Search for a narrow baryonic resonance decaying to K s 0 p or K s 0 over(p, ̄) in deep inelastic scattering at HERA

A. Aktas,V. Andreev,T. Anthonis,Biljana Antunović, S. J. Aplin, A. Asmone,A. Astvatsatourov,Anton Babaev, S. Backovic, A. Baghdasaryan, P. Baranov,E. Barrelet,W. Bartel, S. Baudrand, S. Baumgartner, J. Becker, Matthew Beckingham, O. Behnke,O. Behrendt, A.S. Belousov,Nicolas Berger,J.C. Bizot, M.-O. Boenig,Vincent Boudry, J. Bracinik,Gerhard Brandt, V. Brisson,Dusan Bruncko,F. W. Büsser, A. Bunyatyan, G. Buschhorn, L. Bystritskaya,A. J. Campbell, F. Cassol-Brunner,Karel Cerny, V. Cerny, V. Chekelian, J. G. Contreras, John A Coughlan,Bradley Cox, G. Cozzika, J. Cvach,J. B. Dainton,W.D. Dau, K. Daum,Y. de Boer, B. Delcourt,M. Del Degan,A. De Roeck,E. A. De Wolf,Cristinel Diaconu,V. Dodonov, A. Dubak,Guenter Eckerlin,V. Efremenko,S. Egli,R. Eichler, F. Eisele, A. Eliseev, E. E. Elsen, S. Essenov, A. Falkewicz, P.J.W. Faulkner,Laurent Favart, A. Fedotov, R. Felst, J. Feltesse, J. Ferencei, L. Finke, M. Fleischer, G. Flucke,A. M. Fomenko, G. Franke, T. Frisson, E. Gabathuler,Erika Garutti, J. Gayler, C. Gerlich, S. Ghazaryan, S. Ginzburgskaya, A. Glazov,I. Glushkov,L. Goerlich, M. Goettlich, N. Gogitidze, S. Gorbounov,Christoph Grab, T. Greenshaw,M. Gregori, B. R. Grell, G. Grindhammer,C. Gwilliam, D. Haidt,L. Hajduk,Magnus Hansson, G. Heinzelmann, R. C. W. Henderson, H. Henschel,G. Herrera

Physics Letters B（2006）

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摘要

A search for a narrow baryonic resonance decaying to K(s)(0)p or K-s(0)(p) over bar is carried out in deep inelastic ep scattering with the H1 detector at HERA. ss Such a resonance could be a strange pentaquark Theta(+), evidence for which has been reported by several experiments. The K(s)(0)p and K-s(0)(p) over bar invariant ss mass distributions presented here do not show any significant peak in the mass range from threshold up to 1.7 GeV. Mass dependent upper limits on sigma(ep -> e Theta X+) x BR(Theta(+) -> K(0)p) are obtained at the 95% confidence level.

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