First measurement of pi(-)e ->pi(-)e gamma pion virtual compton scattering

Ocherashvili, A; Alkhazov, G; Atamantchouk, AG; Balatz, MY; Bondar, NF; Cooper, PS; Dauwe, LJ; Davidenko, GV; Dersch, U; Dolgolenko, AG; Dzyubenko, GB; Edelstein, R; Emediato, L; Endler, AMF; Engelfried, J; Eschrich, I; Escobar, CO; Evdokimov, AV; Filimonov, IS; Garcia, FG; Gaspero, M; Giller, I; Golovtsov, VL; Gouffon, P; Gulmez, E; Kangling, H; Iori, M; Jun, SY; Kaya, M; Kilmer, J; Kim, VT; Kochenda, LM; Konorov, I; Kozhevnikov, AP; Krivshich, AG; Kruger, H; Kubantsev, MA; Kubarovsky, VP; Kulyavtsev, AI; Kuropatkin, NP; Kurshetsov, VF; Kushnirenko, A; Kwan, S; Lach, J; Lamberto, A; Landsberg, LG; Larin, I; Leikin, EM; Yunshan, L; Luksys, M; Lungov, T; Maleev, VP; Mao, D; Mao, CS; Mao, ZL; Mathew, P; Mattson, M; Matveev, V; McCliment, E; Moinester, MA; Molchanov, VV; Morelos, A; Nelson, KD; Nemitkin, AV; Neoustroev, PV; Newsom, C; Nilov, AP; Nurushev, SB; Ocherashvili, A; Onel, Y; Ozel, E; Ozkorucuklu, Suat; Penzo, A; Petrenko, SI; Pogodin, P; Pouh, B; Procario, M; Prutskoi, VA; Ramberg, E; Rappazzo, GF; Razmyslovich, BV; Rud, VI; Russ, J; Schiavon, P; Simon, J; Sitnikov, AI; Skow, D; Smith, VJ; Srivastava, M; Steiner, V; Stepanov, V; Stutte, L; Svoiski, M; Terentyev, NK; Thomas, GP; Uvarov, LN; Vasiliev, AN; Vavilov, DV; Verebryusov, VS; Victorov, VA; Vishnyakov, VE; Vorobyov, AA; Vorwalter, K; You, J; Zhao, WH; Zheng, SC; Zukanovich-Funchal, R

doi:10.1103/physrevc.66.034613

First measurement of pi(-)e ->pi(-)e gamma pion virtual compton scattering

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Ocherashvili A., Alkhazov G., Atamantchouk A., Balatz M., Bondar N., Cooper P., ...More

PHYSICAL REVIEW C, vol.66, no.3, 2002 (SCI-Expanded)

Publication Type: Article / Article
Volume: 66 Issue: 3
Publication Date: 2002
Doi Number: 10.1103/physrevc.66.034613
Journal Name: PHYSICAL REVIEW C
Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
Istanbul University Affiliated: No

Abstract

Pion virtual compton scattering (VCS) via the reaction pi(-)e-->pi(-)egamma was observed in the Fermilab E781 SELEX experiment. SELEX used a 600 GeV/c pi(-) beam incident on target atomic electrons, detecting the incident pi(-) and the final state pi(-), electron and gamma. Theoretical predictions based on chiral perturbation theory are incorporated into a Monte Carlo simulation of the experiment and are compared to the data. The number of reconstructed events (=9) and their distribution with respect to the kinematic variables (for the kinematic region studied) are in reasonable accord with the predictions. The corresponding pi(-) VCS experimental cross section is sigma=38.8+/-13 nb, in agreement with the theoretical expectation of sigma=34.7 nb.