Observation and mass measurement of the baryon Xi(-)(b)

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doi:10.1103/PhysRevLett.99.052002

We report the observation and measurement of the mass of the bottom, strange baryon Xi(-)(b) through the decay chain Xi(-)(b)-->J/psi Xi(-), where J/psi-->mu(+)mu(-), Xi(-)-->Lambda pi(-), and Lambda-->p pi(-). A signal is observed whose probability of arising from a background fluctuation is 6.6 x 10(-15), or 7.7 Gaussian standard deviations. The Xi(-)(b) mass is measured to be 5792.9 +/- 2.5(stat) +/- 1.7(syst) MeV/c(2). RI Ruiz, Alberto/E-4473-2011; Robson, Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012; Prokoshin, Fedor/E-2795-2012; Azzi, Patrizia/H-5404-2012; manca, giulia/I-9264-2012

Digital Object Identifier (DOI):	http://dx.doi.org/10.1103/PhysRevLett.99.052002
Codice identificativo ISI:	WOS:000248597500013
Codice identificativo Scopus:	2-s2.0-34547698807
Handle:	http://hdl.handle.net/11695/4930
Abstract:	We report the observation and measurement of the mass of the bottom, strange baryon Xi(-)(b) through the decay chain Xi(-)(b)-->J/psi Xi(-), where J/psi-->mu(+)mu(-), Xi(-)-->Lambda pi(-), and Lambda-->p pi(-). A signal is observed whose probability of arising from a background fluctuation is 6.6 x 10(-15), or 7.7 Gaussian standard deviations. The Xi(-)(b) mass is measured to be 5792.9 +/- 2.5(stat) +/- 1.7(syst) MeV/c(2). RI Ruiz, Alberto/E-4473-2011; Robson, Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012; Prokoshin, Fedor/E-2795-2012; Azzi, Patrizia/H-5404-2012; manca, giulia/I-9264-2012
Titolo:	Observation and mass measurement of the baryon Xi(-)(b)
Autori:	Aaltonen T Abulencia A Adelman J Affolder T Akimoto T Albrow MG Amerio S Amidei D Anastassov A Anikeev K Annovi A Antos J Aoki M Apollinari G Arisawa T Artikov A Ashmanskas W Attal A Aurisano A Azfar F Azzi Bacchetta P Azzurri P Bacchetta N Badgett W Barbaro Galtieri A Barnes VE Barnett BA Baroiant S Bartsch V Bauer G Beauchemin PH Bedeschi F Behari S Bellettini G Bellinger J Belloni A Benjamin D Beretvas A Beringer J Berry T Bhatti A Binkley M Bisello D Bizjak I Blair RE Blocker C Blumenfeld B Bocci A Bodek A Boisvert V Bolla G Bolshov A Bortoletto D Boudreau J Boveia A Brau B Brigliadori L Bromberg C Brubaker E Budagov J Budd HS Budd S Burkett K Busetto G Bussey P Buzatu A Byrum KL Cabrera S Campanelli M Campbell M Canelli F Canepa A Carrillo S Carlsmith D Carosi R Carron S Casal B Casarsa M Castro A Catastini P Cauz D Cavalli Sforza M Cerri A Cerrito L Chang SH Chen YC Chertok M Chiarelli G Chlachidze G Chlebana F Cho I Cho K Chokheli D Chou JP Choudalakis G Chuang SH Chung K Chung WH Chung YS Cilijak M Ciobanu CI Ciocci MA Clark A Clark D Coca M Compostella G Convery ME Conway J Cooper B Copic K Cordelli M Cortiana G Crescioli F Almenar CC Cuevas J Culbertson R Cully JC DaRonco S Datta M D'Auria S Davies T Dagenhart D de Barbaro P De Cecco S Deisher A De Lentdecker G De Lorenzo G Dell'Orso M Paoli FD Demortier L Deng J Deninno M De Pedis D Derwent PF Di Giovanni GP Dionisi C Di Ruzza B Dittmann JR D'Onofrio M Dorr C Donati S Dong P Donini J Dorigo T Dube S Efron J Erbacher R Errede D Errede S Eusebi R Fang HC Farrington S Fedorko I Fedorko WT Feild RG Feindt M Fernandez JP Field R Flanagan G Forrest R Forrester S Franklin M Freeman JC Furic I Gallinaro M Galyardt J Garcia JE Garberson F Garfinkel AF Gay C Gerberich H Gerdes D Giagu S Giannetti P Gibson K Gimmell JL Ginsburg C Giokaris N Giordani M Giromini P Giunta M Giurgiu G Glagolev V Glenzinski D Gold M Goldschmidt N Goldstein J Golossanov A Gomez G Gomez Ceballos G Goncharov M Gonzalez O Gorelov I Goshaw AT Goulianos K Gresele A Grinstein S Grosso Pilcher C Group RC Grundler U da Costa JG Gunay Unalan Z Haber C Hahn K Hahn SR Halkiadakis E Hamilton A Han BY Han JY Handler R Happacher F Hara K Hare D Hare M Harper S Harr RF Harris RM Hartz M Hatakeyama K Hauser J Hays C Heck M Heijboer A Heinemann B Heinrich J Henderson C Herndon M Heuser J Hidas D Hill CS Hirschbuehl D Hocker A Holloway A Hou S Houlden M Hsu SC Huffman BT Hughes RE Husemann U Huston J Incandela J Introzzi G Iori M Ivanov A Iyutin B James E Jang D Jayatilaka B Jeans D Jeon EJ Jindariani S Johnson W Jones M Joo KK Jun SY Jung JE Junk TR Kamon T Karchin PE Kato Y Kemp Y Kephart R Kerzel U Khotilovich V Kilminster B Kim DH Kim HS Kim JE Kim MJ Kim SB Kim SH Kim YK Kimura N Kirsch L Klimenko S Klute M Knuteson B Ko BR Kondo K Kong DJ Konigsberg J Korytov A Kotwal AV Kraan AC Kraus J Kreps M Kroll J Krumnack N Kruse M Krutelyov V Kubo T Kuhlmann SE Kuhr T Kulkarni NP Kusakabe Y Kwang S Laasanen AT Lai S Lami S Lammel S Lancaster M Lander RL Lannon K Lath A Latino G Lazzizzera I LeCompte T Lee J Lee J Lee YJ Lee SW Lefevre R Leonardo N Leone S Levy S Lewis JD Lin C Lin CS Lindgren M Lipeles E Lister A Litvintsev DO Liu T Lockyer NS Loginov A Loreti M Lu RS Lucchesi D Lujan P Lukens P Lungu G Lyons L Lys J Lysak R Lytken E Mack P MacQueen D Madrak R Maeshima K Makhoul K Maki T Maksimovic P Malde S Malik S Manca G Manousakis A Margaroli F Marginean R Marino C Marino CP Martin A Martin M Martin V Martinez M Martinez Ballarin R Maruyama T Mastrandrea P Masubuchi T Matsunaga H Mattson ME Mazini R Mazzanti P McFarland KS McIntyre P McNulty R Mehta A Mehtala P Menzemer S Menzione A Merkel P Mesropian C Messina A Miao T Miladinovic N Miles J Miller R Mills C Milnik M Mitra A Mitselmakher G Miyamoto A Moed S Moggi N Mohr B Moon CS Moore R Morello M Fernandez PM Mulmenstadt J Mukherjee A Muller T Mumford R Murat P Mussini M Nachtman J Nagano A Naganoma J Nakamura K Nakano I Napier A Necula V Neu C Neubauer MS Nielsen J Nodulman L Norniella O Nurse E Oh SH Oh YD Oksuzian I Okusawa T Oldeman R Orava R Osterberg K Pagliarone C Palencia E Papadimitriou V Papaikonomou A Paramonov AA Parks B Pashapour S Patrick J Pauletta G Paulini M Paus C Pellett DE Penzo A Phillips TJ PIACENTINO, Giovanni Maria Piedra J Pinera L Pitts K Plager C Pondrom L Portell X Poukhov O Pounder N Prakoshyn F Pronko A Proudfoot J Ptohos F Punzi G Pursley J Rademacker J Rahaman A Ramakrishnan V Ranjan N Redondo I Reisert B Rekovic V Renton P Rescigno M Richter S Rimondi F Ristori L Robson A Rodrigo T Rogers E Rolli S Roser R Rossi M Rossin R Roy P Ruiz A Russ J Rusu V Saarikko H Safonov A Sakumoto WK Salamanna G Salto O Santi L Sarkar S Sartori L Sato K Savard P Savoy Navarro A Scheidle T Schlabach P Schmidt EE Schmidt MP Schmitt M Schwarz T Scodellaro L Scott AL Scribano A Scuri F Sedov A Seidel S Seiya Y Semenov A Sexton Kennedy L Sfyrla A Shalhout SZ Shapiro MD Shears T Shepard PF Sherman D Shimojima M Shochet M Shon Y Shreyber I Sidoti A Sinervo P Sisakyan A Slaughter AJ Slaunwhite J Sliwa K Smith JR Snider FD Snihur R Soderberg M Soha A Somalwar S Sorin V Spalding J Spinella F Spreitzer T Squillacioti P Stanitzki M Staveris Polykalas A Denis RS Stelzer B Stelzer Chilton O Stentz D Strologas J Stuart D Suh JS Sukhanov A Sun H Suslov I Suzuki T Taffard A Takashima R Takeuchi Y Tanaka R Tecchio M Teng PK Terashi K Thom J Thompson AS Thomson E Tipton P Tiwari V Tkaczyk S Toback D Tokar S Tollefson K Tomura T Tonelli D Torre S Torretta D Tourneur S Trischuk W Tsuno S Tu Y Turini N Ukegawa F Uozumi S Vallecorsa S van Remortel N Varganov A Vataga E Vazquez F Velev G Vellidis C Veramendi G Veszpremi V Vidal M Vidal R Vila I Vilar R Vine T Vogel M Vollrath I Volobouev I Volpi G Wurthwein F Wagner P Wagner RG Wagner RL Wagner J Wagner W Wallny R Wang SM Warburton A Waters D Weinberger M Wester WC Whitehouse B Whiteson D Wicklund AB Wicklund E Williams G Williams HH Wilson P Winer BL Wittich P Wolbers S Wolfe C Wright T Wu X Wynne SM Yagil A Yamamoto K Yamaoka J Yamashita T Yang C Yang UK Yang YC Yao WM Yeh GP Yoh J Yorita K Yoshida T Yu GB Yu I Yu SS Yun JC Zanello L Zanetti A Zaw I Zhang X Zhou J Zucchelli S. mostra contributor esterni nascondi contributor esterni
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