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We present data on charged kaons (K±) and ϕ mesons in Au(1.23A GeV)+Au collisions. It is the first simultaneous measurement of K− and ϕ mesons in central heavy-ion collisions below a kinetic beam energy of 10A GeV. The ϕ/K− multiplicity ratio is found to be surprisingly high with a value of 0.52±0.16 and shows no dependence on the centrality of the collision. Consequently, the different slopes of the K+ and K− transverse-mass spectra can be explained solely by feed-down, which substantially softens the spectra of K− mesons. Hence, in contrast to the commonly adapted argumentation in literature, the different slopes do not necessarily imply diverging freeze-out temperatures of K+ and K− mesons caused by different couplings to baryons.

Deep sub-threshold ϕ production in Au+Au collisions

Adamczewski-Musch J.;Arnold O.;Behnke C.;Belounnas A.;Belyaev A.;Berger-Chen J. C.;Biernat J.;Blanco A.;Blume C.;Bohmer M.;Bordalo P.;Chernenko S.;Chlad L.;Deveaux C.;Dreyer J.;Dybczak A.;Epple E.;Fabbietti L.;Fateev O.;Filip P.;Fonte P.;Franco C.;Friese J.;Frohlich I.;Galatyuk T.;Garzon J. A.;Gernhauser R.;Golubeva M.;Greifenhagen R.;Guber F.;Gumberidze M.;Harabasz S.;Heinz T.;Hennino T.;Hlavac S.;Hohne C.;Holzmann R.;Ierusalimov A.;Ivashkin A.;Kampfer B.;Karavicheva T.;Kardan B.;Koenig I.;Koenig W.;Kolb B. W.;Korcyl G.;Kornakov G.;Kotte R.;Kuhn W.;Kugler A.;Kunz T.;Kurepin A.;Kurilkin A.;Kurilkin P.;Ladygin V.;Lalik R.;Lapidus K.;Lebedev A.;Lopes L.;Lorenz M.;Mahmoud T.;Maier L.;Mangiarotti A.;Markert J.;Maurus S.;Metag V.;Michel J.;Mihaylov D. M.;Morozov S.;Muntz C.;Munzer R.;Naumann L.;Nowakowski K. N.;Palka M.;Parpottas Y.;Pechenov V.;Pechenova O.;Petukhov O.;Pietraszko J.;Przygoda W.;Ramos S.;Ramstein B.;Reshetin A.;Rodriguez-Ramos P.;Rosier P.;Rost A.;Sadovsky A.;Salabura P.;Scheib T.;Schuldes H.;Schwab E.;Scozzi F.;Seck F.;Sellheim P.;Siebenson J.;Silva L.;Sobolev Y. G.;Spataro S.;Strobele H.;Stroth J.;Strzempek P.;Sturm C.;Svoboda O.;Szala M.;Tlusty P.;Traxler M.;Tsertos H.;Usenko E.;Wagner V.;Wendisch C.;Wiebusch M. G.;Wirth J.;Zanevsky Y.;Zumbruch P.

2018-01-01

Abstract

We present data on charged kaons (K±) and ϕ mesons in Au(1.23A GeV)+Au collisions. It is the first simultaneous measurement of K− and ϕ mesons in central heavy-ion collisions below a kinetic beam energy of 10A GeV. The ϕ/K− multiplicity ratio is found to be surprisingly high with a value of 0.52±0.16 and shows no dependence on the centrality of the collision. Consequently, the different slopes of the K+ and K− transverse-mass spectra can be explained solely by feed-down, which substantially softens the spectra of K− mesons. Hence, in contrast to the commonly adapted argumentation in literature, the different slopes do not necessarily imply diverging freeze-out temperatures of K+ and K− mesons caused by different couplings to baryons.

Scheda breve

Scheda completa

Scheda completa (DC)

	Anno
	
			2018
		
	Titolo rivista
	
			PHYSICS LETTERS. SECTION B
		
	N. Volume
	
			778
		
	Pagine (da)
	
			403
		
	Pagine (a)
	
			407
		
	DOI
	
			https://dx.doi.org/10.1016/j.physletb.2018.01.048
		
	URL del prodotto (archivi open access, fulltext su sito editore, etc.)
	
			https://www.sciencedirect.com/science/article/pii/S037026931830056X?via=ihub
		
	Tutti gli autori
	
			Adamczewski-Musch J.; Arnold O.; Behnke C.; Belounnas A.; Belyaev A.; Berger-Chen J.C.; Biernat J.; Blanco A.; Blume C.; Bohmer M.; Bordalo P.; Chernenko S.; Chlad L.; Deveaux C.; Dreyer J.; Dybczak A.; Epple E.; Fabbietti L.; Fateev O.; Filip P.; Fonte P.; Franco C.; Friese J.; Frohlich I.; Galatyuk T.; Garzon J.A.; Gernhauser R.; Golubeva M.; Greifenhagen R.; Guber F.; Gumberidze M.; Harabasz S.; Heinz T.; Hennino T.; Hlavac S.; Hohne C.; Holzmann R.; Ierusalimov A.; Ivashkin A.; Kampfer B.; Karavicheva T.; Kardan B.; Koenig I.; Koenig W.; Kolb B.W.; Korcyl G.; Kornakov G.; Kotte R.; Kuhn W.; Kugler A.; Kunz T.; Kurepin A.; Kurilkin A.; Kurilkin P.; Ladygin V.; Lalik R.; Lapidus K.; Lebedev A.; Lopes L.; Lorenz M.; Mahmoud T.; Maier L.; Mangiarotti A.; Markert J.; Maurus S.; Metag V.; Michel J.; Mihaylov D.M.; Morozov S.; Muntz C.; Munzer R.; Naumann L.; Nowakowski K.N.; Palka M.; Parpottas Y.; Pechenov V.; Pechenova O.; Petukhov O.; Pietraszko J.; Przygoda W.; Ramos S.; Ramstein B.; Reshetin A.; Rodriguez-Ramos P.; Rosier P.; Rost A.; Sadovsky A.; Salabura P.; Scheib T.; Schuldes H.; Schwab E.; Scozzi F.; Seck F.; Sellheim P.; Siebenson J.; Silva L.; Sobolev Y.G.; Spataro S.; Strobele H.; Stroth J.; Strzempek P.; Sturm C.; Svoboda O.; Szala M.; Tlusty P.; Traxler M.; Tsertos H.; Usenko E.; Wagner V.; Wendisch C.; Wiebusch M.G.; Wirth J.; Zanevsky Y.; Zumbruch P.
		
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1804117

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