Direct determination of two-pion correlations for pp -> 2 pi(+)2 pi(-) annihilation at rest (Journal article)

Angelopoulos, A./ Apostolakis, A./ Aslanides, E./ Backenstoss, G./ Bargassa, P./ Behnke, O./ Benelli, A./ Bertin, V./ Blanc, F./ Bloch, P./ Carlson, P./ Carroll, M./ Carvalho, J./ Cawley, E./ Charalambous, S./ Chardin, G./ Chertok, M. B./ Cody, A./ Danielsson, M./ Dejardin, M./ Derre, J./ Ealet, A./ Eleftheriadis, C./ Evangelou, I./ Faravel, L./ Ferreira-Marques, R./ Fetscher, W./ Fidecaro, M./ Filipcic, A./ Francis, D./ Fry, J./ Gabathuler, E./ Gamet, R./ Garreta, D./ Gerber, H. J./ Go, A./ Haselden, A./ Hayman, P. J./ Henry-Couannier, F./ Hollander, R. W./ Hubert, E./ Jon-And, K./ Kettle, P. R./ Kokkas, P./ Kreuger, R./ Le Gac, R./ Leimgruber, F./ Liolios, A./ Locher, M. P./ Machado, E./ Mandic, I./ Manthos, N./ Marel, G./ Markushin, V. E./ Mikuz, M./ Miller, J./ Montanet, F./ Muller, A./ Nakada, T./ Pagels, B./ Papadopoulos, I./ Pavlopoulos, P./ da Cunha, J. P./ Policarpo, A./ Polivka, G./ Rickenbach, R./ Roberts, B. L./ Ruf, T./ Sakeliou, L./ Sanders, P./ Schafer, M./ Schaller, L. A./ Schietinger, T./ Schopper, A./ Soares, A./ Tauscher, L./ Thibault, C./ Touchard, F./ Touramanis, C./ Triantis, F./ Van Beveren, E./ Van Eijk, C. W. E./ Vlachos, S./ Weber, P./ Wigger, O./ Wolter, M./ Yeche, C./ Zavrtanik, D./ Zimmerman, D.


We study pi pi correlations in the exclusive reaction (p) over bar p --> 2 pi(+)2 pi(-) at rest measured by the CPLEAR experiment. Avoiding the introduction of an arbitrary reference sample, we analyse differential distributions for equal charge pion pairs removing the phase-space factor event by event. A peak at small relative momenta is most pronounced for large total momentum of the pair. The physical implications of bosonic symmetrization for the properties of the pion source, in particular its radius, are briefly discussed. The two extremes considered are the chaotic Hanbury-Brown-Twiss mechanism and the coherent Skyrmion model.
Institution and School/Department of submitter: Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών
URI: http://olympias.lib.uoi.gr/jspui/handle/123456789/16345
ISSN: 1434-6044
Link: <Go to ISI>://WOS:000072334100011
http://www.springerlink.com/content/h097255417454651/fulltext.pdf
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

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