20.500.12556/DKUM-66976 High-statistics study of $K^0_S K^0_S$ pair production in two-photon collisions We report a high-statistics measurement of the differential cross section of the process $\gamma \gamma \to K^0_S K^0_S$ in the range $1.05\,{\mathrm {GeV}} \leq W \leq 4.00$ , where W is the center-of-mass energy of the colliding photons, using 972 $^{-1}$ of data collected with the Belle detector at the KEKB asymmetric-energy e+e− collider operated at and near the $\Upsilon$-resonance region. The differential cross section is fitted by parameterized S-, $D_0$, $D_2$-, $G_0$-, and $G_2$-wave amplitudes. In the $D_2$ wave, the $f_2$(1270), $a_2$(1320), and $f′_2$(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 $K \bar {K}$ state $\Gamma _{\gamma \gamma }\mathcal {B}(K \bar {K})$ are extracted for the $f′_2$(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 $\chi _{c0}$ and $\chi _{c2}$ are updated. Possible contributions from the $\chi _{c0}(2P)$ and $\chi _{c2}(2P)$ states are discussed. A new upper limit for the branching fraction of the P- and CP-violating decay channel $\eta _c \to K^0_S K^0_S$ is reported. The detailed behavior of the cross section is updated and compared with QCD-based calculations. C00 C05 C07 C21 quantum chromodynamics quark model particle properties lepton collider experiments experimental particle physics C00 C05 C07 C21 kvantna kromodinamika kvarkovski model lastnosti delcev eksperimenti leptonski trkalnik eksperimentalna fizika delcev true false true Angleški jezik Slovenski jezik Znanstveno delo 2017-07-21 12:11:18 2017-07-21 12:13:00 2022-08-01 13:24:30 2019-07-11 16:05:17 2013 0 0 str. 1-45 št. 12 Letn. 2013 2013 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 2050-3911 539.1 2704635 27459367 10.1093/ptep/ptt097 2050-3911 URN:SI:UM:DK:BDHIMT0R Progress_of_Theoretical_and_Experimental_Physics_2013_Uehara_et_al._High-statistics_study_of_KsubSsup0_pair_production_in_two-photon_col.pdf Progress_of_Theoretical_and_Experimental_Physics_2013_Uehara_et_al._High-statistics_study_of_KsubSsup0_pair_production_in_two-photon_col.pdf 1 F5E129A8EDD5F3BE041B71C5D26A3B8D 2920d75931c2ae753c59e83d59fd2f266d397bcfc1f5be0fe6c69cf06230d6da 70826c63-7c0e-11eb-bb7a-00155d0001ca 20.500.12556/dkum/fc918ac5-4b2c-4bb1-95f2-5715f3b53e4e https://dk.um.si/Dokument.php?lang=slv&id=114441 https://academic.oup.com/ptep/article-lookup/doi/10.1093/ptep/ptt097 1 https://dk.um.si/Dokument.php?lang=slv&id=114440 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0