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arXiv · 0912.5116

DISTO data on Kpp

M. Maggiora·P. Kienle·K. Suzuki·T. Yamazaki·DISTO Collaboration·:·M. Alexeev·A. Amoroso·F. Balestra·Y. Bedfer·R. Bertini·L. C. Bland·A. Brenschede·F. Brochard·M. P. Bussa·S. Choi·M. L. Colantoni·R. Dressler·M. Dzemidzic·J. Cl. Faivre·L. Ferrero·J. Foryciarz·I. Fröhlich·V. Frolov·R. Garfagnini·A. Grasso·S. Heinz·W. W. Jacobs·W. Kühn·A. Maggiora·D. Panzieri·S. Sosio·H. W. Pfaff·G. Pontecorvo·A. Popov·J. Ritman·P. Salabura·V. Tchalyshev·S. E. Vigdor
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Abstract

The data from the DISTO Collaboration on the exclusive pp -> p K+ Lambda production acquired at T_p = 2.85 GeV have been re-analysed in order to search for a deeply bound K- pp (= X) state, to be formed in the binary process pp -> K+ X. The preliminary spectra of the DeltaM_{K+} missing-mass and of the M_{p Lambda} invariant-mass show, for large transverse-momenta of protons and kaons, a distinct broad peak with a mass M_X = 2265 +- 2 MeV/c^2 and a width Gamma_X = 118 +- 8 MeV/c^2.

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M. Maggiora, P. Kienle, K. Suzuki, T. Yamazaki, DISTO Collaboration, :, M. Alexeev, A. Amoroso, F. Balestra, Y. Bedfer, R. Bertini, L. C. Bland, A. Brenschede, F. Brochard, M. P. Bussa, S. Choi, M. L. Colantoni, R. Dressler, M. Dzemidzic, J. Cl. Faivre, L. Ferrero, J. Foryciarz, I. Fröhlich, V. Frolov, R. Garfagnini, A. Grasso, S. Heinz, W. W. Jacobs, W. Kühn, A. Maggiora, D. Panzieri, S. Sosio, H. W. Pfaff, G. Pontecorvo, A. Popov, J. Ritman, P. Salabura, V. Tchalyshev, S. E. Vigdor. 2009-12-28. DISTO data on Kpp. https://doi.org/10.1016/j.nuclphysa.2010.01.173

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