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We present the first observation of K- and φ absorption within nuclear matter by means of π - induced reactions on C and W targets at an incident beam momentum of 1.7 GeV/c studied with HADES at SIS18/GSI. The double ratio (K-/K+)W/(K-/K+)C is found to be 0.319±0.009(stat)-0.012+0.014(syst) indicating a larger absorption of K- in heavier targets as compared to lighter ones. The measured φ/K- ratios in π-+C and π-+W reactions within the HADES acceptance are found to be equal to 0.55±0.04(stat)-0.07+0.06(syst) and to 0.63±0.06(stat)-0.11+0.11(syst), respectively. The similar ratios measured in the two different reactions demonstrate for the first time experimentally that the dynamics of the φ meson in nuclear medium is strongly coupled to the K- dynamics. The large difference in the φ production off C and W nuclei is discussed in terms of a strong φN in-medium coupling. These results are relevant for the description of heavy-ion collisions and the structure of neutron stars.

Strong Absorption of Hadrons with Hidden and Open Strangeness in Nuclear Matter

Adamczewski-Musch J.;Arnold O.;Atomssa E. T.;Behnke C.;Belounnas A.;Belyaev A.;Berger-Chen J. C.;Biernat J.;Blanco A.;Blume C.;Bohmer M.;Chernenko S.;Chlad L.;Chudoba P.;Ciepal I.;Deveaux C.;Dittert D.;Dreyer J.;Epple E.;Fabbietti L.;Fateev O.;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.;Hohne C.;Holzmann R.;Ierusalimov A.;Ivashkin A.;Kampfer B.;Kardan B.;Koenig I.;Koenig W.;Kolb B. W.;Korcyl G.;Kornakov G.;Kornas F.;Kotte R.;Kubos J.;Kugler A.;Kunz T.;Kurepin A.;Kurilkin A.;Kurilkin P.;Ladygin V.;Lalik R.;Lapidus K.;Lebedev A.;Linev S.;Lopes L.;Lorenz M.;Mahmoud T.;Maier L.;Malige A.;Markert J.;Maurus S.;Metag V.;Michel J.;Mihaylov D. M.;Mikhaylov V.;Morozov S.;Muntz C.;Munzer R.;Naumann L.;Nowakowski K.;Parpottas Y.;Pechenov V.;Pechenova O.;Petukhov O.;Pietraszko J.;Prozorov A. P.;Przygoda W.;Ramstein B.;Rathod N.;Reshetin A.;Rodriguez-Ramos P.;Rost A.;Sadovsky A.;Salabura P.;Scheib T.;Schmidt-Sommerfeld K.;Schuldes H.;Schwab E.;Scozzi F.;Seck F.;Sellheim P.;Siebenson J.;Silva L.;Smyrski J.;Spataro S.;Spies S.;Strobele H.;Stroth J.;Strzempek P.;Sturm C.;Svoboda O.;Szala M.;Tlusty P.;Traxler M.;Tsertos H.;Ungethum C.;Vazquez Doce O.;Wagner V.;Wendisch C.;Wiebusch M. G.;Wirth J.;Wojcik D.;Zanevsky Y.;Zumbruch P.;Curceanu C.;Piscicchia K.;Scordo A.

2019-01-01

Abstract

We present the first observation of K- and φ absorption within nuclear matter by means of π - induced reactions on C and W targets at an incident beam momentum of 1.7 GeV/c studied with HADES at SIS18/GSI. The double ratio (K-/K+)W/(K-/K+)C is found to be 0.319±0.009(stat)-0.012+0.014(syst) indicating a larger absorption of K- in heavier targets as compared to lighter ones. The measured φ/K- ratios in π-+C and π-+W reactions within the HADES acceptance are found to be equal to 0.55±0.04(stat)-0.07+0.06(syst) and to 0.63±0.06(stat)-0.11+0.11(syst), respectively. The similar ratios measured in the two different reactions demonstrate for the first time experimentally that the dynamics of the φ meson in nuclear medium is strongly coupled to the K- dynamics. The large difference in the φ production off C and W nuclei is discussed in terms of a strong φN in-medium coupling. These results are relevant for the description of heavy-ion collisions and the structure of neutron stars.

Scheda breve

Scheda completa

Scheda completa (DC)

	Anno
	
			2019
		
	Titolo rivista
	
			PHYSICAL REVIEW LETTERS
		
	N. Volume
	
			123
		
	Fascicolo
	
			2
		
	Pagine (da)
	
			022002-1
		
	Pagine (a)
	
			022002-6
		
	DOI
	
			https://dx.doi.org/10.1103/PhysRevLett.123.022002
		
	URL del prodotto (archivi open access, fulltext su sito editore, etc.)
	
			https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.123.022002
		
	Tutti gli autori
	
			Adamczewski-Musch J.; Arnold O.; Atomssa E.T.; Behnke C.; Belounnas A.; Belyaev A.; Berger-Chen J.C.; Biernat J.; Blanco A.; Blume C.; Bohmer M.; Chernenko S.; Chlad L.; Chudoba P.; Ciepal I.; Deveaux C.; Dittert D.; Dreyer J.; Epple E.; Fabbietti L.; Fateev O.; 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.; Hohne C.; Holzmann R.; Ierusalimov A.; Ivashkin A.; Kampfer B.; Kardan B.; Koenig I.; Koenig W.; Kolb B.W.; Korcyl G.; Kornakov G.; Kornas F.; Kotte R.; Kubos J.; Kugler A.; Kunz T.; Kurepin A.; Kurilkin A.; Kurilkin P.; Ladygin V.; Lalik R.; Lapidus K.; Lebedev A.; Linev S.; Lopes L.; Lorenz M.; Mahmoud T.; Maier L.; Malige A.; Markert J.; Maurus S.; Metag V.; Michel J.; Mihaylov D.M.; Mikhaylov V.; Morozov S.; Muntz C.; Munzer R.; Naumann L.; Nowakowski K.; Parpottas Y.; Pechenov V.; Pechenova O.; Petukhov O.; Pietraszko J.; Prozorov A.P.; Przygoda W.; Ramstein B.; Rathod N.; Reshetin A.; Rodriguez-Ramos P.; Rost A.; Sadovsky A.; Salabura P.; Scheib T.; Schmidt-Sommerfeld K.; Schuldes H.; Schwab E.; Scozzi F.; Seck F.; Sellheim P.; Siebenson J.; Silva L.; Smyrski J.; Spataro S.; Spies S.; Strobele H.; Stroth J.; Strzempek P.; Sturm C.; Svoboda O.; Szala M.; Tlusty P.; Traxler M.; Tsertos H.; Ungethum C.; Vazquez Doce O.; Wagner V.; Wendisch C.; Wiebusch M.G.; Wirth J.; Wojcik D.; Zanevsky Y.; Zumbruch P.; Curceanu C.; Piscicchia K.; Scordo A.
		
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1804561

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