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Measurements of Angular Distributions of Muons From Upsilon Meson Decays in p p-bar Collisions at sqrt(s)=1.96 TeV

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arxiv 1112.1591 v2 pith:W4BHIDF7 submitted 2011-12-07 hep-ex

Measurements of Angular Distributions of Muons From Upsilon Meson Decays in p p-bar Collisions at sqrt(s)=1.96 TeV

T. Aaltonen , B. \'Alvarez Gonz\'alezz , S. Amerio , D. Amidei , A. Anastassovx , A. Annovi , J. Antos , G. Apollinari
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J.A. Appel T. Arisawa A. Artikov J. Asaadi W. Ashmanskas B. Auerbach A. Aurisano F. Azfar W. Badgett T. Bae A. Barbaro-Galtieri V.E. Barnes B.A. Barnett P. Barriahh P. Bartos M. Bauceff F. Bedeschi S. Behari G. Bellettinigg J. Bellinger D. Benjamin A. Beretvas A. Bhatti D. Biselloff I. Bizjak K.R. Bland B. Blumenfeld A. Bocci A. Bodek D. Bortoletto J. Boudreau A. Boveia L. Brigliadoriee C. Bromberg E. Brucken J. Budagov H.S. Budd K. Burkett G. Busettoff P. Bussey A. Buzatu A. Calamba C. Calancha S. Camarda M. Campanelli M. Campbell F. Canelli B. Carls D. Carlsmith R. Carosi S. Carrillom S. Carron B. Casalk M. Casarsa A. Castroee P. Catastini D. Cauz V. Cavaliere M. Cavalli-Sforza A. Cerrif L. Cerritos Y.C. Chen M. Chertok G. Chiarelli G. Chlachidze F. Chlebana K. Cho D. Chokheli W.H. Chung Y.S. Chung M.A. Cioccihh A. Clark C. Clarke G. Compostellaff M.E. Convery J. Conway M.Corbo M. Cordelli C.A. Cox D.J. Cox F. Crescioligg J. Cuevasz R. Culbertson D. Dagenhart N. d'Ascenzow M. Datta P. de Barbaro M. Dell'Orsogg L. Demortier M. Deninno F. Devoto M. d'Erricoff A. Di Cantogg B. Di Ruzza J.R. Dittmann M. D'Onofrio S. Donatigg P. Dong M. Dorigo T. Dorigo K. Ebina A. Elagin A. Eppig R. Erbacher S. Errede N. Ershaidatdd R. Eusebi S. Farrington M. Feindt J.P. Fernandez R. Field G. Flanaganu R. Forrest M.J. Frank M. Franklin J.C. Freeman Y. Funakoshi I. Furic M. Gallinaro J.E. Garcia A.F. Garfinkel P. Garosihh H. Gerberich E. Gerchtein S. Giagu V. Giakoumopoulou P. Giannetti K. Gibson C.M. Ginsburg N. Giokaris P. Giromini G. Giurgiu V. Glagolev D. Glenzinski M. Gold D. Goldin N. Goldschmidt A. Golossanov G. Gomez G. Gomez-Ceballos M. Goncharov O. Gonz\'alez I. Gorelov A.T. Goshaw K. Goulianos S. Grinstein C. Grosso-Pilcher R.C. Group J. Guimaraes da Costa S.R. Hahn E. Halkiadakis A. Hamaguchi J.Y. Han F. Happacher K. Hara D. Hare M. Hare R.F. Harr K. Hatakeyama C. Hays M. Heck J. Heinrich M. Herndon S. Hewamanage A. Hocker W. Hopkinsg D. Horn S. Hou R.E. Hughes M. Hurwitz U. Husemann N. Hussain M. Hussein J. Huston G. Introzzi M. Iorijj A. Ivanovp E. James D. Jang B. Jayatilaka E.J. Jeon S. Jindariani M. Jones K.K. Joo S.Y. Jun T.R. Junk T. Kamon P.E. Karchin A. Kasmi Y. Katoo W. Ketchum J. Keung V. Khotilovich B. Kilminster D.H. Kim H.S. Kim J.E. Kim M.J. Kim S.B. Kim S.H. Kim Y.K. Kim Y.J. Kim N. Kimura M. Kirby S. Klimenko K. Knoepfel K. Kondo D.J. Kong J. Konigsberg A.V. Kotwal M. Kreps J. Kroll D. Krop M. Kruse V. Krutelyovc T. Kuhr M. Kurata S. Kwang A.T. Laasanen S. Lami S. Lammel M. Lancaster R.L. Lander K. Lannony A. Lath G. Latinohh T. LeCompte E. Lee H.S. Leeq J.S. Lee S.W. Leebb S. Leogg S. Leone J.D. Lewis A. Limosanit C.-J. Lin M. Lindgren E. Lipeles A. Lister D.O. Litvintsev C. Liu H. Liu Q. Liu T. Liu S. Lockwitz A. Loginov D. Lucchesiff J. Lueck P. Lujan P. Lukens G. Lungu J. Lys R. Lysake R. Madrak K. Maeshima P. Maestrohh S. Malik G. Mancaa A. Manousakis-Katsikakis F. Margaroli C. Marino M. Mart\'inez P. Mastrandrea K. Matera M.E. Mattson A. Mazzacane P. Mazzanti K.S. McFarland P. McIntyre R. McNultyj A. Mehta P. Mehtala C. Mesropian T. Miao D. Mietlicki A. Mitra H. Miyake S. Moed N. Moggi M.N. Mondragonm C.S. Moon R. Moore M.J. Morelloii J. Morlock P. Movilla Fernandez A. Mukherjee Th. Muller P. Murat M. Mussiniee J. Nachtmann Y. Nagai J. Naganoma I. Nakano A. Napier J. Nett C. Neu M.S. Neubauer J. Nielsend L. Nodulman S.Y. Noh O. Norniella L. Oakes S.H. Oh Y.D. Oh I. Oksuzian T. Okusawa R. Orava L. Ortolan S. Pagan Grisoff C. Pagliarone E. Palenciaf V. Papadimitriou A.A. Paramonov J. Patrick G. Paulettakk M. Paulini C. Paus D.E. Pellett A. Penzo T.J. Phillips G. Piacentino E. Pianori J. Pilot K. Pitts C. Plager L. Pondrom S. Poprockig K. Potamianos F. Prokoshincc A. Pranko F. Ptohosh G. Punzigg A. Rahaman V. Ramakrishnan N. Ranjan I. Redondo P. Renton M. Rescigno T. Riddick F. Rimondiee L. Ristori A. Robson T. Rodrigo T. Rodriguez E. Rogers S. Rollii R. Roser F. Ruffinihh A. Ruiz J. Russ V. Rusu A. Safonov W.K. Sakumoto Y. Sakurai L. Santikk K. Sato V. Savelievw A. Savoy-Navarroaa P. Schlabach A. Schmidt E.E. Schmidt T. Schwarz L. Scodellaro A. Scribanohh F. Scuri S. Seidel Y. Seiya A. Semenov F. Sforzahh S.Z. Shalhout T. Shears P.F. Shepard M. Shimojimav M. Shochet I. Shreyber-Tecker A. Simonenko P. Sinervo K. Sliwa J.R. Smith F.D. Snider A. Soha V. Sorin H. Song P. Squillaciotihh M. Stancari R. St. Denis B. Stelzer O. Stelzer-Chilton D. Stentzx J. Strologas G.L. Strycker Y. Sudo A. Sukhanov I. Suslov K. Takemasa Y. Takeuchi J. Tang M. Tecchio P.K. Teng J. Thomg J. Thome G.A. Thompson E. Thomson D. Toback S. Tokar K. Tollefson T. Tomura D. Tonelli S. Torre D. Torretta P. Totaro M. Trovatoii F. Ukegawa S. Uozumi A. Varganov F. V\'azquezm G. Velev C. Vellidis M. Vidal I. Vila R. Vilar J. Viz\'an M. Vogel G. Volpi P. Wagner R.L. Wagner T. Wakisaka R. Wallny S.M. Wang A. Warburton D. Waters W.C. Wester III D. Whitesonb A.B. Wicklund E. Wicklund S. Wilbur F. Wick H.H. Williams J.S. Wilson P. Wilson B.L. Winer P. Wittichg S. Wolbers H. Wolfe T. Wright X. Wu Z. Wu K. Yamamoto D. Yamato T. Yang U.K. Yangr Y.C. Yang W.-M. Yao G.P. Yeh K. Yin J. Yoh K. Yorita T. Yoshidal G.B. Yu I. Yu S.S. Yu J.C. Yun A. Zanetti Y. Zeng C. Zhou S. Zucchelliee
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classification hep-ex
keywords upsilonangulardistributionscollisionsdecaysfirstmesonsmuons
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The angular distributions of muons from Upsilon(1S,2S,3S) to mu+mu- decays are measured using data from proton anti-proton collisions at sqrt(s)=1.96 TeV corresponding to an integrated luminosity of 6.7 /fb and collected with the CDF II detector at the Fermilab Tevatron. This analysis is the first to report the full angular distributions as functions of transverse momentum pT for the Upsilon mesons in both the Collins-Soper and s-channel helicity frames. This is also the first measurement of spin alignment of Upsilon(3S) mesons. Within the kinematic range of Upsilon rapidity |y|<0.6 and pT up to 40 GeV/c, the angular distributions are found to be nearly isotropic.

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