Search for pentaquarks in the hadronic decays of the Z boson with the DELPHI detector at LEP

Abdallah, J.; Abreu, P.; Adam, W.; Adzic, P.; Albrecht, T.; Alemany Fernandez, R.; Allmendinger, T.; Allport, P.P.; Amaldi, U.; Amapane, N.; Amato, S.; Anashkin, E.; Andreazza, A.; Andringa, S.; Anjos, N.; Antilogus, P.; Apel, W.D.; Arnoud, Y.; Ask, S.; Asman, B.; Augustin, J.E.; Augustinus, A.; Baillon, P.; Ballestrero, A.; Bambade, P.; Barbier, R.; Bardin, D.; Barker, G.J.; Baroncelli, A.; Battaglia, M.; Baubillier, M.; Becks, K.H.; Begalli, M.; Behrmann, A.; Ben Haim, E.; Benekos, N.; Benvenuti, A.; Berat, C.; Berggren, M.; Bertrand, D.; Besancon, M.; Besson, N.; Bloch, D.; Blom, M.; Bluj, M.; Bonesini, M.; Boonekamp, M.; Booth, P.S.L.; Borisov, G.; Botner, O.; Bouquet, B.; Bowcock, T.J.V.; Boyko, I.; Bracko, M.; Brenner, R.; Brodet, E.; Bruckman, P.; Brunet, J.M.; Buschbeck, B.; Buschmann, P.; Calvi, M.; Camporesi, T.; Canale, V.; Carena, F.; Castro, N.; Cavallo, F.; Chapkin, M.; Charpentier, P.; Checchia, P.; Chierici, R.; Shlyapnikov, P.; Chudoba, J.; Chung, S.U.; Cieslik, K.; Collins, P.; Contri, R.; Cosme, G.; Cossutti, F.; Costa, M.J.; Crennell, D.J.; Cuevas Maestro, J.; D'Hondt, J.; Da Silva, T.; Da Silva, W.; Della Ricca, G.; De Angelis, A.; de Boer, W.; De Clercq, C.; De Lotto, B.; De Maria, N.; De Min, A.; De Paula, L.; Di Ciaccio, L.; Di Simone, A.; Doroba, K.; Drees, J.; Eigen, G.; Ekelof, T.J.C.; Ellert, M.; Elsing, M.; Espirito Santo, M.C.; Fanourakis, G.K.; Fassouliotis, D.; Feindt, M.; Fernandez, J.; Ferrer, A.; Ferro, F.; Flagmeyer, U.; Foeth, H.; Fokitis, E.; Fulda Quenzer, F.; Fuster, J.; Gandelman, M.; Garciâ­a, C.; Gavillet, P.; Gazis, E.; Gokieli, R.; Golob, B.; Gomez Ceballos, G.; Goncalves, P.; Graziani, E.; Grosdidier, G.; Grzelak, K.; Guy, J.; Haag, C.; Hallgren, A.; Hamacher, K.; Hamilton, K.; Haug, S.; Hauler, F.; Hedberg, V.; Hennecke, M.; Herr, H.; Hoffman, J.; Holmgren, S.O.; Holt, P.J.; Houlden, M.A.; Jackson, J.N.; Jarlskog, G.; Jarry, P.; Jeans, D.; Johansson, E.K.; Jonsson, P.; Joram, C.; Jungermann, L.; Kapusta, F.; Katsanevas, S.; Kokkinias, P.; Leinonen, L.; Katsoufis, E.; Kernel, G.; Kersevan, B.P.; Krumshtein, Z.; Lesiak, T.; Kerzel, U.; Liebig, W.; King, B.T.; Lamsa, J.; Liko, D.; Kjaer, N.J.; Leder, G.; Kluit, P.; Kourkoumelis, C.; Leitner, R.; Kuznetsov, O.; Kucharczyk, M.; Ledroit, F.; Lopes, J.H.; Lemonne, J.; Lepeltier, V.; Lipniacka, A.; Lopez, J.M.; Loukas, D.; Lutz, P.; Lyons, L.; Macnaughton, J.; Malek, A.; Maltezos, S.; Mandl, F.; Marco, J.; Marco, R.; Marechal, B.; Margoni, M.; Marin, J.C.; Mariotti, C.; Markou, A.; Marti­nez Rivero, C.; Masik, J.; Mastroyiannopoulos, N.; Matorras, F.; Matteuzzi, C.; Mazzucato, F.; Mazzucato, M.; Mcnulty, R.; Meroni, C.; Migliore, E.; Mitaroff, W.A.; Mjoernmark, U.; Moa, T.; Moch, M.; Moenig, K.; Monge, R.; Montenegro, J.; Moraes, D.; Moreno, S.; Morettini, P.; Mueller, U.; Muenich, K.; Mulders, M.; Mundim, L.; Murray, W.; Muryn, B.; Myatt, G.; Myklebust, T.; Paganoni, M.; Nassiakou, M.; Paiano, S.; Navarria, F.; Nawrocki, K.; Nicolaidou, R.; Nikolenko, M.; Ouraou, A.; Parkes, C.; Oblakowska Mucha, A.; Oyanguren, A.; Obraztsov, V.F.; Olshevski, A.; Palacios, J.P.; Onofre, A.; Palka, H.; Orava, R.; Osterberg, K.; Pape, L.; Papadopoulou, T.D.; Parodi, F.; Parzefall, U.; Passeri, A.; Passon, O.; Peralta, L.; Perepelitsa, V.; Perrotta, A.; Petrolini, A.; Piedra, J.; Pieri, L.; Pierre, F.; Pimenta, M.; Piotto, E.; Podobnik, T.; Poireau, V.; Pol, M.E.; Polok, G.; Pozdnyakov, V.; Pukhaeva, N.; Pullia, A.; Rames, J.; Read, A.; Rebecchi, P.; Rehn, J.; Reid, D.; Reinhardt, R.; Renton, P.B.; Richard, F.; Ri­dky, J.; Rivero, M.; Rodriguez, D.; Romero, A.; Ronchese, P.; Roudeau, P.; Rovelli, T.; Ruhlmann Kleider, V.; Ryabtchikov, D.; Sadovskii, A.; Salmi, L.; Salt, J.; Sander, C.; Savoy Navarro, A.; Schwickerath, U.; Sekulin, R.; Siebel, M.; Sisakian, A.; Smadja, G.; Smirnova, O.; Sokolov, A.; Sopczak, A.; Sosnowski, R.; Spassoff, T.; Stanitzki, M.; Stocchi, A.; Strauss, J.; Stugu, B.; Szczekowski, M.; Szeptycka, M.; Szumlak, T.; Tabarelli de Fatis, T.; Tegenfeldt, F.; Timmermans, J.; Tkatchev, L.; Tobin, M.; Todorovova, S.; Tome, B.; Tonazzo, A.; Tortosa, P.; Travnicek, P.; Treille, D.; Tristram, G.; Trochimczuk, M.; Troncon, C.; Turluer, M.L.; Tyapkin, I.A.; Tyapkin, P.; Tzamarias, S.; Uvarov, V.; Valenti, G.; van Dam, P.; Van Eldik, J.; Van Remortel, N.; Van Vulpen, I.; Vegni, G.; Veloso, F.; Venus, W.; Verdier, P.; Verzi, V.; Vilanova, D.; Vitale, L.; Vrba, V.; Wahlen, H.; Washbrook, A.J.; Weiser, C.; Wicke, D.; Wickens, J.; Wilkinson, G.; Winter, M.; Witek, M.; Yushchenko, O.; Zalewska Bak, A.; Zalewski, P.; Zavrtanik, D.; Zhuravlov, V.; Zimin, N.I.; Zintchenko, A.; Zupan, M.

doi:10.1016/j.physletb.2007.08.005

The quark model does not exclude states composed of more than three quarks, like pentaquark systems. Controversial evidence for such states has been published in the last years, in particular: for a strange pentaquark Theta(1540)+; for a double-strange state, the Xi(1862)--, subsequently called Phi(1860)--; and for a charmed state, the Theta_c(3100)^0. If confirmed, a full pentaquark family might exist; such pentaquark states could be produced in e+e- annihilations near the Z energy. In this paper a search for pentaquarks is described using the DELPHI detector at LEP, characterized by powerful particle identification sub-systems crucial in the separation of the signal from the background for these states. At 95% CL, upper limits are set on the production rates <N> of such particles and their charge-conjugate state per Z decay: <N_Theta+> x Br(Theta+ -> pK0_S) < 5.1 x 10^{-4} <N_Theta++> < 1.6 x 10^{-3} <N_Phi(1860)-- > x Br(Phi(1860)-- -> Xi- pi-) < 2.9 x 10^{-4} <Theta_c(3100)^0> x Br(Theta_c(3100)^0 -> D*+ pbar) < 8.8 x 10^{-4} .

Search for pentaquarks in the hadronic decays of the Z boson with the DELPHI detector at LEP / J. Abdallah, P. Abreu, W. Adam, P. Adzic, T. Albrecht, R. Alemany-Fernandez, T. Allmendinger, P.P. Allport, U. Amaldi, N. Amapane, S. Amato, E. Anashkin, A. Andreazza, S. Andringa, N. Anjos, P. Antilogus, W.D. Apel, Y. Arnoud, S. Ask, B. Asman, J.E. Augustin, A. Augustinus, P. Baillon, A. Ballestrero, P. Bambade, R. Barbier, D. Bardin, G.J. Barker, A. Baroncelli, M. Battaglia, M. Baubillier, K.H. Becks, M. Begalli, A. Behrmann, E. Ben-Haim, N. Benekos, A. Benvenuti, C. Berat, M. Berggren, D. Bertrand, M. Besancon, N. Besson, D. Bloch, M. Blom, M. Bluj, M. Bonesini, M. Boonekamp, P.S.L. Booth, G. Borisov, O. Botner, B. Bouquet, T.J.V. Bowcock, I. Boyko, M. Bracko, R. Brenner, E. Brodet, P. Bruckman, J.M. Brunet, B. Buschbeck, P. Buschmann, M. Calvi, T. Camporesi, V. Canale, F. Carena, N. Castro, F. Cavallo, M. Chapkin, P. Charpentier, P. Checchia, R. Chierici, P. Shlyapnikov, J. Chudoba, S.U. Chung, K. Cieslik, P. Collins, R. Contri, G. Cosme, F. Cossutti, M.J. Costa, D.J. Crennell, J. Cuevas-Maestro, J. D'Hondt, T. Da Silva, W. Da Silva, G. Della Ricca, A. De Angelis, W. de Boer, C. De Clercq, B. De Lotto, N. De Maria, A. De Min, L. De Paula, L. Di Ciaccio, A. Di Simone, K. Doroba, J. Drees, G. Eigen, T.J.C. Ekelof, M. Ellert, M. Elsing, M.C. Espirito-Santo, G.K. Fanourakis, D. Fassouliotis, M. Feindt, J. Fernandez, A. Ferrer, F. Ferro, U. Flagmeyer, H. Foeth, E. Fokitis, F. Fulda-Quenzer, J. Fuster, M. Gandelman, C. GarciÂa, P. Gavillet, E. Gazis, R. Gokieli, B. Golob, G. Gomez-Ceballos, P. Goncalves, E. Graziani, G. Grosdidier, K. Grzelak, J. Guy, C. Haag, A. Hallgren, K. Hamacher, K. Hamilton, S. Haug, F. Hauler, V. Hedberg, M. Hennecke, H. Herr, J. Hoffman, S.O. Holmgren, P.J. Holt, M.A. Houlden, J.N. Jackson, G. Jarlskog, P. Jarry, D. Jeans, E.K. Johansson, P. Jonsson, C. Joram, L. Jungermann, F. Kapusta, S. Katsanevas, P. Kokkinias, L. Leinonen, E. Katsoufis, G. Kernel, B.P. Kersevan, Z. Krumshtein, T. Lesiak, U. Kerzel, W. Liebig, B.T. King, J. Lamsa, D. Liko, N.J. Kjaer, G. Leder, P. Kluit, C. Kourkoumelis, R. Leitner, O. Kuznetsov, M. Kucharczyk, F. Ledroit, J.H. Lopes, J. Lemonne, V. Lepeltier, A. Lipniacka, J.M. Lopez, D. Loukas, P. Lutz, L. Lyons, J. MacNaughton, A. Malek, S. Maltezos, F. Mandl, J. Marco, R. Marco, B. Marechal, M. Margoni, J.C. Marin, C. Mariotti, A. Markou, C. Martinez-Rivero, J. Masik, N. Mastroyiannopoulos, F. Matorras, C. Matteuzzi, F. Mazzucato, M. Mazzucato, R. McNulty, C. Meroni, E. Migliore, W.A. Mitaroff, U. Mjoernmark, T. Moa, M. Moch, K. Moenig, R. Monge, J. Montenegro, D. Moraes, S. Moreno, P. Morettini, U. Mueller, K. Muenich, M. Mulders, L. Mundim, W. Murray, B. Muryn, G. Myatt, T. Myklebust, M. Paganoni, M. Nassiakou, S. Paiano, F. Navarria, K. Nawrocki, R. Nicolaidou, M. Nikolenko, A. Ouraou, C. Parkes, A. Oblakowska-Mucha, A. Oyanguren, V.F. Obraztsov, A. Olshevski, J.P. Palacios, A. Onofre, H. Palka, R. Orava, K. Osterberg, L. Pape, T.D. Papadopoulou, F. Parodi, U. Parzefall, A. Passeri, O. Passon, L. Peralta, V. Perepelitsa, A. Perrotta, A. Petrolini, J. Piedra, L. Pieri, F. Pierre, M. Pimenta, E. Piotto, T. Podobnik, V. Poireau, M.E. Pol, G. Polok, V. Pozdnyakov, N. Pukhaeva, A. Pullia, J. Rames, A. Read, P. Rebecchi, J. Rehn, D. Reid, R. Reinhardt, P.B. Renton, F. Richard, J. Ridky, M. Rivero, D. Rodriguez, A. Romero, P. Ronchese, P. Roudeau, T. Rovelli, V. Ruhlmann-Kleider, D. Ryabtchikov, A. Sadovskii, L. Salmi, J. Salt, C. Sander, A. Savoy-Navarro, U. Schwickerath, R. Sekulin, M. Siebel, A. Sisakian, G. Smadja, O. Smirnova, A. Sokolov, A. Sopczak, R. Sosnowski, T. Spassoff, M. Stanitzki, A. Stocchi, J. Strauss, B. Stugu, M. Szczekowski, M. Szeptycka, T. Szumlak, T. Tabarelli de Fatis, F. Tegenfeldt, J. Timmermans, L. Tkatchev, M. Tobin, S. Todorovova, B. Tome, A. Tonazzo, P. Tortosa, P. Travnicek, D. Treille, G. Tristram, M. Trochimczuk, C. Troncon, M.L. Turluer, I.A. Tyapkin, P. Tyapkin, S. Tzamarias, V. Uvarov, G. Valenti, P. van Dam, J. Van Eldik, N. Van Remortel, I. Van Vulpen, G. Vegni, F. Veloso, W. Venus, P. Verdier, V. Verzi, D. Vilanova, L. Vitale, V. Vrba, H. Wahlen, A.J. Washbrook, C. Weiser, D. Wicke, J. Wickens, G. Wilkinson, M. Winter, M. Witek, O. Yushchenko, A. Zalewska-Bak, P. Zalewski, D. Zavrtanik, V. Zhuravlov, N.I. Zimin, A. Zintchenko, M. Zupan. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 653:2-4(2007 Sep 20), pp. 151-160.

Search for pentaquarks in the hadronic decays of the Z boson with the DELPHI detector at LEP

J. Abdallah;P. Abreu;W. Adam;P. Adzic;T. Albrecht;R. Alemany Fernandez;T. Allmendinger;P. P. Allport;U. Amaldi;N. Amapane;S. Amato;E. Anashkin;A. Andreazza;S. Andringa;N. Anjos;P. Antilogus;W. D. Apel;Y. Arnoud;S. Ask;B. Asman;J. E. Augustin;A. Augustinus;P. Baillon;A. Ballestrero;P. Bambade;R. Barbier;D. Bardin;G. J. Barker;A. Baroncelli;M. Battaglia;M. Baubillier;K. H. Becks;M. Begalli;A. Behrmann;E. Ben Haim;N. Benekos;A. Benvenuti;C. Berat;M. Berggren;D. Bertrand;M. Besancon;N. Besson;D. Bloch;M. Blom;M. Bluj;M. Bonesini;M. Boonekamp;P. S. L. Booth;G. Borisov;O. Botner;B. Bouquet;T. J. V. Bowcock;I. Boyko;M. Bracko;R. Brenner;E. Brodet;P. Bruckman;J. M. Brunet;B. Buschbeck;P. Buschmann;M. Calvi;T. Camporesi;V. Canale;F. Carena;N. Castro;F. Cavallo;M. Chapkin;P. Charpentier;P. Checchia;R. Chierici;P. Shlyapnikov;J. Chudoba;S. U. Chung;K. Cieslik;P. Collins;R. Contri;G. Cosme;F. Cossutti;M. J. Costa;D. J. Crennell;J. Cuevas Maestro;J. D'Hondt;T. Da Silva;W. Da Silva;G. Della Ricca;A. De Angelis;W. de Boer;C. De Clercq;B. De Lotto;N. De Maria;A. De Min;L. De Paula;L. Di Ciaccio;A. Di Simone;K. Doroba;J. Drees;G. Eigen;T. J. C. Ekelof;M. Ellert;M. Elsing;M. C. Espirito Santo;G. K. Fanourakis;D. Fassouliotis;M. Feindt;J. Fernandez;A. Ferrer;F. Ferro;U. Flagmeyer;H. Foeth;E. Fokitis;F. Fulda Quenzer;J. Fuster;M. Gandelman;C. GarciÂa;P. Gavillet;E. Gazis;R. Gokieli;B. Golob;G. Gomez Ceballos;P. Goncalves;E. Graziani;G. Grosdidier;K. Grzelak;J. Guy;C. Haag;A. Hallgren;K. Hamacher;K. Hamilton;S. Haug;F. Hauler;V. Hedberg;M. Hennecke;H. Herr;J. Hoffman;S. O. Holmgren;P. J. Holt;M. A. Houlden;J. N. Jackson;G. Jarlskog;P. Jarry;D. Jeans;E. K. Johansson;P. Jonsson;C. Joram;L. Jungermann;F. Kapusta;S. Katsanevas;P. Kokkinias;L. Leinonen;E. Katsoufis;G. Kernel;B. P. Kersevan;Z. Krumshtein;T. Lesiak;U. Kerzel;W. Liebig;B. T. King;J. Lamsa;D. Liko;N. J. Kjaer;G. Leder;P. Kluit;C. Kourkoumelis;R. Leitner;O. Kuznetsov;M. Kucharczyk;F. Ledroit;J. H. Lopes;J. Lemonne;V. Lepeltier;A. Lipniacka;J. M. Lopez;D. Loukas;P. Lutz;L. Lyons;J. MacNaughton;A. Malek;S. Maltezos;F. Mandl;J. Marco;R. Marco;B. Marechal;M. Margoni;J. C. Marin;C. Mariotti;A. Markou;C. Martinez Rivero;J. Masik;N. Mastroyiannopoulos;F. Matorras;C. Matteuzzi;F. Mazzucato;M. Mazzucato;R. McNulty;C. Meroni;E. Migliore;W. A. Mitaroff;U. Mjoernmark;T. Moa;M. Moch;K. Moenig;R. Monge;J. Montenegro;D. Moraes;S. Moreno;P. Morettini;U. Mueller;K. Muenich;M. Mulders;L. Mundim;W. Murray;B. Muryn;G. Myatt;T. Myklebust;M. Paganoni;M. Nassiakou;S. Paiano;F. Navarria;K. Nawrocki;R. Nicolaidou;M. Nikolenko;A. Ouraou;C. Parkes;A. Oblakowska Mucha;A. Oyanguren;V. F. Obraztsov;A. Olshevski;J. P. Palacios;A. Onofre;H. Palka;R. Orava;K. Osterberg;L. Pape;T. D. Papadopoulou;F. Parodi;U. Parzefall;A. Passeri;O. Passon;L. Peralta;V. Perepelitsa;A. Perrotta;A. Petrolini;J. Piedra;L. Pieri;F. Pierre;M. Pimenta;E. Piotto;T. Podobnik;V. Poireau;M. E. Pol;G. Polok;V. Pozdnyakov;N. Pukhaeva;A. Pullia;J. Rames;A. Read;P. Rebecchi;J. Rehn;D. Reid;R. Reinhardt;P. B. Renton;F. Richard;J. Ridky;M. Rivero;D. Rodriguez;A. Romero;P. Ronchese;P. Roudeau;T. Rovelli;V. Ruhlmann Kleider;D. Ryabtchikov;A. Sadovskii;L. Salmi;J. Salt;C. Sander;A. Savoy Navarro;U. Schwickerath;R. Sekulin;M. Siebel;A. Sisakian;G. Smadja;O. Smirnova;A. Sokolov;A. Sopczak;R. Sosnowski;T. Spassoff;M. Stanitzki;A. Stocchi;J. Strauss;B. Stugu;M. Szczekowski;M. Szeptycka;T. Szumlak;T. Tabarelli de Fatis;F. Tegenfeldt;J. Timmermans;L. Tkatchev;M. Tobin;S. Todorovova;B. Tome;A. Tonazzo;P. Tortosa;P. Travnicek;D. Treille;G. Tristram;M. Trochimczuk;C. Troncon;M. L. Turluer;I. A. Tyapkin;P. Tyapkin;S. Tzamarias;V. Uvarov;G. Valenti;P. van Dam;J. Van Eldik;N. Van Remortel;I. Van Vulpen;G. Vegni;F. Veloso;W. Venus;P. Verdier;V. Verzi;D. Vilanova;L. Vitale;V. Vrba;H. Wahlen;A. J. Washbrook;C. Weiser;D. Wicke;J. Wickens;G. Wilkinson;M. Winter;M. Witek;O. Yushchenko;A. Zalewska Bak;P. Zalewski;D. Zavrtanik;V. Zhuravlov;N. I. Zimin;A. Zintchenko;M. Zupan

2007

Abstract

The quark model does not exclude states composed of more than three quarks, like pentaquark systems. Controversial evidence for such states has been published in the last years, in particular: for a strange pentaquark Theta(1540)+; for a double-strange state, the Xi(1862)--, subsequently called Phi(1860)--; and for a charmed state, the Theta_c(3100)^0. If confirmed, a full pentaquark family might exist; such pentaquark states could be produced in e+e- annihilations near the Z energy. In this paper a search for pentaquarks is described using the DELPHI detector at LEP, characterized by powerful particle identification sub-systems crucial in the separation of the signal from the background for these states. At 95% CL, upper limits are set on the production rates of such particles and their charge-conjugate state per Z decay: x Br(Theta+ -> pK0_S) < 5.1 x 10^{-4} < 1.6 x 10^{-3} x Br(Phi(1860)-- -> Xi- pi-) < 2.9 x 10^{-4} x Br(Theta_c(3100)^0 -> D*+ pbar) < 8.8 x 10^{-4} .

Scheda breve

Scheda completa

Scheda completa (DC)

	Parole chiave
	
				Physics ; elementary particle physics ; LEP ; standard model
			
	Settori scientifico-disciplinari dell'articolo (sola visualizzazione)
	
				Settore FIS/04 - Fisica Nucleare e Subnucleare
			
	Data di pubblicazione
	
				20-set-2007
			
	Rivista in ANCE
	
				PHYSICS LETTERS. SECTION B
			
	DOI
	
				https://dx.doi.org/10.1016/j.physletb.2007.08.005
			
	Tipologia
	
				Article (author)
			
	Appare nelle tipologie:
	
				01 - Articolo su periodico

File in questo prodotto:

Non ci sono file associati a questo prodotto.

Pubblicazioni consigliate

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/2434/39479

Citazioni

ND

5

6

IRIS Institutional Research Information System - AIR Archivio Istituzionale della Ricerca