ScienceDirect - Physics Letters B : χc production in hadronic Z decays

Physics Letters B
Volume 317, Issue 3, 11 November 1993, Pages 467-473

Font Size:

Abstract - selected

References

Purchase PDF (500 K)

E-mail Article

Add to my Quick Links

Bookmark and share in 2collab (opens in new window)

Request permission to reuse this article

Cited By in Scopus (11)

Related Articles in ScienceDirect

Measurement of the strong coupling constant [alpha]S fo...
Physics Letters B

Measurement of Ds+/- and Cabibbo-suppressed D+/- decays
Physics Letters B

Inclusive J production in Z0 decays
Physics Letters B

A measurement of [Gamma] (DS+ --> [phi][mu]+[nu]) /[Gam...
Physics Letters B

Measurements of decays and the semileptonic branching ...
Physics Letters B

View More Related Articles

View Record in Scopus

doi:10.1016/0370-2693(93)91026-J

χ_c production in hadronic Z decays

L3 Collaboration, O. Adriani^o, M. Aguilar-Benitez^x, S. Ahlenⁱ, J. Alcaraz^p, A. Aloisio^aa, G. Alverson^j, M. G. Alviggi^aa, G. Ambrosi^af^,^af, Q. An^q, H. Anderhub^au, A. L. Andersonⁿ, V. P. Andreev^aj, T. Angelescu^k, L. Antonov^an, D. Antreasyan^g, P. Arce^x, A. Arefiev^z, A. Atamanchuk^aj, T. Azemoon^c, T. Aziz^h, P. V. K. S. Baba^q, P. Bagnaia^ai, J. A. Bakken^ah, R. C. Ball^c, S. Banerjee^h, J. Bao^e, R. Barillère^p, L. Barone^ai, A. Baschirotto^y, R. Battiston^af, A. Bay^r, F. Becattini^o, J. Bechtluft^a, R. Becker^a, U. Beckerⁿ^,^a^,^t, F. Behner^au, J. Behrens^au, Gy. L. Bencze^l, J. Berdugo^x, P. Bergesⁿ, B. Bertucci^af, B. L. Betev^ao, M. Biasini^af, A. Biland^au, G. M. Bilei^af, R. Bizzarri^ai, J. J. Blaising^d, G. J. Bobbink^p^,^b, R. Bock^a, A. Böhm^a, B. Borgia^ai, M. Bosetti^y, D. Bourilkov^ac, M. Bourquin^r, D. Boutigny^p, B. Bouwens^b, E. Brambilla^aa, J. G. Branson^ak, I. C. Brock^ag, M. Brooks^v, A. Bujak^ar, J. D. Burgerⁿ, W. J. Burger^r, J. Busenitz^ap, A. Buytenhuijs^ac, X. D. Cai^q, M. Capellⁿ, M. Caria^af, G. Carlino^aa, A. M. Cartacci^o, R. Castello^y, M. Cerrada^x, F. Cesaroni^ai, Y. H. Changⁿ, U. K. Chaturvedi^q, M. Chemarin^w, A. Chen^a^,^v, C. Chen^a^,^v, G. Chen^f, G. M. Chen^f, H. F. Chen^s, H. S. Chen^f, M. Chenⁿ, W. Y. Chen^a^,^v, G. Chiefari^aa, C. Y. Chien^e, M. T. Choi^a^,^o, S. Chungⁿ, C. Civinini^o, I. Clareⁿ, R. Clareⁿ, T. E. Coan^v, H. O. Cohn^ad, G. Coignet^d, N. Colino^p, A. Contin^g, S. Costantini^ai, F. Cotorobai^k, X. T. Cui^q, X. Y. Cui^q, T. S. Daiⁿ, R. D'Alessandro^o, R. de Asmundis^aa, A. Degré^d, K. Deiters^as, E. Dénes^l, P. Denes^ah, F. DeNotaristefani^ai, M. Dhina^au, D. DiBitonto^aq, M. Diemoz^ai, H. R. Dimitrov^an, C. Dionisi^ai, M. Dittmar^au, L. Djambazov^au, M. T. Dova^q, E. Drago^aa, D. Duchesneau^r, P. Duinker^b, I. Duran^a, S. Easo^af, H. El Mamouni^w, A. Engler^ag, F. J. Epplingⁿ, F. C. Erné^b, P. Extermann^r, R. Fabbretti^as, M. Fabre^as, S. Falciano^ai, S. J. Fan^am, O. Fackler^u, J. Fay^w, M. Felcini^p, T. Ferguson^ag, D. Fernandez^x, G. Fernandez^x, F. Ferroni^ai, H. Fasefeldt^a, E. Fiandrini^af, J. H. Field^r, F. Filthaut^ac, P. H. Fisher^e, G. Forconi^r, L. Fredj^r, K. Freudenreich^au, W. Friebel^at, M. Fukushimaⁿ, M. Gailloud^t, Yu. Galaktionov^z^,ⁿ, E. Gallo^o, S. N. Ganguli^p^,^h, P. Garcia-Abia^x, D. Gele^w, S. Gentile^ai, N. Gheordanescu^k, S. Giagu^ai, S. Goldfarb^t, Z. F. Gong^s, E. Gonzalez^x, A. Gougas^e, D. Goujon^r, G. Gratta^ae, M. Gruenewald^p, C. Gu^q, M. Guanziroli^q, J. K. Guo^am, V. K. Gupta^ah, A. Gurtu^h, H. R. Gustafson^c, L. J. Gutay^ar, K. Hangarter^a, B. Hartmann^a, A. Hasan^q, D. Hauschildt^b, C. F. He^am, J. T. He^f, T. Hebbeker^p, M. Hebert^ak, A. Hervé^p, K. Hilgers^a, H. Hofer^au, H. Hoorani^r, G. Hu^r, G. Q. Hu^am, B. Ille^w, M. M. Ilyas^q, V. Innocente^p, H. Janssen^p, S. Jezequel^d, B. N. Jin^f, L. W. Jones^c, I. Josa-Mutuberria^p, A. Kasser^t, R. A. Khan^q, Yu. Kamyshkov^ad, P. Kapinos^at^,^aj, J. S. Kapustinsky^v, Y. Karyotakis^p, M. Kaur^p, S. Khokhar^q, M. N. Kienzle-Focacci^r, J. K. Kim^a^,^o, S. C. Kim^a^,^o, Y. G. Kim^a^,^o, W. W. Kinnison^v, A. Kirkby^ae, D. Kirkby^ae, S. Kirsch^at, W. Kittel^ac, A. Klimentovⁿ^,^z, R. Klöckner^a, A. C. König^ac, E. Koffeman^b, O. Kornadt^a, V. Koutsenkoⁿ^,^z, A. Koulbardis^aj, R. W. Kraemer^ag, T. Kramerⁿ, V. R. Krastev^ao, W. Krenz^a, A. Krivshich^aj, H. Kuijten^aj, K. S. Kumar^m, A. Kuninⁿ^,^z, G. Landi^o, D. Lanske^a, S. Lanzano^aa, A. Lebedevⁿ, P. Lebrun^w, P. Lecomte^au, P. Lecoq^p, P. Le Coultre^au, D. M. Lee^v, J. S. Lee^ap, K. Y. Lee^ap, I. Leedom^j, C. Leggett^c, J. M. Le Goff^p, R. Leiste^at, M. Lenti^o, E. Leonardi^ai, C. Li^s^,^q, H. T. Li^f, P. J. Li^am, J. Y. Liao^am, W. T. Lin^a^,^v, Z. Y. Lin^s, F. L. Linde^b, B. Lindemann^a, L. Lista^aa, Y. Liu^q, W. Lohmann^at, E. Longo^ai, Y. S. Lu^f, J. M. Lubbers^p, K. Lübelsmeyer^a, C. Luci^ai, D. Luckey^g^,ⁿ, L. Ludovici^ai, L. Luminari^ai, W. Lustermann^at, J. M. Ma^f, W. G. Ma^s, M. MacDermott^au, R. Malik^q, A. Malinin^z, C. Maña^x, M. Maolinbay^au, P. Marchesini^au, F. Marion^d, A. Marinⁱ, J. P. Martin^w, L. Martinez-Laso^x, F. Marzano^ai, G. G. G. Massaro^b, K. Mazumdar^r, P. McBride^m, T. McMahon^ar, D. McNally^au, M. Merk^ag, L. Merola^aa, M. Meschini^o, W. J. Metzger^ac, Y. Mi^t, A. Mihul^k, G. B. Mills^v, Y. Mir^q, G. Mirabelli^ai, J. Mnich^a, M. Möller^a, B. Monteleoni^o, R. Morand^d, S. Morganti^ai, N. E. Moulai^q, R. Mount^ae, S. Müller^a, A. Nadtochy^aj, E. Nagy^l, M. Napolitano^aa, F. Nessi-Tedaldi^au, H. Newman^ae, C. Neyer^au, M. A. Niaz^q, A. Nippe^a, H. Nowak^at, G. Organtini^ai, D. Pandoulas^a, S. Paoletti^ai, P. Paolucci^aa, G. Pascale^ai, G. Passaleva^o^,^a^,^f, S. Patricelli^aa, T. Paul^e, M. Pauluzzi^af, C. Paus^a, F. Pauss^au, Y. J. Pei^a, S. Pensotti^y, D. Perret-Gallix^d, J. Perrier^r, A. Pevsner^e, D. Piccolo^aa, M. Pieri^p, P. A. Piroué^ah, F. Plasil^ad, V. Plyaskin^z, M. Pohl^au, V. Pojidaev^z^,^o, H. Postemaⁿ, Z. D. Qi^m, J. M. Qian^c, K. N. Qureshi^q, R. Raghavan^h, G. Rahal-Callot^au, P. G. Rancoita^y, M. Rattaggi^y, G. Raven^b, P. Razis^ab, K. Read^ad, D. Ren^au, Z. Ren^q, M. Rescigno^ai, S. Reucroft^j, A. Ricker^a, S. Riemann^at, B. C. Riemers^ar, K. Riles^c, O. Rind^c, H. A. Rizvi^q, S. Ro^ap, F. J. Rodriguez^x, B. P. Roe^c, M. Röhner^a, L. Romero^x, S. Rosier-Lees^d, R. Rosmalen^ac, Ph. Rosselet^t, W. van Rossum^b, S. Roth^a, A. Rubbiaⁿ, J. A. Rubio^p, H. Rykaczewski^au, M. Sachwitz^at, J. Salicio^p, J. M. Salicio^x, G. S. Sanders^v, A. Santocchia^af, M. S. Sarakinosⁿ, G. Sartorelli^g^,^q, M. Sassowsky^a, G. Sauvage^d, V. Schegelsky^aj, D. Schmitz^a, P. Schmitz^a, M. Schneegans^d, H. Schopper^av, D. J. Schotanus^ac, S. Shotkinⁿ, H. J. Schreiber^at, J. Shukla^ag, R. Schulte^a, S. Schulte^a, K. Schultze^a, J. Schwenke^a, G. Schwering^a, C. Sciacca^aa, I. Scott^m, R. Sehgal^q, P. G. Seiler^as, J. C. Sens^p^,^b, L. Servoli^af, I. Sheer^ak, D. Z. Shen^am, S. Shevchenko^ae, X. R. Shi^ae, E. Shumilov^z, V. Shoutko^z, D. Son^ap, A. Sopczak^p, V. Soulimov^aa, C. Spartiotis^e, T. Spickermann^a, P. Spillantini^o, R. Starosta^a, M. Steuer^g^,ⁿ, D. P. Stickland^ah, F. Sticozziⁿ, H. Stone^ah, K. Strauch^m, B. C. Stringfellow^ar, K. Sudhakar^h, G. Sultanov^q, L. Z. Sun^s^,^q, G. F. Susinno^r, H. Suter^au, J. D. Swain^q, A. A. Syed^ac, X. W. Tang^f, L. Taylor^j, G. Terzi^y, Samuel C. C. Tingⁿ, S. M. Tingⁿ, M. Tonutti^a, S. C. Tonwar^h, J. Tóth^l, A. Tsaregorodtsev^aj, G. Tsipolitis^ag, C. Tully^ah, K. L. Tung^f, J. Ulbricht^au, L. Urbán^l, U. Uwer^a, E. Valente^ai, R. T. Van de Walle^ac, I. Vetlitsky^z, G. Viertel^au, P. Vikas^q, U. Vikas^q, M. Vivargent^d, H. Vogel^ag, H. Vogt^at, I. Vorobiev^m^,^z, A. A. Vorobyov^aj, L. Vuilleumier^au, M. Wadhwa^d, W. Wallraff^a, C. Wangⁿ, C. R. Wang^s, X. L. Wang^s, Y. F. Wangⁿ, Z. M. Wang^q^,^s, C. Warner^a, A. Weber^a, J. Weber^au, R. Weill^t, T. J. Wenaus^u, J. Wenninger^r, M. Whiteⁿ, C. Willmott^x, F. Wittgenstein^p, D. Wright^ah, S. X. Wu^q, S. Wynhoff^a, B. Wys ouchⁿ, Y. Y. Xie^am, J. G. Xu^f, Z. Z. Xu^s, Z. L. Xue^am, D. S. Yan^am, B. Z. Yang^s, C. G. Yang^f, G. Yang^q, C. H. Ye^q, J. B. Ye^s, Q. Ye^q, S. C. Yeh^a^,^v, Z. W. Yin^am, J. M. You^q, N. Yunus^q, M. Yzerman^b, C. Zaccardelli^ae, N. Zaitsev^aa, P. Zemp^au, M. Zeng^q, Y. Zeng^a, D. H. Zhang^b, Z. P. Zhang^s^,^q, B. Zhouⁱ, G. J. Zhou^f, J. F. Zhou^a, R. Y. Zhu^ae, A. Zichichi^g^,^p^,^q and B. C. C. van der Zwaan^b

^a I. Physikalisches Institut, RWTH, W-5100, Aachen, FRG ¹ ^b III Physikalisches Institut, RWTH, W-5100, Aachen, FRG¹ ^c National Institute for High Energy Physics, NIKHEF, NL-1009 DB, Amsterdam, The Netherlands ^d University of Michigan, Ann Arbor, MI 48109, USA ^e Laboratoire d'Annecy-le-Vieux de Physique des Particules, LAPP, IN2P3-CNRS, BP 110, F-74941, Annecy-le-Vieux Cedex, France ^f Johns Hopkins University, Baltimore, MD 21218, USA ^g Institute of High Energy Physics, IHEP, 100039, Beijing, China ^h INFN - Sezione di Bologna, I-40126, Bologna, Italy ⁱ Tata Institute of Fundamental Research, Bombay 400 005, India ^j Boston University, Boston, MA 02215, USA ^k Northeastern University, Boston, MA 02115, USA ^l Institute of Atomic Physics and University of Bucharest, R-76900, Bucharest, Romania ^m Central Research Institute for Physics of the Hungarian Academy of Sciences, H-1525, Budapest 114, Hungary ² ⁿ Harvard University, Cambridge, MA 02139, USA ^o Massachusetts Institute of Technology, Cambridge, MA 02139, USA ^p INFN - Sezione di Firenze and University of Florence, I-50125, Florence, Italy ^q European Laboratory for Particle Physics, CERN, CH-1211, Geneva 23, Switzerland ^r World Laboratory, FBLJA Project, CH-1211, Geneva 23, Switzerland ^s University of Geneva, CH-1211, Geneva 4, Switzerland ^t Chinese University of Science and Technology, USTC, Hefei, Anhui 230 029, China ^u University of Lausanne, CH-1015, Lausanne, Switzerland ^v Lawrence Livermore National Laboratory, Livermore, CA 94550, USA ^w Los Alamos National Laboratory, Los Alamos, NM 87544, USA ^x Institut de Physique Nucléaire de Lyon, IN2P3-CNRS, Université Claude Bernard, F-69622, Villeurbanne Cedex, France ^y Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas, CIEMAT, E-28040, Madrid, Spain ^z INFN - Sezione di Milano, I-20133, Milan, Italy ^aa Institute of Theoretical and Experimental Physics, ITEP, Moscow, Russia ^ab INFN - Sezione di Napoli and University of Naples, I-80125, Naples, Italy ^ac Department of Natural Sciences, University of Cyprus, Nicosia, Cyprus ^ac University of Nymegen and NIKHEF, NL-6525 ED, Nymegen, The Netherlands ^ad Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA ^ae California Institute of Technology, Pasadena, CA 91125, USA ^af INFN-Sezione di Perugia and Università Degli Studi di Perugia, I-06100, Perugia, Italy ^ag Carnegie Mellon University, Pittsburgh, PA 15213, USA ^ah Princeton University, Princeton, NJ 08544, USA ^ai INFN-Sezione di Roma and University of Rome, “La Sapienza”, I-00185, Rome, Italy ^aj Nuclear Physics Institute, St. Petersburg, Russia ^ak University of California, San Diego, CA 92093, USA ^a Departamento de Fisica de Particulas Elementales, Universidad de Santiago, E-15706, Santiago de Compostela, Spain ^am Shanghai Institute of Ceramics, SIC, Shanghai, China ^an Bulgarian Academy of Sciences, Institute of Mechatronics, BU-1113, Sofia, Bulgaria ^ao Center for High Energy Physics, Korea Advanced Institute of Sciences and Technology, 305-701, Taejon, South Korea ^ap University of Alabama, Tuscaloosa, AL 35486, USA ^aq Purdue University, West Lafayette, IN 47907, USA ^ar Paul Scherrer Institut, PSI, CH-5232, Villigen, Switzerland ^as DESY-Institut für Hochenergiephysik, O-1615, Zeuthen, FRG ^at Eidgenössische Technische Hochschule, ETH Zürich, CH-8093, Zürich, Switzerland ^au University of Hamburg, W-2000, Hamburg, FRG ^av High Energy Physics Group, Taiwan, ROC

Received 24 August 1993.

Editor: K. Winter

Available online 24 October 2002.

References and further reading may be available for this article. To view references and further reading you must purchase this article.

Abstract

We report on inclusive x_c production in Z decays reconstructed via the decay mode X_c → J + γ. This analysis is based on 1.1 million hadronic Z events. Interpreting the observed signal as X_cl, we obtain a branching ratio Br(Z→ X_cl + X) = (7.5±2.9(stat.) ±0.6(sys.)) × 10⁻³. Assuming all events are produced in b decays we obtain Br(b→ X_cl + X) = (2.4 ± 0.9(stat.) ±0.2(sys.)) × 10⁻². We also present an improved measurement of the branching ratio Br(Z → J + X) = (3.6 ± 0.5 (stat.) ± 0.4 (sys.)) × 10⁻³, obtained from dileptonic J decays.

Article Outline

• References

Physics Letters B
Volume 317, Issue 3, 11 November 1993, Pages 467-473

About ScienceDirect | Contact Us | Information for Advertisers | Terms & Conditions | Privacy Policy