Confirmation of the doubly charmed baryon Epsilon(+)(cc)(3520) via its decay to pD(+)K(-)

Ocherashvili, A.; Moinester, M. A.; Russ, J.; Engelfried, J.; Torres, I.; Akgun, U.; Alkhazov, G.; Amaro Reyes, J.; Atamantchouk, A. G.; Ayan, A. S.; Balatz, M. Y.; Bondar, N. F.; Cooper, P. S.; Dauwe, L. J.; Davidenko, G. V.; Dersch, U.; Dolgolenko, A. G.; Dzyubenko, G. B.; Edelstein, R.; Emediato, L.; Endler, A. M. E.; Eschrich, I.; Escobar, C. O.; Evdokimov, A. V.; Filimonov, I. S.; Garcia, F. G.; Gaspero, Mario; Giller, I.; Golovtsov, V. L.; Gouffon, P.; Gulmez, E.; Kangling, H.; Iori, M.; Jun, S. Y.; Kaya, M.; Kilmer, J.; Kim, V. T.; Kochenda, L. M.; Konorov, I.; Kozhevnikov, A. P.; Krivshich, A. G.; Kruger, H.; Kubantsev, M. A.; Kubarovsky, V.; Kulyavtsev, A. I.; Kuropatkin, N. P.; Kurshetsov, V. F.; Kushnirenko, A.; Kwan, S.; Lach, J.; Lamberto, A.; Landsberg, L. G.; Larin, I.; Leikin, E. M.; Y. S., Li; Luksys, M.; Lungov, T.; Maleev, V. P.; Mao, D.; Mao, C. S.; Mao, Z. L.; Mathew, P.; Mattson, M.; Matveev, V.; Mccliment, E.; Molchanov, V. V.; Morelos, A.; Nelson, K. D.; Nemitkin, A. V.; Neoustroev, P. V.; Newsom, C.; Nilov, A. P.; Nurushev, S. B.; Onel, Y.; Ozel, E.; Ozkorucuklu, S.; Penzo, A.; Petrenko, S. V.; Pogodin, P.; Procario, M.; Prutskoi, V. A.; Ramberg, E.; Rappazzo, G. F.; Razmyslovich, B. V.; Rud, V. I.; Schiavon, P.; Simon, J.; Sitnikov, A. I.; Skow, D.; Smith, V. J.; Srivastava, M.; Steiner, V.; Stepanov, V.; Stutte, L.; Svoiski, M.; Terentyev, N. K.; Thomas, Gp; Uvarov, L. N.; Vasiliev, A. N.; Vavilov, D. V.; Vazquez Jauregui, E.; Verebryusov, V. S.; Victorov, V. A.; Vishnyakov, V. E.; Vorobyov, A. A.; Vorwalter, K.; You, J.; Zhao, W. H.; Zheng, S. C.; Zukanovich Funchal, R.

doi:10.1016/j.physletb.2005.09.043

We observe a signal for the doubly charmed baryon Xi(cc)(+) in the decay mode Xi(cc)(+) -> pD(+)K(-) to complement the previous cc reported decay Xi(cc)(+) -> Lambda(c)(+)K(-)pi(+) in data from SELEX, the charm hadroproduction experiment at Fermilab. In this new decay mode we observe an excess of 5.62 events over a combinatoric background estimated by event mixing to be 1.38 +/- 0.13 events. The mixed background has Gaussian statistics, giving a signal significance of 4.8 sigma. The Poisson probability that a background fluctuation can produce the apparent signal is less than 6.4 x 10(-4). The observed mass of this state is 3518 +/- 3 MeV/c(2), consistent with the published result. Averaging the two results gives a mass of 3518.7 +/- 1.7 MeV/c(2). The observation of this new weak decay mode confirms the previous SELEX suggestion that this state is a double charm baryon. The relative branching ratio for these two modes is 0.36 +/- 0.21. (c) 2005 Elsevier B.V. All rights reserved.

Confirmation of the doubly charmed baryon Epsilon(+)(cc)(3520) via its decay to pD(+)K(-) / A., O., M. A., M., J., R., J., E., I., T., U., A., G., A., J., A.R., A. G., A., A. S., A., M. Y., B., N. F., B., P. S., C., L. J., D., G. V., D., U., D., A. G., D., G. B., D., R., E., L., E., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 628:(2005), pp. 18-24. [10.1016/j.physletb.2005.09.043]

Confirmation of the doubly charmed baryon Epsilon(+)(cc)(3520) via its decay to pD(+)K(-)

A. Ocherashvili;M. A. Moinester;J. Russ;J. Engelfried;I. Torres;U. Akgun;G. Alkhazov;J. Amaro Reyes;A. G. Atamantchouk;A. S. Ayan;M. Y. Balatz;N. F. Bondar;P. S. Cooper;L. J. Dauwe;G. V. Davidenko;U. Dersch;A. G. Dolgolenko;G. B. Dzyubenko;R. Edelstein;L. Emediato;A. M. E. Endler;I. Eschrich;C. O. Escobar;A. V. Evdokimov;I. S. Filimonov;F. G. Garcia;GASPERO, Mario;I. Giller;V. L. Golovtsov;P. Gouffon;E. Gulmez;H. Kangling;M. Iori;S. Y. Jun;M. Kaya;J. Kilmer;V. T. Kim;L. M. Kochenda;I. Konorov;A. P. Kozhevnikov;A. G. Krivshich;H. Kruger;M. A. Kubantsev;V. Kubarovsky;A. I. Kulyavtsev;N. P. Kuropatkin;V. F. Kurshetsov;A. Kushnirenko;S. Kwan;J. Lach;A. Lamberto;L. G. Landsberg;I. Larin;E. M. Leikin;Y. S. Li;M. Luksys;T. Lungov;V. P. Maleev;D. Mao;C. S. Mao;Z. L. Mao;P. Mathew;M. Mattson;V. Matveev;E. Mccliment;V. V. Molchanov;A. Morelos;K. D. Nelson;A. V. Nemitkin;P. V. Neoustroev;C. Newsom;A. P. Nilov;S. B. Nurushev;Y. Onel;E. Ozel;S. Ozkorucuklu;A. Penzo;S. V. Petrenko;P. Pogodin;M. Procario;V. A. Prutskoi;E. Ramberg;G. F. Rappazzo;B. V. Razmyslovich;V. I. Rud;P. Schiavon;J. Simon;A. I. Sitnikov;D. Skow;V. J. Smith;M. Srivastava;V. Steiner;V. Stepanov;L. Stutte;M. Svoiski;N. K. Terentyev;Thomas Gp;L. N. Uvarov;A. N. Vasiliev;D. V. Vavilov;E. Vazquez Jauregui;V. S. Verebryusov;V. A. Victorov;V. E. Vishnyakov;A. A. Vorobyov;K. Vorwalter;J. You;W. H. Zhao;S. C. Zheng;R. Zukanovich Funchal

2005

Abstract

We observe a signal for the doubly charmed baryon Xi(cc)(+) in the decay mode Xi(cc)(+) -> pD(+)K(-) to complement the previous cc reported decay Xi(cc)(+) -> Lambda(c)(+)K(-)pi(+) in data from SELEX, the charm hadroproduction experiment at Fermilab. In this new decay mode we observe an excess of 5.62 events over a combinatoric background estimated by event mixing to be 1.38 +/- 0.13 events. The mixed background has Gaussian statistics, giving a signal significance of 4.8 sigma. The Poisson probability that a background fluctuation can produce the apparent signal is less than 6.4 x 10(-4). The observed mass of this state is 3518 +/- 3 MeV/c(2), consistent with the published result. Averaging the two results gives a mass of 3518.7 +/- 1.7 MeV/c(2). The observation of this new weak decay mode confirms the previous SELEX suggestion that this state is a double charm baryon. The relative branching ratio for these two modes is 0.36 +/- 0.21. (c) 2005 Elsevier B.V. All rights reserved.

Scheda breve

Scheda completa

	Anno di pubblicazione
	
				2005
			
	Parole chiave
	
				doubly charmed baryon
			
	Tipologia
	
				01 Pubblicazione su rivista::01a Articolo in rivista
			
	Citazione
	
				Confirmation of the doubly charmed baryon Epsilon(+)(cc)(3520) via its decay to pD(+)K(-) / A., O., M. A., M., J., R., J., E., I., T., U., A., G., A., J., A.R., A. G., A., A. S., A., M. Y., B., N. F., B., P. S., C., L. J., D., G. V., D., U., D., A. G., D., G. B., D., R., E., L., E., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 628:(2005), pp. 18-24. [10.1016/j.physletb.2005.09.043]
			
	Appartiene alla tipologia:
	
				01a Articolo in rivista

File allegati a questo prodotto

Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/19736

Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni

ND

307

293

Catalogo dei prodotti della ricerca