Double diffractive cross-section measurement in the forward region at LHC

TOTEM Collaboration: G. Antchev , P. Aspell , I. Atanassov , V. Avati , J. Baechler , V. Berardi , M. Berretti , E. Bossini

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U. Bottigli M. Bozzo E. Br\"ucken A. Buzzo F. S. Cafagna M. G. Catanesi M. Csan\'ad T. Cs\"org\H{o} M. Deile K. Eggert V. Eremin F. Ferro A. Fiergolski F. Garcia S. Giani V. Greco L. Grzanka J. Heino T. Hilden A. Karev J. Ka\v{s}par J. Kopal V. Kundr\'at K. Kurvinen S. Lami G. Latino R. Lauhakangas T. Leszko E. Lippmaa J. Lippmaa M. Lokaj\'i\v{c}ek L. Losurdo M. Lo Vetere F. Lucas Rodr\'iguez M. Macr\'i T. M\"aki A. Mercadante N. Minafra S. Minutoli F. Nemes H. Niewiadomski E. Oliveri F. Oljemark R. Orava M. Oriunno K. \"Osterberg P. Palazzi J. Proch\'azka M. Quinto E. Radermacher E. Radicioni F. Ravotti E. Robutti L. Ropelewski G. Ruggiero H. Saarikko A. Scribano J. Smajek W. Snoeys J. Sziklai C. Taylor N. Turini V. Vacek M. V\'itek J. Welti J. Whitmore P. Wyszkowski

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classification ✦ hep-ex

keywords diffractivecross-sectiondoubleeventsforwardmeasurementregiontotem

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The first double diffractive cross-section measurement in the very forward region has been carried out by the TOTEM experiment at the LHC with center-of-mass energy of sqrt(s)=7 TeV. By utilizing the very forward TOTEM tracking detectors T1 and T2, which extend up to |eta|=6.5, a clean sample of double diffractive pp events was extracted. From these events, we measured the cross-section sigma_DD =(116 +- 25) mub for events where both diffractive systems have 4.7 <|eta|_min < 6.5 .

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Double diffractive cross-section measurement in the forward region at LHC

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