在质心能量√s = 1.96 TeV的质子-质子碰撞中测量σ(Λb0)/σ(B0)×B(Λb0→Λc+π-)/B(B0→D+π-) 。
Measurement of sigma Lambda b0/sigma B0 x B(Lambda b0-->Lambda c+pi-)/B(B0-->D+pi-) in pp collisions at square root s=1.96 TeV.
作者信息
Abulencia A, Adelman J, Affolder T, Akimoto T, Albrow M G, Ambrose D, Amerio S, Amidei D, Anastassov A, Anikeev K, Annovi A, Antos J, Aoki M, Apollinari G, Arguin J-F, Arisawa T, Artikov A, Ashmanskas W, Attal A, Azfar F, Azzi-Bacchetta P, Azzurri P, Bacchetta N, Badgett W, Barbaro-Galtieri A, Barnes V E, Barnett B A, Baroiant S, Bartsch V, Bauer G, Bedeschi F, Behari S, Belforte S, Bellettini G, Bellinger J, Belloni A, Benjamin D, Beretvas A, Beringer J, Berry T, Bhatti A, Binkley M, Bisello D, Blair R E, 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 H S, Budd S, Budroni S, Burkett K, Busetto G, Bussey P, Byrum K L, Cabrera S, Campanelli M, Campbell M, Canelli F, Canepa A, Carillo S, Carlsmith D, Carosi R, Casarsa M, Castro A, Catastini P, Cauz D, Cavalli-Sforza M, Cerri A, Cerrito L, Chang S H, Chen Y C, Chertok M, Chiarelli G, Chlachidze G, Chlebana F, Cho I, Cho K, Chokheli D, Chou J P, Choudalakis G, Chuang S H, Chung K, Chung W H, Chung Y S, Ciljak M, Ciobanu C I, Ciocci M A, Clark A, Clark D, Coca M, Compostella G, Convery M E, Conway J, Cooper B, Copic K, Cordelli M, Cortiana G, Crescioli F, Cuenca Almenar C, Cuevas J, Culbertson R, Cully J C, Cyr D, DaRonco S, D'Auria S, Davies T, D'Onofrio M, Dagenhart D, de Barbaro P, De Cecco S, Deisher A, De Lentdecker G, Dell'Orso M, Delli Paoli F, Demortier L, Deng J, Deninno M, De Pedis D, Derwent P F, Di Giovanni G P, Dionisi C, Di Ruzza B, Dittmann J R, DiTuro P, Dörr C, Donati S, Donega M, Dong P, Donini J, Dorigo T, Dube S, Efron J, Erbacher R, Errede D, Errede S, Eusebi R, Fang H C, Farrington S, Fedorko I, Fedorko W T, Feild R G, Feindt M, Fernandez J P, Field R, Flanagan G, Foland A, Forrester S, Foster G W, Franklin M, Freeman J C, Furic I, Gallinaro M, Galyardt J, Garcia J E, Garberson F, Garfinkel A F, Gay C, Gerberich H, Gerdes D, Giagu S, Giannetti P, Gibson A, Gibson K, Gimmell J L, Ginsburg C, Giokaris N, Giordani M, Giromini P, Giunta M, Giurgiu G, Glagolev V, Glenzinski D, Gold M, Goldschmidt N, Goldstein J, Gomez G, Gomez-Ceballos G, Goncharov M, González O, Gorelov I, Goshaw A T, Goulianos K, Gresele A, Griffiths M, Grinstein S, Grosso-Pilcher C, Group R C, Grundler U, Guimaraes da Costa J, Gunay-Unalan Z, Haber C, Hahn K, Hahn S R, Halkiadakis E, Hamilton A, Han B-Y, Han J Y, Handler R, Happacher F, Hara K, Hare M, Harper S, Harr R F, Harris R M, Hartz M, Hatakeyama K, Hauser J, Heijboer A, Heinemann B, Heinrich J, Henderson C, Herndon M, Heuser J, Hidas D, Hill C S, Hirschbuehl D, Hocker A, Holloway A, Hou S, Houlden M, Hsu S-C, Huffman B T, Hughes R E, Husemann U, Huston J, Incandela J, Introzzi G, Iori M, Ishizawa Y, Ivanov A, Iyutin B, James E, Jang D, Jayatilaka B, Jeans D, Jensen H, Jeon E J, Jindariani S, Jones M, Joo K K, Jun S Y, Jung J E, Junk T R, Kamon T, Karchin P E, Kato Y, Kemp Y, Kephart R, Kerzel U, Khotilovich V, Kilminster B, Kim D H, Kim H S, Kim J E, Kim M J, Kim S B, Kim S H, Kim Y K, Kimura N, Kirsch L, Klimenko S, Klute M, Knuteson B, Ko B R, Kondo K, Kong D J, Konigsberg J, Korytov A, Kotwal A V, Kovalev A, Kraan A C, Kraus J, Kravchenko I, Kreps M, Kroll J, Krumnack N, Kruse M, Krutelyov V, Kubo T, Kuhlmann S E, Kuhr T, Kusakabe Y, Kwang S, Laasanen A T, Lai S, Lami S, Lammel S, Lancaster M, Lander R L, Lannon K, Lath A, Latino G, Lazzizzera I, Le Y, LeCompte T, Lee J, Lee J, Lee Y J, Lee S W, Lefèvre R, Leonardo N, Leone S, Levy S, Lewis J D, Lin C, Lin C S, Lindgren M, Lipeles E, Lister A, Litvintsev D O, Liu T, Lockyer N S, Loginov A, Loreti M, Loverre P, Lu R-S, 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, Manca G, Margaroli F, Marginean R, Marino C, Marino C P, Martin A, Martin M, Martin V, Martínez M, Maruyama T, Mastrandrea P, Masubuchi T, Matsunaga H, Mattson M E, Mazini R, Mazzanti P, McFarland K S, 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, Moore R, Morello M, Movilla Fernandez P, Mülmenstädt J, Mukherjee A, Muller Th, Mumford R, Murat P, Nachtman J, Nagano A, Naganoma J, Nakano I, Napier A, Necula V, Neu C, Neubauer M S, Nielsen J, Nigmanov T, Nodulman L, Norniella O, Nurse E, Oh S H, Oh Y D, Oksuzian I, Okusawa T, Oldeman R, Orava R, Osterberg K, Pagliarone C, Palencia E, Papadimitriou V, Paramonov A A, Parks B, Pashapour S, Patrick J, Pauletta G, Paulini M, Paus C, Pellett D E, Penzo A, Phillips T J, Piacentino G, 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, Ranjan N, Rappoccio S, 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, Ruiz A, Russ J, Rusu V, Saarikko H, Sabik S, Safonov A, Sakumoto W K, Salamanna G, Saltó O, Saltzberg D, Sánchez C, Santi L, Sarkar S, Sartori L, Sato K, Savard P, Savoy-Navarro A, Scheidle T, Schlabach P, Schmidt E E, Schmidt M P, Schmitt M, Schwarz T, Scodellaro L, Scott A L, Scribano A, Scuri F, Sedov A, Seidel S, Seiya Y, Semenov A, Sexton-Kennedy L, Sfyrla A, Shapiro M D, Shears T, Shepard P F, Sherman D, Shimojima M, Shochet M, Shon Y, Shreyber I, Sidoti A, Sinervo P, Sisakyan A, Sjolin J, Slaughter A J, Slaunwhite J, Sliwa K, Smith J R, Snider F D, Snihur R, Soderberg M, Soha A, Somalwar S, Sorin V, Spalding J, Spinella F, Spreitzer T, Squillacioti P, Stanitzki M, Staveris-Polykalas A, St Denis R, Stelzer B, Stelzer-Chilton O, Stentz D, Strologas J, Stuart D, Suh J S, Sukhanov A, Sun H, Suzuki T, Taffard A, Takashima R, Takeuchi Y, Takikawa K, Tanaka M, Tanaka R, Tecchio M, Teng P K, Terashi K, Thom J, Thompson A S, 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, Tseng J, Tsuchiya R, Tsuno S, Turini N, Ukegawa F, Unverhau T, Uozumi S, Usynin D, Vallecorsa S, van Remortel N, Varganov A, Vataga E, Vázquez F, Velev G, Veramendi G, Veszpremi V, Vidal R, Vila I, Vilar R, Vine T, Vollrath I, Volobouev I, Volpi G, Würthwein F, Wagner P, Wagner R G, Wagner R L, Wagner J, Wagner W, Wallny R, Wang S M, Warburton A, Waschke S, Waters D, Wester W C, Whitehouse B, Whiteson D, Wicklund A B, Wicklund E, Williams G, Williams H H, Wilson P, Winer B L, Wittich P, Wolbers S, Wolfe C, Wright T, Wu X, Wynne S M, Yagil A, Yamamoto K, Yamaoka J, Yamashita T, Yang C, Yang U K, Yang Y C, Yao W M, Yeh G P, Yoh J, Yorita K, Yoshida T, Yu G B, Yu I, Yu S S, Yun J C, Zanello L, Zanetti A, Zaw I, Zhang X, Zhou J, Zucchelli S
机构信息
University of Illinois, Urbana, Illinois 61801, USA.
出版信息
Phys Rev Lett. 2007 Mar 23;98(12):122002. doi: 10.1103/PhysRevLett.98.122002. Epub 2007 Mar 19.
We present the first observation of the baryon decay Lambda b0-->Lambda c+pi- followed by Lambda c+-->pK-pi+ in 106 pb-1 pp collisions at square root s=1.96 TeV in the CDF experiment. In order to reduce systematic error, the measured rate for Lambda b0 decay is normalized to the kinematically similar meson decay B0-->D+pi- followed by D+-->pi+K-pi+. We report the ratio of production cross sections (sigma) times the ratio of branching fractions (B) for the momentum region integrated above pT>6 GeV/c and pseudorapidity range |eta|<1.3: sigma(pp-->Lambda b0X)/sigma(pp-->B0X)xB(Lambda b0-->Lambda c+pi-)/B(B0-->D+pi-)=0.82+/-0.08(stat)+/-0.11(syst)+/-0.22[B(Lambda c+-->pK-pi+)].
我们展示了在CDF实验中，质心能量√s = 1.96 TeV的106 pb⁻¹质子-质子碰撞中，首次观测到重子衰变Λb⁰→Λc⁺π⁻，随后是Λc⁺→pK⁻π⁺。为了降低系统误差，将测量得到的Λb⁰衰变率归一化为运动学上相似的介子衰变B⁰→D⁺π⁻，随后是D⁺→π⁺K⁻π⁺。我们报告了在pT > 6 GeV/c以上积分的动量区域和|η| < 1.3的赝快度范围内，产生截面（σ）乘以分支比（B）的比值：σ(pp→Λb⁰X)/σ(pp→B⁰X)×B(Λb⁰→Λc⁺π⁻)/B(B⁰→D⁺π⁻)=0.82±0.08（统计）±0.11（系统）±0.22[B(Λc⁺→pK⁻π⁺)] 。
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