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| 題名: | High-statistics study of K0S pair production in two-photon collisions |
| 作者: | 陳鎰鋒;Uehara, S.;Adachi, I.;Aihara, H.;Aulchenko, V.;Aushev, T.;Bakich, A. M.;Bala, A.;Bhardwaj, V.;Bhuyan, B.;Bonvicini, G.;Bracko, M.;Chekelian, V.;Chen, A.;Chen, P.;Cheon, B. G.;Chistov, R.;Chobanova, V.;Dingfelder, J.;Dolezal, Z.;Eidelman, S.;Epifanov, D.;Farhat, H.;Fast, J. E.;Feindt, M.;Ferber, T.;Frey, A.;Gaur, V.;Gabyshev, N.;Gillard, R.;Golob, B.;Hayasaka, K.;Hayashii, H.;Hou, W. -. S.;Hyun, H. J.;Ishikawa, A.;Kang, J. H.;Kawasaki, T.;Kiesling, C.;Kim, D. Y.;Kim, Y. J.;Klucar, J.;Ko, B. R.;Korpar, S.;Kumita, T.;Kwon, Y. -. J.;Li, J.;Li, Y.;Liu, C.;Liu, Z. Q.;Liventsev, D.;Lukin, P.;Matvienko, D.;Miyabayashi, K.;Mizuk, R.;Moll, A.;Mussa, R.;Nagasaka, Y.;Nitoh, O.;Ogawa, S.;Okuno, S.;Park, C. W.;Park, H.;Park, H. K.;Pedlar, T. K.;Pestotnik, R.;Piilonen, L. E.;Rohrken, M.;Sahoo, H.;Saito, T.;Santelj, L.;Sanuki, T.;Savinov, V.;Schwanda, C.;Seidl, R.;Senyo, K.;Seon, O.;Shapkin, M.;Shibata, T. -. A.;Shiu, J. -. G.;Sibidanov, A.;Simon, F.;Sohn, Y. -. S.;Sokolov, A.;Tamponi, U.;Tanida, K.;Teramoto, Y.;Unno, Y.;Van Hulse, C.;Wagner, M. N.;Wang, M. -. Z.;Wang, X. L.;Williams, K. M.;Won, E.;Yamashita, Y.;Yashchenko, S.;Yuan, C. Z.;Yusa, Y.;Zhang, C. C.;Zhang, Z. P.;Zhulanov, V. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | C00 Quantum chromodynamics;C05 Quark model;C07 Particle properties;C21 Lepton collider experiments |
| 日期: | 2013-01-01 |
| 上傳時間: | 2026-04-23 12:01:53 (UTC+8) |
| 出版者: | Oxford University Press;United States: Physical Society of Japan |
| 摘要: | 摘要： We report a high-statistics measurement of the differential cross section of the process $γγ → K^0_S K^0_S$ in the range 1.05 GeV $≤ W ≤$ 4.00 GeV, where $W$ is the center-of-mass energy of the colliding photons, using 972 fb-1 of data collected with the Belle detector at the $KEKB$ asymmetric-energy $e^+ e^-$ collider operated at and near the $Υ$-resonance region. The differential cross section is fitted by parameterized S-, D0-, D2-, G0- and G2-wave amplitudes. In the D2 wave, the $f_2$(1270), $a_2$(1320) and $f^\prime_2$(1525) are dominant and a resonance, the $f_2$(2200), is also present. The $f_0$(1710) and possibly the $f_0$(2500) are seen in the $S$ wave. The mass, total width and product of the two-photon partial decay width and decay branching fraction to the $K\overline{K}$ state $Γ_{γγ}(ΒK\overline{K})$ are extracted for the $f^\prime_2$(1525), $f_0$(1710), $f_2$(2200) and $f_0$(2500). The destructive interference between the $f_2$(1270) and $a_2$(1320) is confirmed by measuring their relative phase. The parameters of the charmonium states $Χ_{c0}$ and $Χ_{c2}$ are updated. Possible contributions from the $Χ_{c0}(2P)$ and $Χ_{c2}(2P)$ states are discussed. A new upper limit for the branching fraction of the $P-$ and $CP-$violating decay channel $η_c → K^0_S K^0_S$ is reported. The detailed behavior of the cross section is updated and compared with $QCD$-based calculations.
出版者： United States: Physical Society of Japan
出版日期： 2013-12-01
出處： Progress of theoretical and experimental physics, 2013-12, Vol.2013 (12)
資源來源： Publicly Available Content Database
識別號： ISSN: 2050-3911
識別號： EISSN: 2050-3911
識別號： DOI: 10.1093/ptep/ptt097 |
| 顯示於類別: | [物理學系] 期刊論文
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