Search for particles with unexpected mass and charge in Z decays

6533b82efe1ef96bd12929a6

RESEARCH PRODUCT

Search for particles with unexpected mass and charge in Z decays

Damir Buskulic J Schwindling D Décamp C Goy J P Lees M N Minard B Mours R Alemany F Ariztizabal P Comas J M Crespo M C Delfino E Fernández V Gaitan L Garrido T S Mattison A Pacheco C Padilla A Pascual D Creanza M De Palma A Farilla Giuseppe Iaselli G Maggi M Maggi S Natali S Nuzzo M Quattromini A Ranieri G Raso F Romano F Ruggieri G Selvaggi L Silvestris P Tempesta G Zito H Hu D Huang X Huang J Lin J Lou C Qiao T Wang Y Xie D Xu R Xu J Zhang W Zhao L A T Bauerdick E Blucher G Bonvicini J Boudreau David William Casper H Drevermann Roger W Forty G Ganis C Gay R Hagelberg J Harvey S Haywood J M Hilgart R Jacobsen B Jost J Knobloch E Lançon Ivan Lehraus T Lohse A Lusiani M Martínez P Mato H Meinhard Adolf G Minten R Miquel H G Moser P Palazzi J A Perlas J F Pusztaszeri F Ranjard G Redlinger Luigi Rolandi J E Rothberg T Ruan M Saich W D Schlatter M Schmelling F Sefkow W Tejessy H W Wachsmuth W Wiedenmann T Wildish W Witzeling J Wotschack Ziad J Ajaltouni F Badaud Maria Bardadin-otwinowska A M Bencheikh R El-fellous A Falvard P Gay C Guicheney P Henrard J Jousset B Michel J C Montret D Pallin P Perret B Pietrzyk J Proriol F Prulhière G Stimpfl Tom Fearnley J D Hansen J R Hansen P H Hansen R Møllerud B S Nilsson I Efthymiopoulos A Kyriakis Errietta Simopoulou Anna Vayaki K Zachariadou J Badier A Blondel G R Bonneaud J C Brient G Fouque S Orteu A Rougé M Rumpf R Tanaka M Verderi H L Videau D J Candlin M I Parsons E Veitch L Moneta G Parrini M Corden C H Georgiopoulos M Ikeda J E Lannutti D A Levinthal Michael E Mermikides L Sawyer S R Wasserbaech A Antonelli R Baldini G Bencivenni G Bologna F Bossi P Campana G Capon F Cerutti V Chiarella B D'ettorre-piazzoli G Felici P Laurelli G Mannocchi F Murtas G P Murtas L Passalacqua M Pepé-altarelli P Picchi P Colrain I Ten Have J G Lynch W J Maitland W T Morton C Raine J M Scarr K Smith M G Smith A S Thompson R M Turnbull B Brandl O Braun C Geweniger P Hanke V Hepp E E Kluge Y Maumary A Putzer B Rensch A Stahl K Tittel M Wunsch A T Belk R Beuselinck David M Binnie W Cameron M Cattaneo D J Colling Peter J Dornan S Dugeay A M Greene J F Hassard N M Lieske J Nash S J Patton D G Payne M J Phillips J K Sedgbeer I R Tomalin A G Wright E Kneringer D Kuhn G Rudolph C K Bowdery T J Brodbeck A J Finch F Foster G Hughes D Jackson N R Keemer M Nuttall A D Patel Terence Sloan S W Snow E P Whelan K Kleinknecht J Raab B Renk H G Sander H Schmidt F Steeg S M Walther R Wanke B Wolf Jean-jacques Aubert C Benchouk A Bonissent J Carr P Coyle J Drinkard F Etienne S Papalexiou P Payre Z Qian L Roos D Rousseau P Schwemling M Talby S Adlung R W Assmann C Bauer Walter Blum D Brown Paolo Walter Cattaneo Bernd Dehning H Dietl Friedrich Dydak M Fernández-bosman M Frank A W Halley J Lauber G Lütjens Gerhard Lutz W Männer R H Richter Herbert Rotscheidt J Schröder A S Schwarz Ronald Settles H C J Seywerd U Stierlin U Stiegler R Saint-denis M Takashima J Thomas G Wolf J Boucrot O Callot A Cordier M Davier L Duflot J F Grivaz P Heusse D E Jaffe P Janot D W Kim F R Le Diberder J Lefrançois A M Lutz M H Schune J J Veillet I Videau Z Zhang D Abbaneo S R Amendolia G Bagliesi G Batignani L Bosisio U Bottigli C Bozzi C Bradaschia M Carpinelli M A Ciocci R Dell'orso I Ferrante F Fidecaro L Foà E Focardi F Forti A Giassi M A Giorgi F Ligabue E B Mannelli P S Marrocchesi A Messineo Fabrizio Palla G Rizzo G Sanguinetti P Spagnolo Jack Steinberger Roberto Tenchini G Tonelli G Triggiani C Vannini A Venturi P G Verdini J Walsh A P Betteridge J M Carter M G Green P V March L M Mir T Medcalf I S Quazi J A Strong L R West David R Botterill R W Clifft T R Edgecock M Edwards S M Fisher T J Jones P R Norton D P Salmon J C Thompson B Bloch-devaux P Colas H Duarte Witold Kozanecki M C Lemaire E Locci E Monnier P Pérez F Perrier J Rander J F Renardy A Rosowsky A Roussarie J P Schuller D Si Mohand B Vallage R P Johnson A M Litke G Taylor J Wear John Gavin Ashman W Babbage C N Booth C M Buttar R E Carney S L Cartwright F Combley F Hatfield P Reeves L F Thompson E Barbiero A Böhrer S Brandt G D Cowan Claus Grupen G Lutters F Rivera U Schäfer R Della Marina G Giannini B Gobbo F Ragusa L Bellantoni W Chen D Cinabro J S Conway D F Cowen Z Feng D P S Ferguson Y S Gao J Grahl J L Harton R C Jared B W Leclaire C Lishka A Miotto Pan Yi Bin J R Pater Y Saadi V Sharma M Schmitt Z H Shi A M Walsh F V Weber M H Whitney Wu Sau Lan X Wu G Zobernig

subject

Nuclear and High Energy Physics Particle physics Aleph Electron–positron annihilation Hadron Tracking (particle physics)01 natural sciences law.invention ALEPH Experiment Nuclear physics law 0103 physical sciences [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Nuclear Experiment 010306 general physics Collider Physics Luminosity (scattering theory)010308 nuclear & particles physics Physics lcsh:QC1-999 Charged particle Pair production High Energy Physics::Experiment lcsh:Physics Particle Physics - Experiment

description

During 1989 and 1990 over 180 000 hadronic and leptonic events, corresponding to 8 pb-1 of luminosity, were collected by the ALEPH detector in a scan of the Z peak at the e+e- collider LEP. This letter reports the results of a search in these data for particles with unexpected mass and charge by measurement of the ionization energy loss of charged tracks in the ALEPH TPC central tracking detector. The mass limits for the pair production of fractionally charged particles and of heavy, long lived charged particles are extended to 43 GeV/c2 at 90% confidence level. If single production of a heavy particle is considered, the mass limit is extended to more than 70 GeV/c2. RI Perrier, Frederic/A-5953-2011; ANTONELLI, ANTONELLA/C-6238-2011; Buttar, Craig/D-3706-2011; Stahl, Achim/E-8846-2011; Passalacqua, Luca/F-5127-2011; Murtas, Fabrizio/B-5729-2012; St.Denis, Richard/C-8997-2012; Forti, Francesco/H-3035-2011; Ferrante, Isidoro/F-1017-2012

year	journal	country	edition	language
1993-04-01

http://hal.in2p3.fr/in2p3-00004633/document