Münster 2011 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 12: Hadronenstruktur und -spektroskopie IV

HK 12.9: Talk

Monday, March 21, 2011, 18:45–19:00, HS3

Central diffractive meson production in p+p collisions at √s=7 TeV at the ALICE experiment — •Xianguo Lu — Physikalisches Institut, Universität Heidelberg

The ALICE experiment is one of the four large experiments at the LHC. ALICE collected proton-proton collision data at √s=7 TeV from 30 March to 4 November 2010. In this contribution, our first analysis results of central diffractive meson production with a signature of pseudo-rapidity gaps in the forward regions will be presented. The measurement reconstructs the invariant mass spectrum from events with two pions in the central barrel, and the pseudo-rapidity gap is identified as null activity in the forward detectors. With current statistics, an enhancement of f₀(980) and f₂(1270) in double-gap events is seen.