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| 題名: | First study of η c(1S), η(1760) and X(1835) production via η ′π +π - final states in two-photon collisions |
| 作者: | 陳鎰鋒;Zhang, C. C.;Aihara, H.;Aushev, T.;Bakich, A. M.;Ban, Y.;Belous, K.;Bischofberger, M.;Browder, T. E.;Chen, A.;Cheon, B. G.;Chilikin, K.;Chistov, R.;Choi, Y.;Dalseno, J.;Danilov, M.;Eidelman, S.;Feindt, M.;Gaur, V.;Gabyshev, N.;Goh, Y. M.;Han, Y. L.;Hayashii, H.;Horii, Y.;Hou, W.-S.;Iijima, T.;Inami, K.;Ishikawa, A.;Iwabuchi, M.;Julius, T.;Kiesling, C.;Kim, H. O.;Kim, M. J.;Kim, Y. J.;Ko, B. R.;Kodyš, P.;Korpar, S.;Krokovny, P.;Kuzmin, A.;Li, J.;Libby, J.;Liu, Y.;Liu, Z. Q.;Louvot, R.;Matvienko, D.;McOnie, S.;Mizuk, R.;Nakano, E.;Nakao, M.;Nakazawa, H.;Natkaniec, Z.;Nishida, S.;Ohshima, T.;Olsen, S. L.;Pakhlov, P.;Pakhlova, G.;Park, H.;Park, H. K.;Pestotnik, R.;Petrič, M.;Piilonen, L. E.;Röhrken, M.;Ryu, S.;Sahoo, H.;Sakai, Y.;Santel, D.;Sanuki, T.;Schneider, O.;Schwanda, C.;Sevior, M. E.;Shapkin, M.;Shebalin, V.;Shen, C. P.;Shibata, T.-A.;Shiu, J.-G.;Shwartz, B.;Smerkol, P.;Sohn, Y.-S.;Solovieva, E.;Stanič, S.;Starič, M.;Sumihama, M.;Sumiyoshi, T.;Tikhomirov, I.;Uchida, M.;Uehara, S.;Uglov, T.;Unno, Y.;Uno, S.;Varner, G.;Vinokurova, A.;Vorobyev, V.;Wang, P.;Wang, X. L.;Watanabe, Y.;Williams, K. M.;Yabsley, B. D.;Yamashita, Y.;Yuan, C. Z.;Zhang, Z. P.;Zhulanov, V. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | ddc:530;info:eu-repo/classification/ddc/530;Physics |
| 日期: | 2012-09-10 |
| 上傳時間: | 2026-04-23 11:56:48 (UTC+8) |
| 出版者: | American Physical Society;American Physical Society (APS) |
| 摘要: | 摘要： The invariant mass spectrum of the eta 'pi(+)pi(-) final state produced in two-photon collisions is obtained using a 673 fb(-1) data sample collected in the vicinity of the Gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We observe a clear signal of the eta(c)(1S) and measure its mass and width to be Md(eta(c)(1S)) = (2982.7 +/- 1.8(stat) +/- 2.2(syst) +/- 0.3(model)) MeV/c(2) and Gamma(eta(c)(1S)) = (37.8(-5.3)(+5.8)(stat) +/- 2.8(syst) +/- 1.4(model)) MeV/c(2). The third error is an uncertainty due to possible interference between the eta(c)(1S) and a nonresonant component. We also report the first evidence for eta(1760) decay to eta'pi(+)pi(-); we find two solutions for its parameters, depending on the inclusion or not of the X(1835), whose existence is of marginal significance in our data. From a fit to the mass spectrum using coherent X(1835) and eta(1760) resonant amplitudes, we set a 90% confidence level upper limit on the product Gamma B-gamma gamma(eta'pi(+)pi(-)) for the X(1835).
出版者： American Physical Society (APS)
出版日期： 2012-09-10
出處： Physical Review D, 2012-09, Vol.86 (5)
識別號： ISSN: 1550-7998
識別號： DOI: 10.1103/physrevd.86.052002 |
| 顯示於類別: | [物理學系] 期刊論文
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