Photon events with missing energy at root s=183 to 189 GeV

6533b828fe1ef96bd128835c

RESEARCH PRODUCT

Photon events with missing energy at root s=183 to 189 GeV

P Abreau W Adam T Adye P Adzic I Ajinenko Z Albrecht T Alderweireld Gd Alekseev R Alemany T Allmendinger Pp Allport S Almehed U Amaldi N Amapane S Amato Eg Anassontzis P Andersson A Andreazza S Andringa P Antilogus Wd Apel Y Arnoud B Asman Je Augustin A Augustinus P Baillon P Bambade F Barao G Barbiellini R Barbier Dy Bardin G Barker A Baroncelli M Battaglia M Baubillier Kh Becks M Begalli A Behrmann P Beilliere Y Belokopytov Nc Benekos Ac Benvenuti C Berat M Berggren D Bertrand M Besancon M Bigi Ms Bilenky Ma Bizouard D Bloch Hm Blom M Bonesini M Boonekamp Psl Booth Aw Borgland G Borisov C Bosio O Botner E Boudinov B Bouquet C Bourdarios Tjv Bowcock I Boyko I Bozovic M Bozzo M Bracko P Branchini Ra Brenner P Bruckman Jm Brunet L Bugge T Buran B Buschbeck P Buschmann S Cabrera M Caccia M Calvi T Camporesi V Canale F Carena L Carroll C Caso Mvc Gimenez A Cattai Fr Cavallo V Chabaud P Charpentier P Checchia Ga Chelkov R Chierici P Chliapnikov P Chochula V Chorowicz J Chudoba K Cieslik P Collins R Contri E Cortina G Cosme F Cossutti Hb Crawley D Crennell S Crepe G Crosetti Jc Maestro S Czellar M Davenport W Da Silva G Della Ricca P Delpierre N Demaria A De Angelis W De Boer C De Clercq B De Lotto A De Min L De Paula H Dijkstra L Di Ciaccio J Dolbeau K Doroba M Dracos J Drees M Dris A Duperrin Jd Durand G Eigen T Ekelof G Ekspong M Ellert M Elsing Jp Engel Me Santo E Falk G Fanourakis D Fassouliotis J Fayot M Feindt P Ferrari A Ferrer E Ferrer-ribas F Ferro S Fichet A Firestone U Flagmeyer H Foeth E Fokitis F Fontanelli B Franek Ag Frodesen R Fruhwirth F Fulda-quenzer J Fuster A Galloni D Gamba S Gamblin M Gandelman C Garcia C Gaspar M Gaspar U Gasparini P Gavillet En Gazis D Gele L Gerdyukov N Ghodbane I Gil F Glege R Gokieli B Golob G Gomez-ceballos P Goncalves Ig Caballero G Gopal L Gorn Y Gouz V Gracco J Grahl E Graziani P Gris G Grosdidier K Grzelak J Guy C Haag F Hahn S Hahn S Haider A Hallgren K Hamacher J Hansen Fj Harris V Hedberg S Heising Jj Hernandez P Herquet H Herr Tl Hessing Jm Heuser E Higon So Holmgren Pj Holt S Hoorelbeke M Houlden J Hrubec M Huber K Huet Gj Hughes K Hultqvist Jn Jackson R Jacobsson P Jalocha R Janik C Jarlskog G Jarlskog P Jarry B Jean-marie D Jeans Ek Johansson P Jonsson C Joran P Juillot L Jungermann F Kapusta K Karafasoulis S Katsanevas Ec Katsoufis R Keranen G Kernel Bp Kersevan Y Khokhlov Ba Khomenko Nn Khovanski A Kiiskinen B King A Kinvig Nj Kjaer O Klapp H Klein P Kluit P Kokkinias V Kostioukhine C Kourkoumelis O Kouznetsov M Krammer E Kriznic Z Krumstein P Kubinec J Kurowska K Kurvinen Jw Lamsa Dw Lane V Lapin Jp Laugier R Lauhakangas G Leder F Ledroit V Lefebure L Leinonen A Leisos R Leitner J Lemonne G Lenzen V Lepeltier T Lesiak M Letuillier J Libby W Liebig D Liko A Lipniacka I Lippi B Loerstad Jg Loken Jh Lopes Jm Lopez R Lopez-fernandez D Loukas P Lutz L Lyons J Macnaughton Jr Mahon A Maio A Malek Tgm Malmgren S Maltezos V Malychev F Mandl J Marco R Marco B Marechal M Margoni Jc Marin C Mariotti A Markou C Martinez-rivero F Martinez-vidal Smi Garcia J Masik N Mastroyiannopoulos F Matorras C Matteuzzi G Matthiae F Mazzucato M Mazzucato M Mccubbin R Mc Kay R Mc Nulty G Mc Pherson C Meroni Wt Meyer E Migliore L Mirabito Wa Mitaroff U Mjoernmark T Moa M Moch R Moeller K Moenig Mr Monge D Moraes X Moreau P Morettini G Morton U Mueller K Muenich M Mulders C Mulet-marquis R Muresan Wj Murray B Muryn G Myatt T Myklebust F Naraghi M Nassiakou Fl Navarria S Navas K Nawrocki P Negri N Neufeld R Nicolaidou Bs Nielsen P Niezurawski R Nikolenko V Nomokonov A Nygren V Obraztsov Ag Olshevski A Onofre R Orava G Orazi K Osterberg A Ouraou M Paganoni S Paiano R Pain R Paiva J Palacios H Palka Td Papadopoulou K Papageorgiou L Pape C Parkes F Parodi U Parzefall A Passeri O Passon T Pavel M Pegoraro L Peralta M Pernicka A Perrotta C Petridou A Petrolini Ht Phillips F Pierre M Pimenta E Piotto T Podobnik Me Pol G Polok P Poropat V Pozdniakov P Privitera N Pukhaeva A Pullia D Radojicic S Ragazzi H Rahmani J Rames Pn Ratoff Al Read P Rebecchi Ng Redaelli M Regler J Rehn D Reid R Reinhardt Pb Renton Lk Resvanis F Richard J Ridky G Rinaudo I Ripp-baudot O Rohne A Romero P Ronchese Ei Rosenberg P Rosinsky P Roudeau T Rovelli C Royon V Ruhlmann-kleider A Ruiz H Saarikko Y Sacquin A Sadovsky G Sajot J Salt D Sampsonidis M Sannino P Schwemling B Schwering U Schwickerath F Scuri P Seager Y Sedykh Am Segar N Seibert R Sekulin Rc Shellard M Siebel L Simard F Simonetto An Sisakian G Smadja N Smirnov O Smirnova Gr Smith A Sokolov A Sopczak R Sosnowski T Spassov E Spiriti S Squarcia C Stanescu S Stanic M Stanitzki K Stevenson A Stocchi J Strauss R Strub B Stugu M Szczekowski M Szeptycka T Tabarelli A Taffard F Tegenfeldt F Terranova J Thomas J Timmermans N Tinti Lg Tkatchev M Tobin S Todorova A Tomaradze B Tome A Tonazzo L Tortora P Tortosa G Transtromer D Treille G Tristram M Trochimczuk C Troncon Ml Turluer Ia Tyapkin S Tzamarias O Ullaland V Uvarov G Valenti E Vallazza P Van Dam W Van Den Boeck J Van Eldik A Van Lysebetten N Van Remortel I Van Vulpen G Vegni L Ventura W Venus F Verbeure P Verdier M Verlato Ls Vertogradov V Verzi D Vilanova L Vitale E Vlasov As Vodopyanov G Voulgaris V Vrba H Wahlen C Walck Aj Washbrook C Weiser D Wicke Jh Wickens Gr Wilkinson M Winter M Witek G Wolf J Yi O Yushchenko A Zalewska P Zalewski D Zavrtanik E Zevgolatakos Ni Zimin A Zintchenko P Zoller Gc Zucchelli G Zumerle Delphi Collaboration

subject

NEUTRALINOS Particle physics DIMENSIONS Photon Physics and Astronomy (miscellaneous)Physics beyond the Standard Model Astrophysics::High Energy Astrophysical Phenomena STANDARD MODEL FOS: Physical sciences Scale (descriptive set theory)7. Clean energy 01 natural sciences Partícules (Física nuclear)Standard Model High Energy Physics - Experiment Gravitation High Energy Physics - Experiment (hep-ex)E(+)E(-) COLLISIONS SIGNALS SEARCH 0103 physical sciences [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]010306 general physics Nuclear Experiment Engineering (miscellaneous)DELPHI Physics Missing energy 010308 nuclear & particles physics SUPERLIGHT GRAVITINO LEP LARGE ELECTRON POSITRON COLLIDER SINGLE-PHOTON COLLIDERS PARTICLE PHYSICS; LARGE ELECTRON POSITRON COLLIDER; DELPHI PARTICLE PHYSICS Production (computer science)Física nuclear High Energy Physics::Experiment Neutrino E(+)E(-) COLLISIONS; SUPERLIGHT GRAVITINO; STANDARD MODEL; SINGLE-PHOTON; COLLIDERS; SEARCH; LEP; NEUTRALINOS; DIMENSIONS; SIGNALS Particle Physics - Experiment

description

The production of single photons has been studied in the reaction e+e- -> gamma + invisible particles at centre-of-mass energies of 183 GeV and 189 GeV. A previously published analysis of events with multi-photon final states accompanied by missing energy has been updated with 189 GeV data. The data were collected with the DELPHI detector and correspond to integrated luminosities of about 51 pb^{-1} and 158 pb^{-1} at the two energies. The number of light neutrino families is measured to be 2.84 +/- 0.15(stat) +/- 0.14(syst). The absence of an excess of events beyond that expected from Standard Model processes is used to set limits on new physics as described by supersymmetric and composite models. A limit on the gravitational scale is also determined.

year	journal	country	edition	language
2000-01-01

10.1007/s100520000434 http://hdl.handle.net/11588/466378