Data di Pubblicazione:
2022
Abstract:
Based on a sample of (10.09 +/- 0.04 )x10(9) J /psi events collected with the BESIII detector operating at the BEPCII storage ring, a partial wave analysis of the decay J/psi -> gamma eta eta ' is performed. An isoscalar state with exotic quantum numbers J(P) (C)=1(-+), denoted as eta(1)(1855 ), has been observed for the first time with statistical significance larger than 19 sigma . Its mass and width are measured to be (1855 +/- 9(-1)(+6)) MeV /c(2) and (188 +/- 18(-8)(+3)) MeV , respectively. The first uncertainties are statistical and the second are systematic. The product branching fraction B (J /psi -> gamma eta(1)(1855 ))B (eta(1)(1855 )->eta eta ') is measured to be (2.70 +/- 0.41(-0.35)(+0.16))x10(-6) . In addition, an upper limit on the ratio of branching fractions B (f(0)(1710 )->eta eta ')/B (f(0)(1710 )->pi pi) is determined to be 1.61 x10(-3) at 90% confidence level, which lends support to the hypothesis that the f(0)(1710 ) has a large glueball component.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
M. Ablikim; M.???N. Achasov; P. Adlarson; S. Ahmed; M. Albrecht; R. Aliberti; A. Amoroso; M.???R. An; Q. An; X.???H. Bai; Y. Bai; O. Bakina; R. Baldini Ferroli; I. Balossino; Y. Ban; V. Batozskaya; D. Becker; K. Begzsuren; N. Berger; M. Bertani; D. Bettoni; F. Bianchi; J. Bloms; A. Bortone; I. Boyko; R.???A. Briere; H. Cai; X. Cai; A. Calcaterra; G.???F. Cao; N. Cao; S.???A. Cetin; J.???F. Chang; W.???L. Chang; G. Chelkov; C. Chen; G. Chen; H.???S. Chen; M.???L. Chen; S.???J. Chen; T. Chen; X.???R. Chen; X.???T. Chen; Y.???B. Chen; Z.???J. Chen; W.???S. Cheng; G. Cibinetto; F. Cossio; J.???J. Cui; X.???F. Cui; H.???L. Dai; J.???P. Dai; X.???C. Dai; A. Dbeyssi; R.???E. de Boer; D. Dedovich; Z.???Y. Deng; A. Denig; I. Denysenko; M. Destefanis; F. De Mori; Y. Ding; C. Dong; J. Dong; L.???Y. Dong; M.???Y. Dong; X. Dong; S.???X. Du; P. Egorov; Y.???L. Fan; J. Fang; S.???S. Fang; Y. Fang; R. Farinelli; L. Fava; F. Feldbauer; G. Felici; C.???Q. Feng; J.???H. Feng; M. Fritsch; C.???D. Fu; Y. Gao; Y. Gao; I. Garzia; P.???T. Ge; C. Geng; E.???M. Gersabeck; A. Gilman; K. Goetzen; L. Gong; W.???X. Gong; W. Gradl; M. Greco; M.???H. Gu; Y.???T. Gu; C.???Y. Guan; A.???Q. Guo; A.???Q. Guo; L.???B. 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. Heinsius; C.???H. Heinz; Y.???K. Heng; C. Herold; M. Himmelreich; T. Holtmann; G.???Y. Hou; Y.???R. Hou; Z.???L. Hou; H.???M. Hu; J.???F. Hu; T. Hu; Y. Hu; G.???S. Huang; L.???Q. Huang; X.???T. Huang; Y.???P. Huang; Z. Huang; T. Hussain; N. H??sken; W. Ikegami Andersson; W. Imoehl; M. Irshad; S. Jaeger; S. Janchiv; Q. Ji; Q.???P. Ji; X.???B. Ji; X.???L. Ji; Y.???Y. Ji; H.???B. Jiang; S.???S. Jiang; X.???S. Jiang; J.???B. Jiao; Z. Jiao; S. Jin; Y. Jin; M.???Q. Jing; T. Johansson; N. Kalantar-Nayestanaki; X.???S. Kang; R. Kappert; M. Kavatsyuk; B.???C. Ke; I.???K. Keshk; A. Khoukaz; P. Kiese; R. Kiuchi; R. Kliemt; L. Koch; O.???B. Kolcu; B. Kopf; M. Kuemmel; M. Kuessner; A. Kupsc; M.???G. Kurth; W. K??hn; J.???J. Lane; J.???S. Lange; P. Larin; A. Lavania; L. Lavezzi; 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. Li; H.???B. Li; H.???J. Li; H.???N. Li; J.???L. Li; J.???Q. Li; J.???S. Li; Ke Li; L.???J. Li; L.???K. Li; Lei Li; M.???H. Li; P.???R. Li; S.???Y. Li; T. Li; W.???D. Li; W.???G. Li; X.???H. Li; X.???L. Li; Xiaoyu Li; Z.???Y. Li; H. Liang; H. Liang; H. Liang; Y.???F. Liang; Y.???T. Liang; G.???R. Liao; L.???Z. Liao; J. Libby; A. Limphirat; C.???X. Lin; D.???X. Lin; T. Lin; B.???J. Liu; C.???X. Liu; D. Liu; F.???H. Liu; Fang Liu; Feng Liu; G.???M. 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; M.???H. Liu; P.???L. Liu; Q. Liu; S.???B. Liu; T. Liu; T. Liu; W.???M. Liu; X. Liu; Y. Liu; Y.???B. Liu; Z.???A. Liu; Z.???Q. Liu; X.???C. Lou; F.???X. Lu; H.???J. Lu; J.???D. 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; L.???L. Ma; M.???M. Ma; Q.???M. Ma; R.???Q. Ma; R.???T. Ma; X.???X. Ma; X.???Y. Ma; Y. Ma; F.???E. Maas; M. Maggiora; S. Maldaner; 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; H. Muramatsu; S. Nakhoul; Y. Nefedov; F. Nerling; I.???B. Nikolaev; Z. Ning; S. Nisar; S.???L. Olsen; Q. Ouyang; S. Pacetti; X. Pan; Y. Pan; A. Pathak; A. Pathak; P. Patteri; M. Pelizaeus; H.???P. Peng; K. Peters; J. Pettersson; J.???L. Ping; R.???G. Ping; S. Plura; S. Pogodin; R. Poling; V. Prasad; H. Qi; H.???R. Qi; M. Qi; T.???Y. Qi; S. Qian; W.???B. Qian; Z. Qian; C.???F. Qiao; J.???J. Qin; L.???Q. Qin; X.???P. Qin; X.???S. Qin; Z.???H. Qin; J.???F. Qiu; S.???Q. Qu; K.???H. Rashid; K. Ravindran; C.???F. Redmer; K.???J. Ren;
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