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Title:High-statistics study of $K^0_S K^0_S$ pair production in two-photon collisions
Authors:Uehara, S. (Author)
Bračko, Marko (Author)
Golob, Boštjan (Author)
Klučar, Jure (Author)
Korpar, Samo (Author)
Križan, Peter (Author)
Pestotnik, Rok (Author)
Petrič, Marko (Author)
Starič, Marko (Author)
Šantelj, Luka (Author)
Zupanc, Anže (Author), et al.
Files:.pdf Progress_of_Theoretical_and_Experimental_Physics_2013_Uehara_et_al._High-statistics_study_of_KsubSsup0_pair_production_in_two-photon_col.pdf (2,28 MB)
URL https://academic.oup.com/ptep/article-lookup/doi/10.1093/ptep/ptt097
Work type:Scientific work (r2)
Typology:1.01 - Original Scientific Article
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract: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.
Keywords:C00, C05, C07, C21, quantum chromodynamics, quark model, particle properties, lepton collider experiments, experimental particle physics
Year of publishing:2013
Number of pages:str. 1-45
Numbering:št. 12, Letn. 2013
ISSN on article:2050-3911
COBISS_ID:27459367 Link is opened in a new window
DOI:10.1093/ptep/ptt097 Link is opened in a new window
License:CC BY 4.0
This work is available under this license: Creative Commons Attribution 4.0 International
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Record is a part of a journal

Title:Progress of Theoretical and Experimental Physics
Shortened title:Prog. Theor. Exp. Phys.
Publisher:Oxford University Press
COBISS.SI-ID:2704635 New window

Secondary language

Keywords:C00, C05, C07, C21, kvantna kromodinamika, kvarkovski model, lastnosti delcev, eksperimenti, leptonski trkalnik, eksperimentalna fizika delcev


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