Study of \(K^0_S\) pair production in single-tag two-photon collisions

Study of \(K^0_S\) pair production in single-tag two-photon collisions

We report a measurement of the cross section for \(K^0_S\) pair production in single-tag two-photon collisions, \(\gamma^* \gamma \to K^0_S K^0_S\), for \(Q^2\) up to 30 GeV\(^2\), where \(Q^2\) is the negative of the invariant mass squared of the tagged photon. The measurement covers the kinematic...

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Veröffentlicht in:arXiv.org 2017-12
Hauptverfasser: Watanabe, Y, S Al Said, Asner, D M, Aushev, T, Ayad, R, Babu, V, Bansal, V, Berger, M, Bračko, M, Cheon, B G, Cho, K, Choi, Y, Choudhury, S, Czank, T, Doležal, Z, Dutta, D, Ferber, T, Fulsom, B G, Garg, R, Gelb, M, Goldenzweig, P, Guido, E, Haba, J, W -S Hou, Inami, K, Inguglia, G, Ishikawa, A, Iwasaki, M, Jin, Y, Karyan, G, Kawasaki, T, Kichimi, H, Kiesling, C, Kim, J B, Kodyš, P, Kotchetkov, D, Križan, P, Kroeger, R, Krokovny, P, Lee, I S, Lee, S C, Li, L K, Y Li, L Li Gioi, Libby, J, Liventsev, D, Luo, T, Matsuda, T, Mizuk, R, Moon, H K, Mori, T, Nakao, M, Nakazawa, H, Nath, K J, Niiyama, M, Nisar, N K, Ogawa, S, Ono, H, Onuki, Y, Pakhlov, P, Pakhlova, G, Pal, B, Park, H, Pestotnik, R, Piilonen, L E, Ritter, M, Rostomyan, A, Sakai, Y, Salehi, M, Santelj, L, Sanuki, T, Savinov, V, Schneider, O, Schwanda, C, Seidl, R, Seino, Y, Shen, C P, T -A Shibata, J -G Shiu, Shwartz, B, Sokolov, A, Solovieva, E, Starič, M, Strube, J F, Sumihama, M, Takizawa, M, Teramoto, Y, Uchida, M, Uglov, T, Varner, G, Vinokurova, A, Wang, B, M -Z Wang, Wang, X L, Watanabe, M, H Ye, Yuan, C Z, Yusa, Y, Zhilich, V, Zhulanov, V
Format: Artikel
Sprache:eng
Schlagworte:
Collisions
Form factors
Helicity
Mesons
Pair production
Scattering angle
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Zusammenfassung:We report a measurement of the cross section for \(K^0_S\) pair production in single-tag two-photon collisions, \(\gamma^* \gamma \to K^0_S K^0_S\), for \(Q^2\) up to 30 GeV\(^2\), where \(Q^2\) is the negative of the invariant mass squared of the tagged photon. The measurement covers the kinematic range 1.0 GeV < W < 2.6 GeV and \(|\cos \theta^*| < 1.0\) for the total energy and kaon scattering angle, respectively, in the \(\gamma^* \gamma\) center-of-mass system. These results are based on a data sample of 759 fb\(^{-1}\) collected with the Belle detector at the KEKB asymmetric-energy \(e^+ e^-\) collider. For the first time, the transition form factor of the \(f_2'(1525)\) meson is measured separately for the helicity-0, -1, and -2 components and also compared with theoretical calculations. Finally, the partial decay widths of the \(\chi_{c0}\) and \(\chi_{c2}\) mesons are measured as a function of \(Q^2\).
ISSN:2331-8422
DOI:10.48550/arxiv.1712.02145