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Results on the production of the double strange cascade hyperon Xi(-) are reported for collisions of p(3.5 GeV) + Nb, studied with the High Acceptance Di-Electron Spectrometer (HADES) at SIS18 at GSI Helmholtzzentrum for Heavy-Ion Research, Darmstadt. For the first time, subthreshold Xi(-) production is observed in proton-nucleus interactions. Assuming a Xi(-) phase-space distribution similar to that of. hyperons, the production probability amounts to P Xi- = [2.0 +/- 0.4(stat) +/- 0.3(norm) +/- 0.6(syst)] x 10(-4) resulting in a Xi(-)/d(Lambda + Sigma(0)) ratio of P Xi-/P Lambda+Sigma 0 = [1.2 +/- 0.3(stat) +/- 0.4(syst)] x 10(-2). Available model predictions are significantly lower than the measured Xi(-) yield.

Subthreshold Ξ- Production in collisions of p (3.5GeV)+Nb

Agakishiev, G.;Arnold, O.;Balanda, A.;Belver, D.;Belyaev, A. V.;Berger Chen, J. C.;Blanco, A.;Böhmer, M.;Boyard, J. L.;Cabanelas, P.;Chernenko, S.;Dybczak, A.;Epple, E.;Fabbietti, L.;Fateev, O. V.;Finocchiaro, P;Fonte, P.;Friese, J.;Fröhlich, I.;Galatyuk, T.;Garzón, J. A.;Gernhäuser, R.;Göbel, K.;Golubeva, M.;González Díaz, D.;Guber, F.;Gumberidze, M.;Heinz, T.;Hennino, T.;Holzmann, R.;Ierusalimov, A.;Iori, I.;Ivashkin, A.;Jurkovic, M.;Kämpfer, B.;Karavicheva, T.;Koenig, I.;Koenig, W.;Kolb, B. W.;Kornakov, G.;Kotte, R.;Krása, A.;Krizek, F.;Krücken, R.;Kuc, H.;Kühn, W.;Kugler, A.;Kurepin, A.;Ladygin, V.;Lalik, R.;Lang, S.;Lapidus, K.;Lebedev, A.;Liu, T.;Lopes, L.;Lorenz, M.;Maier, L.;Mangiarotti, A.;Markert, J.;Metag, V.;Michalska, B.;Michel, J.;Müntz, C.;Müntzer, R.;Naumann, L.;Pachmayer, Y. C.;Palka, M.;Parpottas, Y.;Pechenov, V.;Pechenova, O.;Pietraszko, J.;Przygoda, W.;Ramstein, B.;Reshetin, A.;Rustamov, A.;Sadovsky, A.;Salabura, P.;Schmah, A.;Schwab, E.;Siebenson, J.;Sobolev, Y.u. G.;SPATARO, STEFANO GIOVANNI;Spruck, B.;Ströbele, H.;Stroth, J.;Sturm, C.;Tarantola, A.;Teilab, K.;Tlusty, P.;Traxler, M.;Trebacz, R.;Tsertos, H.;Vasiliev, T.;Wagner, V.;Weber, M.;Wendisch, C.;Wüstenfeld, J.;Yurevich, S.;Zanevsky, Y. V.

2015-01-01

Abstract

Results on the production of the double strange cascade hyperon Xi(-) are reported for collisions of p(3.5 GeV) + Nb, studied with the High Acceptance Di-Electron Spectrometer (HADES) at SIS18 at GSI Helmholtzzentrum for Heavy-Ion Research, Darmstadt. For the first time, subthreshold Xi(-) production is observed in proton-nucleus interactions. Assuming a Xi(-) phase-space distribution similar to that of. hyperons, the production probability amounts to P Xi- = [2.0 +/- 0.4(stat) +/- 0.3(norm) +/- 0.6(syst)] x 10(-4) resulting in a Xi(-)/d(Lambda + Sigma(0)) ratio of P Xi-/P Lambda+Sigma 0 = [1.2 +/- 0.3(stat) +/- 0.4(syst)] x 10(-2). Available model predictions are significantly lower than the measured Xi(-) yield.

Scheda breve

Scheda completa

Scheda completa (DC)

	Anno
	
			2015
		
	Titolo rivista
	
			PHYSICAL REVIEW LETTERS
		
	N. Volume
	
			114
		
	Fascicolo
	
			21
		
	Pagine (da)
	
			212301-1
		
	Pagine (a)
	
			212301-7
		
	DOI
	
			https://dx.doi.org/10.1103/PhysRevLett.114.212301
		
	URL del prodotto (archivi open access, fulltext su sito editore, etc.)
	
			http://harvest.aps.org/bagit/articles/10.1103/PhysRevLett.114.212301/apsxml
		
	Parole Chiave
	
			Physics and Astronomy (all)
		
	Tutti gli autori
	
			Agakishiev, G.; Arnold, O.; Balanda, A.; Belver, D.; Belyaev, A.V.; Berger-Chen, J.C.; Blanco, A.; Böhmer, M.; Boyard, J.L.; Cabanelas, P.; Chernenko, S.; Dybczak, A.; Epple, E.; Fabbietti, L.; Fateev, O.V.; Finocchiaro, P; Fonte, P.; Friese, J.; Fröhlich, I.; Galatyuk, T.; Garzón, J.A.; Gernhäuser, R.; Göbel, K.; Golubeva, M.; González-Díaz, D.; Guber, F.; Gumberidze, M.; Heinz, T.; Hennino, T.; Holzmann, R.; Ierusalimov, A.; Iori, I.; Ivashkin, A.; Jurkovic, M.; Kämpfer, B.; Karavicheva, T.; Koenig, I.; Koenig, W.; Kolb, B.W.; Kornakov, G.; Kotte, R.; Krása, A.; Krizek, F.; Krücken, R.; Kuc, H.; Kühn, W.; Kugler, A.; Kurepin, A.; Ladygin, V.; Lalik, R.; Lang, S.; Lapidus, K.; Lebedev, A.; Liu, T.; Lopes, L.; Lorenz, M.; Maier, L.; Mangiarotti, A.; Markert, J.; Metag, V.; Michalska, B.; Michel, J.; Müntz, C.; Müntzer, R.; Naumann, L.; Pachmayer, Y.C.; Palka, M.; Parpottas, Y.; Pechenov, V.; Pechenova, O.; Pietraszko, J.; Przygoda, W.; Ramstein, B.; Reshetin, A.; Rustamov, A.; Sadovsky, A.; Salabura, P.; Schmah, A.; Schwab, E.; Siebenson, J.; Sobolev, Yu.G.; Spataro, S.; Spruck, B.; Ströbele, H.; Stroth, J.; Sturm, C.; Tarantola, A.; Teilab, K.; Tlusty, P.; Traxler, M.; Trebacz, R.; Tsertos, H.; Vasiliev, T.; Wagner, V.; Weber, M.; Wendisch, C.; Wüstenfeld, J.; Yurevich, S.; Zanevsky, Y.V.
		
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1571827

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