TY - JOUR

T1 - Opportunities for studying C -even resonances at a 3–12 GeV photon collider

AU - Beloborodov, K. I.

AU - Kharlamova, T. A.

AU - Moortgat-Pick, G.

AU - Telnov, V. I.

N1 - This work was supported by RFBR-DFG Grant No 20-52-12056.

PY - 2023/5

Y1 - 2023/5

N2 - Recently, a γγ collider based on the existing 17.5 GeV linac of the European XFEL has been proposed. High-energy photons will be generated by Compton scattering of laser photons with a wavelength of 0.5–1 μm on electrons. Such a photon collider covers the range of invariant masses Wγγ< 12 GeV/c2 . The physics program includes spectroscopy of C -even resonances (c-, b-quarkonia, 4-quark states, glueballs) in various JP states. Variable circular and linear polarizations will help in determining the quantum numbers. In this paper, we present a summary of measured and predicted two-photon widths of various resonances in the mass region 3–12 GeV/c2 and investigate the experimental possibility of observing these heavy two-photon resonances under the conditions of a large multi-hadron background. Registration of all final particles is assumed. The minimum values of Γγγ(W) are obtained at which resonances can be detected at a 5 σ confidence level in 1 year of operation.

AB - Recently, a γγ collider based on the existing 17.5 GeV linac of the European XFEL has been proposed. High-energy photons will be generated by Compton scattering of laser photons with a wavelength of 0.5–1 μm on electrons. Such a photon collider covers the range of invariant masses Wγγ< 12 GeV/c2 . The physics program includes spectroscopy of C -even resonances (c-, b-quarkonia, 4-quark states, glueballs) in various JP states. Variable circular and linear polarizations will help in determining the quantum numbers. In this paper, we present a summary of measured and predicted two-photon widths of various resonances in the mass region 3–12 GeV/c2 and investigate the experimental possibility of observing these heavy two-photon resonances under the conditions of a large multi-hadron background. Registration of all final particles is assumed. The minimum values of Γγγ(W) are obtained at which resonances can be detected at a 5 σ confidence level in 1 year of operation.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85159938766&origin=inward&txGid=cefabcde0db16d1ccb616cabe6103f34

UR - https://www.mendeley.com/catalogue/7c53b4e5-2843-3f05-8f72-73c99e6e7fee/

U2 - 10.1140/epjc/s10052-023-11533-8

DO - 10.1140/epjc/s10052-023-11533-8

M3 - Article

VL - 83

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 5

M1 - 359

ER -