Abstract
We report a measurement of the cross section for KS0 pair production in single-tag two-photon collisions, γ∗γ→KS0KS0, for Q2 up to 30 GeV2, where Q2 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 |cosθ∗|<1.0 for the total energy and kaon scattering angle, respectively, in the γ∗γ 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 f2′(1525) meson is measured separately for the helicity-0, -1, and -2 components and also compared with theoretical calculations. We have derived the cross section for the process for W<2.6 GeV from 121 signal candidate events. Finally, the γ∗γ partial decay widths of the χc0 and χc2 mesons are measured as a function of Q2 based on 10 candidate events in total.
| Original language | English |
|---|---|
| Article number | 052003 |
| Journal | Physical Review D |
| Volume | 97 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2018 Mar 1 |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
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Study of KS0 pair production in single-tag two-photon collisions. / (Belle Collaboration).
In: Physical Review D, Vol. 97, No. 5, 052003, 01.03.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Study of KS0 pair production in single-tag two-photon collisions
AU - (Belle Collaboration)
AU - Masuda, M.
AU - Uehara, S.
AU - Watanabe, Y.
AU - Adachi, I.
AU - Ahn, Jung Keun
AU - Aihara, H.
AU - Al Said, S.
AU - Asner, D. M.
AU - Atmacan, H.
AU - Aulchenko, V.
AU - Aushev, T.
AU - Ayad, R.
AU - Babu, V.
AU - Badhrees, I.
AU - Bansal, V.
AU - Behera, P.
AU - Berger, M.
AU - Bhardwaj, V.
AU - Bhuyan, B.
AU - Biswal, J.
AU - Bondar, A.
AU - Bonvicini, G.
AU - Bozek, A.
AU - Bračko, M.
AU - Červenkov, D.
AU - Chen, A.
AU - Cheon, B. G.
AU - Chilikin, K.
AU - Cho, K.
AU - Choi, Y.
AU - Choudhury, S.
AU - Cinabro, D.
AU - Czank, T.
AU - Dash, N.
AU - Di Carlo, S.
AU - DoleŽal, Z.
AU - Drásal, Z.
AU - Dutta, D.
AU - Eidelman, S.
AU - Epifanov, D.
AU - Fast, J. E.
AU - Ferber, T.
AU - Fulsom, B. G.
AU - Garg, R.
AU - Gaur, V.
AU - Gabyshev, N.
AU - Garmash, A.
AU - Gelb, M.
AU - Giri, A.
AU - Won, Eunil
PY - 2018/3/1
Y1 - 2018/3/1
N2 - We report a measurement of the cross section for KS0 pair production in single-tag two-photon collisions, γ∗γ→KS0KS0, for Q2 up to 30 GeV2, where Q2 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 |cosθ∗|<1.0 for the total energy and kaon scattering angle, respectively, in the γ∗γ 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 f2′(1525) meson is measured separately for the helicity-0, -1, and -2 components and also compared with theoretical calculations. We have derived the cross section for the process for W<2.6 GeV from 121 signal candidate events. Finally, the γ∗γ partial decay widths of the χc0 and χc2 mesons are measured as a function of Q2 based on 10 candidate events in total.
AB - We report a measurement of the cross section for KS0 pair production in single-tag two-photon collisions, γ∗γ→KS0KS0, for Q2 up to 30 GeV2, where Q2 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 |cosθ∗|<1.0 for the total energy and kaon scattering angle, respectively, in the γ∗γ 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 f2′(1525) meson is measured separately for the helicity-0, -1, and -2 components and also compared with theoretical calculations. We have derived the cross section for the process for W<2.6 GeV from 121 signal candidate events. Finally, the γ∗γ partial decay widths of the χc0 and χc2 mesons are measured as a function of Q2 based on 10 candidate events in total.
UR - http://www.scopus.com/inward/record.url?scp=85044846599&partnerID=8YFLogxK
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U2 - 10.1103/PhysRevD.97.052003
DO - 10.1103/PhysRevD.97.052003
M3 - Article
AN - SCOPUS:85044846599
VL - 97
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 5
M1 - 052003
ER -