High-statistics study of K^0_S pair production in two-photon collisions

Abstract

We report a high-statistics measurement of the differential cross section of the process gamma gamma --> 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 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}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 --> K^0_S K^0_S is reported. The detailed behavior of the cross section is updated and compared with QCD-based calculations.

35 pages, 32 figures, 17 tables

References in corpus (26)

• Glueballs, Hybrids, Multiquarks. Experimental facts versus QCD inspired concepts
• Scalar mesons above and below 1 GeV
• Four Sorts of Mesons
• Identification of a Scalar Glueball
• Dalitz analysis of the three-body charmless decays B+=>K+Pi+Pi- and B+=>K+K+K-
• Observation of a charmonium-like enhancement in the gamma gamma --> omega J/psi process
• High statistics study of f_0(980) resonance in gamma gamma --> pi^+ pi^- production
• Study of X(3915) --> J/ψω in two-photon collisions
• High-statistics measurement of neutral-pion pair production in two-photon collisions
• High-statistics measurement of neutral-pion pair production in two-photon collisions
• High-statistics study of ${\boldmath ηπ^0}$ production in two-photon collisions
• High statistics measurement of the cross sections of gamma gamma -> pi^+ pi^- production
• Measurement of the gamma gamma -> pi+ pi- and gamma gamma -> K+ K- processes at energies of 2.4 - 4.1 GeV
• The handbag contribution to gamma gamma to pi pi and K K
• Measurement of K^+K^- production in two-photon collisions in the resonant-mass region
• High-statistics study of neutral-pion pair production in two-photon collisions
• Amplitude Analysis of the Decay B+- -> pi+- pi+- pi-+
• Measurement of CP violating asymmetries in B^0 -> K^+K^- K^0_S decays with a time-dependent Dalitz approach
• K0s K0s Final State in Two-Photon Collisions and Implications for Glueballs
• Measurement of gamma gamma -> p p-bar production at Belle
• Light Scalar Mesons in Photon-Photon Collisions
• A study of gamma gamma -> Ks Ks production at energies of 2.4-4.0GeV at Belle
• gamma+gamma --> pi+pi, K+K : leading term QCD vs handbag model
• Measurement of χ_{c2} Production in Two-Photon Collisions
• The Search for eta(1440) --> K^0_S K^pm π^mp in Two-Photon Fusion at CLEO
• Analysis of the pi^+pi^-pi^+pi^- and pi^+pi^0pi^-pi^0 Final States in Quasi-Real Two-Photon Collisions at LEP

Cited by in corpus (19)

• The Physics of the B Factories
• Comprehensive Amplitude Analysis of $\gamma \gamma \to {\pi }^{+}{\pi }^{-},{\pi }^0{\pi }^0$ and $\overline{K}K$ below 1.5 GeV
• Study of ${\pi }^0$ pair production in single-tag two-photon collisions
• A dispersive estimate of scalar contributions to hadronic light-by-light scattering
• Observation of an alternative ${\chi }_{c0}(2P)$ candidate in $e^{+}{e}^{-}\to J/\psi D\bar{D}$
• Two photon couplings of the lightest isoscalars from BELLE data
• Glueball scattering cross section in lattice SU(2) Yang-Mills theory
• Revisiting Scalar Glueballs
• Radiative Meson and Glueball Decays in the Witten-Sakai-Sugimoto Model
• Study of light tetraquark spectroscopy
• Study of $K_S^0$ pair production in single-tag two-photon collisions
• Pascalutsa-Vanderhaeghen light-by-light sumrule from photon-photon collisions
• Exclusive photon-fusion production of even-spin resonances and exotic QED atoms in high-energy hadron collisions
• Measurement of eta_c(1S), eta_c(2S) and non-resonant eta' pi+ pi- production via two-photon collisions
• Polarizabilities from kaon Compton scattering
• The decay $J/\psi \to \gamma \varphi \varphi$: spin dependence of amplitude and angular distributions of photons with linear polarizations
• Production of a tensor glueball in the reaction $\gamma \gamma \to G_2{\pi }^0$ at large momentum transfer
• Dynamical generation of hadronic resonances
• Two-photon production of $f_0$ and $a_0$ resonances as hadronic molecules composed of two vector mesons