OBSERVATION OF HIGHLY VIRTUAL PHOTON-PHOTON COLLISIONS TO HADRONS AT TRISTAN

Authors
ENOMOTO R ABE K ABE T ADACHI I ADACHI K AOKI M AOKI M AWA S EMI K FUJII H FUJII K FUJII T FUJIMOTO J FUJITA K FUJIWARA N HAYASHII H HOWELL B IKEDA H ITOH R INOUE Y IWASAKI H IWASAKI M KANEYUKI K KAJIKAWA R KATO S KAWABATA S KICHIMI H KOBAYASHI M KOLTICK D LEVINE I MINAMI S MIYABAYASHI K MIYAMOTO A NAGAI K NAKABAYASHI K NAKANO E NITOH O NOGUCHI S OCHI A OCHIAI F OHISHI N OHNISHI Y SUGIYAMA A SUZUKI S SUZUKI S TAKAHASHI K TAKAHASHI T TANIMORI T TAUCHI T TERAMOTO Y TOOMI N TSUKAMOTO T TSUMURA O UNO S WATANABE T WATANABE Y YAMAGUCHI A YAMAMOTO A YAMAUCHI M
Citation
R. Enomoto et al., OBSERVATION OF HIGHLY VIRTUAL PHOTON-PHOTON COLLISIONS TO HADRONS AT TRISTAN, Physics letters. Section B, 368(4), 1996, pp. 299-303
Citations number
29
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
368
Issue
4
Year of publication
1996
Pages
299 - 303
Database
ISI
SICI code
0370-2693(1996)368:4<299:OOHVPC>2.0.ZU;2-T
Abstract
We have observed highly virtual (Q(2) > 1.05 GeV2) photon-photon colli sions to hadronic final states at root s(e+e-) = 58 GeV. The integrate d luminosity of the data sample was 241 pb(-1). Both scattered beam-el ectrons and scattered beam-positrons were detected using low-angle cal orimeters (i.e., both photons were highly virtual, ''double-tag'');we obtained 115 hadronic events with an estimated background of 10.2 +/- 1.1. The cross section obtained was 4.11 +/- 0.66 pb in the 2 < W-gamm a gamma < 25 GeV and Q(gamma,min)(2) > 2 GeV region, while the lowest order quark-parton model predicted 3.00 pb.