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We report on the first measurement of p Lambda and pp correlations via the femtoscopy method in p + Nb reactions at root sNN = 3.18 GeV, studied with the High Acceptance Di-Electron Spectrometer (HADES). By comparing the experimental correlation function to model calculations, a source size for pp pairs of r(0,pp) = 2.02 +/- 0.01(stat)(-0.12)(+0.11)(sys) fm and a slightly smaller value for p Lambda pairs of r(0,Lambda p) = 1.62 +/- 0.02(stat)(-0.08)(+0.19)(sys) fm are extracted. Using the geometrical extent of the particle-emitting region, determined experimentally with pp correlations as reference together with a source function from a transport model, it is possible to study different sets of scattering parameters. The p Lambda correlation is proven to be sensitive to predicted scattering length values from chiral effective field theory. We demonstrate that the femtoscopy technique can be used as a valid alternative to the analysis of scattering data to study the hyperon-nucleon interaction.

Λp interaction studied via femtoscopy in p + Nb reactions at s NN =3.18 GeV

Adamczewski Musch, J.;Agakishiev, G.;Arnold, O.;Atomssa, E. T.;Behnke, C.;Berger Chen, J. C.;Biernat, J.;Blanco, A.;Blume, C.;Böhmer, M.;Bordalo, P.;Chernenko, S.;Deveaux, C.;Dybczak, A.;Epple, E.;Fabbietti, L.;Fateev, O.;Fonte, P.;Franco, C.;Friese, J.;Fröhlich, I.;Galatyuk, T.;Garzón, J. A.;Gill, K.;Golubeva, M.;Guber, F.;Gumberidze, M.;Harabasz, S.;Hennino, T.;Hlavac, S.;Höhne, C.;Holzmann, R.;Ierusalimov, A.;Ivashkin, A.;Jurkovic, M.;Kämpfer, B.;Karavicheva, T.;Kardan, B.;Koenig, I.;Koenig, W.;Kolb, B. W.;Korcyl, G.;Kornakov, G.;Kotte, R.;Krása, A.;Krebs, E.;Kuc, H.;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.;Maurus, S.;Mangiarotti, A.;Markert, J.;Metag, V.;Michel, J.;Müntz, C.;Münzer, R.;Naumann, L.;Palka, M.;Parpottas, Y.;Pechenov, V.;Pechenova, O.;Petousis, V.;Pietraszko, J.;Przygoda, W.;Ramos, S.;Ramstein, B.;Rehnisch, L.;Reshetin, A.;Rost, A.;Rustamov, A.;Sadovsky, A.;Salabura, P.;Scheib, T.;Schmidt Sommerfeld, K.;Schuldes, H.;Sellheim, P.;Siebenson, J.;Silva, L.;Sobolev, Y.u. G.;SPATARO, STEFANO GIOVANNI;Ströbele, H.;Stroth, J.;Strzempek, P.;Sturm, C.;Svoboda, O.;Tarantola, A.;Teilab, K.;Tlusty, P.;Traxler, M.;Tsertos, H.;Vasiliev, T.;Wagner, V.;Wendisch, C.;Wirth, J.;Wüstenfeld, J.;Zanevsky, Y.;Zumbruch, P.

2016-01-01

Abstract

We report on the first measurement of p Lambda and pp correlations via the femtoscopy method in p + Nb reactions at root sNN = 3.18 GeV, studied with the High Acceptance Di-Electron Spectrometer (HADES). By comparing the experimental correlation function to model calculations, a source size for pp pairs of r(0,pp) = 2.02 +/- 0.01(stat)(-0.12)(+0.11)(sys) fm and a slightly smaller value for p Lambda pairs of r(0,Lambda p) = 1.62 +/- 0.02(stat)(-0.08)(+0.19)(sys) fm are extracted. Using the geometrical extent of the particle-emitting region, determined experimentally with pp correlations as reference together with a source function from a transport model, it is possible to study different sets of scattering parameters. The p Lambda correlation is proven to be sensitive to predicted scattering length values from chiral effective field theory. We demonstrate that the femtoscopy technique can be used as a valid alternative to the analysis of scattering data to study the hyperon-nucleon interaction.

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Scheda completa

Scheda completa (DC)

	Anno
	
			2016
		
	Titolo rivista
	
			PHYSICAL REVIEW C
		
	N. Volume
	
			94
		
	Fascicolo
	
			2
		
	Pagine (da)
	
			025201-1
		
	Pagine (a)
	
			025201-12
		
	DOI
	
			https://dx.doi.org/10.1103/PhysRevC.94.025201
		
	URL del prodotto (archivi open access, fulltext su sito editore, etc.)
	
			http://harvest.aps.org/bagit/articles/10.1103/PhysRevC.94.025201/apsxml
		
	Parole Chiave
	
			Nuclear and High Energy Physics
		
	Tutti gli autori
	
			Adamczewski-Musch, J.; Agakishiev, G.; Arnold, O.; Atomssa, E.T.; Behnke, C.; Berger-Chen, J.C.; Biernat, J.; Blanco, A.; Blume, C.; Böhmer, M.; Bordalo, P.; Chernenko, S.; Deveaux, C.; Dybczak, A.; Epple, E.; Fabbietti, L.; Fateev, O.; Fonte, P.; Franco, C.; Friese, J.; Fröhlich, I.; Galatyuk, T.; Garzón, J.A.; Gill, K.; Golubeva, M.; Guber, F.; Gumberidze, M.; Harabasz, S.; Hennino, T.; Hlavac, S.; Höhne, C.; Holzmann, R.; Ierusalimov, A.; Ivashkin, A.; Jurkovic, M.; Kämpfer, B.; Karavicheva, T.; Kardan, B.; Koenig, I.; Koenig, W.; Kolb, B.W.; Korcyl, G.; Kornakov, G.; Kotte, R.; Krása, A.; Krebs, E.; Kuc, H.; 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.; Maurus, S.; Mangiarotti, A.; Markert, J.; Metag, V.; Michel, J.; Müntz, C.; Münzer, R.; Naumann, L.; Palka, M.; Parpottas, Y.; Pechenov, V.; Pechenova, O.; Petousis, V.; Pietraszko, J.; Przygoda, W.; Ramos, S.; Ramstein, B.; Rehnisch, L.; Reshetin, A.; Rost, A.; Rustamov, A.; Sadovsky, A.; Salabura, P.; Scheib, T.; Schmidt-Sommerfeld, K.; Schuldes, H.; Sellheim, P.; Siebenson, J.; Silva, L.; Sobolev, Yu. G.; Spataro, S.; Ströbele, H.; Stroth, J.; Strzempek, P.; Sturm, C.; Svoboda, O.; Tarantola, A.; Teilab, K.; Tlusty, P.; Traxler, M.; Tsertos, H.; Vasiliev, T.; Wagner, V.; Wendisch, C.; Wirth, J.; Wüstenfeld, 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/2318/1635149

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