evidence of the decay ψ (3770) → Λ Λ ¯', Physical Review D, Том. 104, № 9, L091104. https://doi.org/10.1103/PhysRevD.104.L091104

APA

The BESIII Collaboration (2021). Measurement of the cross section for e+e- → Λ Λ ¯ and evidence of the decay ψ (3770) → Λ Λ ¯. Physical Review D, 104(9), [L091104]. https://doi.org/10.1103/PhysRevD.104.L091104

Vancouver

The BESIII Collaboration. Measurement of the cross section for e+e- → Λ Λ ¯ and evidence of the decay ψ (3770) → Λ Λ ¯. Physical Review D. 2021 нояб. 1;104(9):L091104. doi: 10.1103/PhysRevD.104.L091104

Author

The BESIII Collaboration. / Measurement of the cross section for e+e- → Λ Λ ¯ and evidence of the decay ψ (3770) → Λ Λ ¯. в: Physical Review D. 2021 ; Том 104, № 9.

BibTeX

@article{a180c4faf9d44f3385f815f3f41f424f,
title = "Measurement of the cross section for e+e- → Λ Λ ¯ and evidence of the decay ψ (3770) → Λ Λ ¯",
abstract = "The Born cross section of the process e+e-→ΛΛ¯ is measured at 33 center-of-mass energies between 3.51 and 4.60 GeV using data corresponding to the total integrated luminosity of 20.0 fb-1 collected with the BESIII detector at the BEPCII collider. Describing the energy dependence of the cross section requires a contribution from the ψ(3770)→ΛΛ¯ decay, which is fitted with a significance of 4.6-4.9σ including the systematic uncertainty. The lower bound on its branching fraction is 2.4×10-6 at the 90% confidence level (C.L.), at least an order of magnitude larger than expected from predictions using a scaling based on observed electronic widths. This result indicates the importance of effects from vector charmonium(like) states when interpreting data in terms of e.g., electromagnetic structure observables. The data do not allow for definite conclusions on the interplay with other vector charmonium(like) states, and we set 90% C.L. upper limits for the products of their electronic widths and the branching fractions.",
author = "{BESIII Collaboration} and M. Ablikim and Achasov, {M. N.} and P. Adlarson and S. Ahmed and M. Albrecht and R. Aliberti and A. Amoroso and An, {M. R.} and Q. An and Bai, {X. H.} and Y. Bai and O. Bakina and {Baldini Ferroli}, R. and I. Balossino and Y. Ban and K. Begzsuren and N. Berger and M. Bertani and D. Bettoni and F. Bianchi and J. Bloms and A. Bortone and I. Boyko and Briere, {R. A.} and H. Cai and X. Cai and A. Calcaterra and Cao, {G. F.} and N. Cao and Cetin, {S. A.} and Chang, {J. F.} and Chang, {W. L.} and G. Chelkov and Chen, {D. Y.} and G. Chen and Chen, {H. S.} and Chen, {M. L.} and Chen, {S. J.} and Chen, {X. R.} and Chen, {Y. B.} and Chen, {Z. J.} and Cheng, {W. S.} and G. Cibinetto and F. Cossio and Cui, {X. F.} and Dai, {H. L.} and Dai, {J. P.} and Dai, {X. C.} and Muchnoi, {N. Yu} and Nikolaev, {I. B.}",
note = "Funding Information: The BESIII collaboration thanks the staff of BEPCII and the IHEP computing center for their strong support. This work is supported in part by National Key Research and Development Program of China under Contracts No. 2020YFA0406400 and No. 2020YFA0406300; National Natural Science Foundation of China (NSFC) under Contracts No. 11625523, No. 11635010, No. 11735014, No. 11822506, No. 11835012, No. 11875115, No. 11905236, No. 11935015, No. 11935016, No. 11935018, No. 11961141012, No. 12022510, No. 12035009, No. 12035013, No. 12047501, No. 12075107, and No. 12061131003; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contracts No. U1732263 and No. U1832207; CAS Key Research Program of Frontier Sciences under Contract No. QYZDJ-SSW-SLH040; Fundamental Research Funds for the Central Universities under Grant No. lzujbky-2021-sp24; 100 Talents Program of CAS; Institute of Nuclear and Particle Physics, Astronomy and Cosmology and Shanghai Key Laboratory for Particle Physics and Cosmology; ERC under Contract No. 758462; European Union Horizon 2020 research and innovation program under Contract No. Marie Sklodowska-Curie Grant Agreement No. 894790; German Research Foundation DFG under Contract No. 443159800, Collaborative Research Center CRC 1044, FOR 2359, FOR 2359, GRK 214; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Science and Technology fund; Olle Engkvist Foundation under Contract No. 200-0605; STFC (United Kingdom); The Knut and Alice Wallenberg Foundation (Sweden) under Contract No. 2016.0157; The Royal Society, U.K., under Contracts No. DH140054 and No. DH160214; The Swedish Research Council; and the U.S. Department of Energy under Contracts No. DE-FG02-05ER41374 and No. DE-SC-0012069. Publisher Copyright: {\textcopyright} 2021 authors. Published by the American Physical Society.",
year = "2021",
month = nov,
day = "1",
doi = "10.1103/PhysRevD.104.L091104",
language = "English",
volume = "104",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "AMER PHYSICAL SOC",
number = "9",

}

RIS

TY - JOUR

T1 - Measurement of the cross section for e+e- → Λ Λ ¯ and evidence of the decay ψ (3770) → Λ Λ ¯

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Adlarson, P.

AU - Ahmed, S.

AU - Albrecht, M.

AU - Aliberti, R.

AU - Amoroso, A.

AU - An, M. R.

AU - An, Q.

AU - Bai, X. H.

AU - Bai, Y.

AU - Bakina, O.

AU - Baldini Ferroli, R.

AU - Balossino, I.

AU - Ban, Y.

AU - Begzsuren, K.

AU - Berger, N.

AU - Bertani, M.

AU - Bettoni, D.

AU - Bianchi, F.

AU - Bloms, J.

AU - Bortone, A.

AU - Boyko, I.

AU - Briere, R. A.

AU - Cai, H.

AU - Cai, X.

AU - Calcaterra, A.

AU - Cao, G. F.

AU - Cao, N.

AU - Cetin, S. A.

AU - Chang, J. F.

AU - Chang, W. L.

AU - Chelkov, G.

AU - Chen, D. Y.

AU - Chen, G.

AU - Chen, H. S.

AU - Chen, M. L.

AU - Chen, S. J.

AU - Chen, X. R.

AU - Chen, Y. B.

AU - Chen, Z. J.

AU - Cheng, W. S.

AU - Cibinetto, G.

AU - Cossio, F.

AU - Cui, X. F.

AU - Dai, H. L.

AU - Dai, J. P.

AU - Dai, X. C.

AU - Muchnoi, N. Yu

AU - Nikolaev, I. B.

N1 - Funding Information: The BESIII collaboration thanks the staff of BEPCII and the IHEP computing center for their strong support. This work is supported in part by National Key Research and Development Program of China under Contracts No. 2020YFA0406400 and No. 2020YFA0406300; National Natural Science Foundation of China (NSFC) under Contracts No. 11625523, No. 11635010, No. 11735014, No. 11822506, No. 11835012, No. 11875115, No. 11905236, No. 11935015, No. 11935016, No. 11935018, No. 11961141012, No. 12022510, No. 12035009, No. 12035013, No. 12047501, No. 12075107, and No. 12061131003; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contracts No. U1732263 and No. U1832207; CAS Key Research Program of Frontier Sciences under Contract No. QYZDJ-SSW-SLH040; Fundamental Research Funds for the Central Universities under Grant No. lzujbky-2021-sp24; 100 Talents Program of CAS; Institute of Nuclear and Particle Physics, Astronomy and Cosmology and Shanghai Key Laboratory for Particle Physics and Cosmology; ERC under Contract No. 758462; European Union Horizon 2020 research and innovation program under Contract No. Marie Sklodowska-Curie Grant Agreement No. 894790; German Research Foundation DFG under Contract No. 443159800, Collaborative Research Center CRC 1044, FOR 2359, FOR 2359, GRK 214; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Science and Technology fund; Olle Engkvist Foundation under Contract No. 200-0605; STFC (United Kingdom); The Knut and Alice Wallenberg Foundation (Sweden) under Contract No. 2016.0157; The Royal Society, U.K., under Contracts No. DH140054 and No. DH160214; The Swedish Research Council; and the U.S. Department of Energy under Contracts No. DE-FG02-05ER41374 and No. DE-SC-0012069. Publisher Copyright: © 2021 authors. Published by the American Physical Society.

PY - 2021/11/1

Y1 - 2021/11/1

N2 - The Born cross section of the process e+e-→ΛΛ¯ is measured at 33 center-of-mass energies between 3.51 and 4.60 GeV using data corresponding to the total integrated luminosity of 20.0 fb-1 collected with the BESIII detector at the BEPCII collider. Describing the energy dependence of the cross section requires a contribution from the ψ(3770)→ΛΛ¯ decay, which is fitted with a significance of 4.6-4.9σ including the systematic uncertainty. The lower bound on its branching fraction is 2.4×10-6 at the 90% confidence level (C.L.), at least an order of magnitude larger than expected from predictions using a scaling based on observed electronic widths. This result indicates the importance of effects from vector charmonium(like) states when interpreting data in terms of e.g., electromagnetic structure observables. The data do not allow for definite conclusions on the interplay with other vector charmonium(like) states, and we set 90% C.L. upper limits for the products of their electronic widths and the branching fractions.

AB - The Born cross section of the process e+e-→ΛΛ¯ is measured at 33 center-of-mass energies between 3.51 and 4.60 GeV using data corresponding to the total integrated luminosity of 20.0 fb-1 collected with the BESIII detector at the BEPCII collider. Describing the energy dependence of the cross section requires a contribution from the ψ(3770)→ΛΛ¯ decay, which is fitted with a significance of 4.6-4.9σ including the systematic uncertainty. The lower bound on its branching fraction is 2.4×10-6 at the 90% confidence level (C.L.), at least an order of magnitude larger than expected from predictions using a scaling based on observed electronic widths. This result indicates the importance of effects from vector charmonium(like) states when interpreting data in terms of e.g., electromagnetic structure observables. The data do not allow for definite conclusions on the interplay with other vector charmonium(like) states, and we set 90% C.L. upper limits for the products of their electronic widths and the branching fractions.

UR - http://www.scopus.com/inward/record.url?scp=85121232881&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/db1c3534-7114-32a0-a521-42f0320baeaa/

U2 - 10.1103/PhysRevD.104.L091104

DO - 10.1103/PhysRevD.104.L091104

M3 - Article

AN - SCOPUS:85121232881

VL - 104

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 9

M1 - L091104

ER -

ID: 35027790