/ Experiment-HEP arXiv:0912.5116


DISTO data on K- pp


Maggiora, M. (INFN, Turin) ; Kienle, P. (Munich, Tech. U.) ; Suzuki, K. (Stefan Meyer Inst. Subatomare Phys.) ; Yamazaki, T. (Nishina Ctr., RIKEN) ; Alexeev, M. (INFN, Turin) ; Amoroso, A. (INFN, Turin) ; Balestra, F. (INFN, Turin) ; Bedfer, Y. (SPhN, DAPNIA, Saclay) ; Bertini, R. (SPhN, DAPNIA, Saclay) ; Bland, L.C. (Indiana U., IUCF) ; Brenschede, A. (Giessen U.) ; Brochard, F. (SPhN, DAPNIA, Saclay) ; Bussa, M.P. (INFN, Turin) ; Choi, S. (SPhN, DAPNIA, Saclay) ; Colantoni, M.L. (INFN, Turin) ; Dressler, R. (Forschungszentrum Dresden Rossendorf) ; Dzemidzic, M. (Indiana U., IUCF) ; Faivre, J.Cl. (SPhN, DAPNIA, Saclay) ; Ferrero, L. (INFN, Turin) ; Foryciarz, J. (Cracow, INP) ; Frohlich, I. (Giessen U.) ; Frolov, V. (Dubna, JINR) ; Garfagnini, R. (INFN, Turin) ; Grasso, A. (INFN, Turin) ; Heinz, S. (Darmstadt, GSI) ; Jacobs, W.W. (Indiana U., IUCF) ; Kuhn, W. (Giessen U.) ; Maggiora, A. (INFN, Turin) ; Panzieri, D. (SPhN, DAPNIA, Saclay) ; Sosio, S. (INFN, Turin) ; Pfaff, H.W. (Giessen U.) ; Pontecorvo, G. (Dubna, JINR) ; Popov, A. (Dubna, JINR) ; Ritman, J. (Julich, Forschungszentrum) ; Salabura, P. (Jagiellonian U.) ; Tchalyshev, V. (Dubna, JINR) ; Vigdor, S.E. (Brookhaven)

Published in: Nucl.Phys.
Year: 2010
Vol.: A835
Page No: 43-50
Pages: 8

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.

Keyword(s): K nuclei ; kaon condensation ; super-strong nuclear force ; strange di-baryon

Web-Page: http://inspirebeta.net/record/841294/files/images_DISTO-Dalitz-eff-corr-h.png; http://inspirebeta.net/record/841294/files/images_X_large_angle.png; http://inspirebeta.net/record/841294/files/images_X_small_angle.png; http://inspirebeta.net/record/841294/files/images_ang_corr_a.png; http://inspirebeta.net/record/841294/files/images_ang_corr_b.png; http://inspirebeta.net/record/841294/files/images_distribution_background.png; http://inspirebeta.net/record/841294/files/images_distribution_signal.png; http://inspirebeta.net/record/841294/files/images_pp2KX_3GeV_MX-ABC-a-r_new.png; http://inspirebeta.net/record/841294/files/images_tokai_proc_mm_resol.png

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