Data di Pubblicazione:
2023
Abstract:
The J/psi -> Xi(0)(Xi) over bar (0) process and subsequent decays are investigated using (10087 +/- 44) x 10(6) J/psi events collected at the BESIII experiment. The decay parameters of Xi(0) and (Xi) over bar (0) are simultaneously measured to be alpha(Xi) = -0.3750 +/- 0.0034 +/- 0.0016, (alpha) over bar (Xi) = 0.3790 +/- 0.0034 +/- 0.0021, phi(Xi) = 0.0051 +/- 0.0096 +/- 0.0018 rad, (phi) over bar (Xi) = -0.0053 +/- 0.0097 +/- 0.0019 rad with unprecedented accuracies, where the first and the second uncertainties are statistical and systematic, respectively. The most precise values for CP asymmetry observables of Xi(0) decay are obtained to be A(CP)(Xi) = (-5.4 +/- 6.5 +/- 3.1) x 10(-3) and Delta phi(Xi)(CP) = (-0.1 +/- 6.9 +/- 0.9) x 10(-3) rad. For the first time, the weak and strong phase differences are determined to be xi(P) - xi(S) = (0.0 +/- 1.7 +/- 0.2) x 10(-2) rad and delta(P) - delta(S) = (-1.3 +/- 1.7 +/- 0.4) x 10(-2) rad, which are the most precise results for any weakly decaying baryon. These results will play important roles in the studies of the CP violations and polarizations for the strange, charmed, and beauty baryons.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
M. Ablikim; M.???N. Achasov; P. Adlarson; X.???C. Ai; R. Aliberti; A. Amoroso; M.???R. An; Q. An; Y. Bai; O. Bakina; I. Balossino; Y. Ban; V. Batozskaya; K. Begzsuren; N. Berger; M. Berlowski; M. Bertani; D. Bettoni; F. Bianchi; E. Bianco; A. Bortone; I. Boyko; R.???A. Briere; A. Brueggemann; H. Cai; X. Cai; A. Calcaterra; G.???F. Cao; N. Cao; S.???A. Cetin; J.???F. Chang; T.???T. Chang; W.???L. Chang; G.???R. Che; G. Chelkov; C. Chen; Chao Chen; G. Chen; H.???S. Chen; M.???L. Chen; S.???J. Chen; S.???M. Chen; T. Chen; X.???R. Chen; X.???T. Chen; Y.???B. Chen; Y.???Q. Chen; Z.???J. Chen; W.???S. Cheng; S.???K. Choi; X. Chu; G. Cibinetto; S.???C. Coen; F. Cossio; J.???J. Cui; H.???L. Dai; J.???P. Dai; A. Dbeyssi; R.???E. de Boer; D. Dedovich; Z.???Y. Deng; A. Denig; I. Denysenko; M. Destefanis; F. De Mori; B. Ding; X.???X. Ding; Y. Ding; Y. Ding; J. Dong; L.???Y. Dong; M.???Y. Dong; X. Dong; M.???C. Du; S.???X. Du; Z.???H. Duan; P. Egorov; Y.???L. Fan; J. Fang; S.???S. Fang; W.???X. Fang; Y. Fang; R. Farinelli; L. Fava; F. Feldbauer; G. Felici; C.???Q. Feng; J.???H. Feng; K Fischer; M. Fritsch; C. Fritzsch; C.???D. Fu; J.???L. Fu; Y.???W. Fu; H. Gao; Y.???N. Gao; Yang Gao; S. Garbolino; I. Garzia; P.???T. Ge; Z.???W. Ge; C. Geng; E.???M. Gersabeck; A Gilman; K. Goetzen; L. Gong; W.???X. Gong; W. Gradl; S. Gramigna; M. Greco; M.???H. Gu; Y.???T. Gu; C.???Y Guan; Z.???L. Guan; A.???Q. Guo; L.???B. Guo; M.???J. Guo; R.???P. Guo; Y.???P. Guo; A. Guskov; T.???T. Han; W.???Y. Han; X.???Q. Hao; F.???A. Harris; K.???K. He; K.???L. He; F.???H???H. Heinsius; C.???H. Heinz; Y.???K. Heng; C. Herold; T. Holtmann; P.???C. Hong; G.???Y. Hou; X.???T. Hou; Y.???R. Hou; Z.???L. Hou; H.???M. Hu; J.???F. Hu; T. Hu; Y. Hu; G.???S. Huang; K.???X. Huang; L.???Q. Huang; X.???T. Huang; Y.???P. Huang; T. Hussain; N H??sken; W. Imoehl; M. Irshad; J. Jackson; S. Jaeger; S. Janchiv; J.???H. Jeong; Q. Ji; Q.???P. Ji; X.???B. Ji; X.???L. Ji; Y.???Y. Ji; X.???Q. Jia; Z.???K. Jia; P.???C. Jiang; S.???S. Jiang; T.???J. Jiang; X.???S. Jiang; Y. Jiang; J.???B. Jiao; Z. Jiao; S. Jin; Y. Jin; M.???Q. Jing; T. Johansson; X. K.; S. Kabana; N. Kalantar-Nayestanaki; X.???L. Kang; X.???S. Kang; R. Kappert; M. Kavatsyuk; B.???C. Ke; A. Khoukaz; R. Kiuchi; R. Kliemt; O.???B. Kolcu; B. Kopf; M.???K. Kuessner; A. Kupsc; W. K??hn; J.???J. Lane; P. Larin; A. Lavania; L. Lavezzi; T.???T. Lei; Z.???H. Lei; H. Leithoff; M. Lellmann; T. Lenz; C. Li; C. Li; C.???H. Li; Cheng Li; D.???M. Li; F. Li; G. Li; H. Li; H.???B. Li; H.???J. Li; H.???N. Li; Hui Li; J.???R. Li; J.???S. Li; J.???W. Li; K.???L. Li; Ke Li; L.???J Li; L.???K. Li; Lei Li; M.???H. Li; P.???R. Li; Q.???X. Li; S.???X. Li; T. Li; W.???D. Li; W.???G. Li; X.???H. Li; X.???L. Li; Xiaoyu Li; Y.???G. Li; Z.???J. Li; Z.???X. Li; C. Liang; H. Liang; H. Liang; H. Liang; Y.???F. Liang; Y.???T. Liang; G.???R. Liao; L.???Z. Liao; J. Libby; A. Limphirat; D.???X. Lin; T. Lin; B.???J. Liu; B.???X. Liu; C. Liu; C.???X. Liu; F.???H. Liu; Fang Liu; Feng Liu; G.???M. Liu; H. Liu; H.???B. Liu; H.???M. Liu; Huanhuan Liu; Huihui Liu; J.???B. Liu; J.???L. Liu; J.???Y. Liu; K. Liu; K.???Y. Liu; Ke Liu; L. Liu; L.???C. Liu; Lu Liu; M.???H. Liu; P.???L. Liu; Q. Liu; S.???B. Liu; T. Liu; W.???K. Liu; W.???M. Liu; X. Liu; Y. Liu; Y. Liu; Y.???B. Liu; Z.???A. Liu; Z.???Q. Liu; X.???C. Lou; F.???X. Lu; H.???J. Lu; J.???G. Lu; X.???L. Lu; Y. Lu; Y.???P. Lu; Z.???H. Lu; C.???L. Luo; M.???X. Luo; T. Luo; X.???L. Luo; X.???R. Lyu; Y.???F. Lyu; F.???C. Ma; H.???L. Ma; J.???L. Ma; L.???L. Ma; M.???M. Ma; Q.???M. Ma; R.???Q. Ma; R.???T. Ma; X.???Y. Ma; Y. Ma; Y.???M. Ma; F.???E. Maas; M. Maggiora; S. Malde; Q.???A. Malik; A. Mangoni; Y.???J. Mao; Z.???P. Mao; S. Marcello; Z.???X. Meng; J.???G. Messchendorp; G. Mezzadri; H. Miao; T.???J. Min; R.???E. Mitchell; X.???H. Mo; N.???Yu. Muchnoi; Y. Nefedov; F. Nerling; I.???B. Nikolaev; Z. Ning; S. Nisar; Y. Niu; S.???L. Olsen; Q. Ouyang; S. Pacetti; X. Pan; Y. Pan; A. Pathak; P. Patteri; Y.???P. Pei; M. Peliz
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