Exclusive production of meson and its measurement in the channel

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• 作者：P. Lebiedowicz^a ; ^{piotr.lebiedowicz@ifj.edu.pl} ; R. Pasechnik^b ; ^{roman.pasechnik@fysast.uu.se} ; A. Szczurek^a ; ^c ; ^{antoni.szczurek@ifj.edu.pl}
• 关键词：¦Öc(0+)&rarr ; ¦Ð+¦Ð&minus ; decay ; diffractive processes ; two-pion continuum
• 刊名：Nuclear Physics B - Proceedings Supplements
• 出版年：2011
• 出版时间：September 2011
• 年：2011
• 卷：219-220
• 期：Complete
• 页码：284-287
• 全文大小：660 K

文摘

We report on the results of a theoretical study of the central exclusive production of scalar meson via decay in high-energy hadron collisions at the RHIC, Tevatron and LHC. The corresponding amplitude for exclusive double-diffractive meson production was obtained within the -factorization approach including virtualities of active gluons and the cross section is calculated with unintegrated gluon distribution functions (UGDFs) known from the literature. The four-body reaction constitutes an irreducible background to the exclusive meson production. We include the absorption effects due to proton-proton interaction and pion-pion rescattering. Several differential distributions for process, including the absorptive corrections, were calculated. The influence of kinematical cuts on the signal-to-background ratio is investigated.