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Search for standard model Higgs boson production in association with a $W$ boson at CDF

T. Aaltonen⁹, B. Álvarez González^21,x, S. Amerio^41a, D. Amidei³², A. Anastassov³⁶, A. Annovi¹⁷, J. Antos¹², G. Apollinari¹⁵, J. A. Appel¹⁵ et al.

A. Apresyan⁴⁶, T. Arisawa⁵⁵, A. Artikov¹³, J. Asaadi⁵¹, W. Ashmanskas¹⁵, B. Auerbach⁵⁸, A. Aurisano⁵¹, F. Azfar⁴⁰, W. Badgett¹⁵, A. Barbaro-Galtieri²⁶, V. E. Barnes⁴⁶, B. A. Barnett²³, P. Barria^44a,44c, P. Bartos¹², M. Bauce^41a,41b, G. Bauer³⁰, F. Bedeschi^44a, D. Beecher²⁸, S. Behari²³, G. Bellettini^44a,44b, J. Bellinger⁵⁷, D. Benjamin¹⁴, A. Beretvas¹⁵, A. Bhatti⁴⁸, M. Binkley^15,a, D. Bisello^41a,41b, I. Bizjak^28,bb, K. R. Bland⁵, B. Blumenfeld²³, A. Bocci¹⁴, A. Bodek⁴⁷, D. Bortoletto⁴⁶, J. Boudreau⁴⁵, A. Boveia¹¹, L. Brigliadori^6a,6b, C. Bromberg³³, E. Brucken²¹, M. Bucciantonio^44a,44b, J. Budagov¹³, H. S. Budd⁴⁷, S. Budd²², K. Burkett¹⁵, G. Busetto^41a,41b, P. Bussey¹⁹, A. Buzatu³¹, A. Calamba¹⁰, C. Calancha²⁹, S. Camarda⁴, M. Campanelli²⁸, M. Campbell³², F. Canelli^11,15,m, B. Carls²², D. Carlsmith⁵⁷, R. Carosi^44a, S. Carrillo^16,l, S. Carron¹⁵, B. Casal⁹, M. Casarsa^59a, A. Castro^6a,6b, P. Catastini²⁰, D. Cauz^59a, V. Cavaliere²², M. Cavalli-Sforza⁴, A. Cerri^26,f, L. Cerrito^28,r, Y. C. Chen¹, M. Chertok⁷, G. Chiarelli^44a, G. Chlachidze¹⁵, F. Chlebana¹⁵, K. Cho²⁵, D. Chokheli¹³, J. P. Chou²⁰, W. H. Chung⁵⁷, Y. S. Chung⁴⁷, C. I. Ciobanu⁴², M. A. Ciocci^44a,44c, A. Clark¹⁸, G. Compostella^41a,41b, M. E. Convery¹⁵, J. Conway⁷, M. Corbo⁴², M. Cordelli¹⁷, C. A. Cox⁷, D. J. Cox⁷, F. Crescioli^44a,44b, C. Cuenca Almenar⁵⁸, J. Cuevas^9,x, R. Culbertson¹⁵, D. Dagenhart¹⁵, N. d’Ascenzo^42,v, M. Datta¹⁵, P. de Barbaro⁴⁷, S. De Cecco^49a, M. Dell’Orso^44a,44b, L. Demortier⁴⁸, M. Deninno^6a, F. Devoto²¹, M. d’Errico^41a,41b, A. Di Canto^44a,44b, B. Di Ruzza^44a, J. R. Dittmann⁵, M. D’Onofrio²⁷, S. Donati^44a,44b, P. Dong¹⁵, M. Dorigo^59a, T. Dorigo^41a, K. Ebina⁵⁶, A. Elagin⁵¹, A. Eppig³², R. Erbacher⁷, D. Errede²², S. Errede²², N. Ershaidat^42,aa, R. Eusebi⁵¹, H. C. Fang²⁶, S. Farrington⁴⁰, M. Feindt²⁴, J. P. Fernandez²⁹, C. Ferrazza^44a,44d, R. Field¹⁶, G. Flanagan^46,t, R. Forrest⁷, M. J. Frank⁵, M. Franklin²⁰, J. C. Freeman¹⁵, Y. Funakoshi⁵⁵, I. Furic¹⁶, M. Gallinaro⁴⁸, J. E. Garcia¹⁸, A. F. Garfinkel⁴⁶, P. Garosi^44a,44c, H. Gerberich²², E. Gerchtein¹⁵, S. Giagu^49a,49b, V. Giakoumopoulou³, P. Giannetti^44a, K. Gibson⁴⁵, C. M. Ginsburg¹⁵, N. Giokaris³, P. Giromini¹⁷, M. Giunta^44a, G. Giurgiu²³, V. Glagolev¹³, D. Glenzinski¹⁵, M. Gold³⁵, D. Goldin⁵¹, N. Goldschmidt¹⁶, A. Golossanov¹⁵, G. Gomez⁹, G. Gomez-Ceballos³⁰, M. Goncharov³⁰, O. González²⁹, I. Gorelov³⁵, A. T. Goshaw¹⁴, K. Goulianos⁴⁸, S. Grinstein⁴, C. Grosso-Pilcher¹¹, R. C. Group^54,15, J. Guimaraes da Costa²⁰, Z. Gunay-Unalan³³, C. Haber²⁶, S. R. Hahn¹⁵, E. Halkiadakis⁵⁰, A. Hamaguchi³⁹, J. Y. Han⁴⁷, F. Happacher¹⁷, K. Hara⁵², D. Hare⁵⁰, M. Hare⁵³, R. F. Harr⁵⁶, K. Hatakeyama⁵, C. Hays⁴⁰, M. Heck²⁴, J. Heinrich⁴³, M. Herndon⁵⁷, S. Hewamanage⁵, A. Hocker¹⁵, W. Hopkins^15,g, D. Horn²⁴, S. Hou¹, R. E. Hughes³⁷, M. Hurwitz¹¹, U. Husemann⁵⁸, N. Hussain³¹, M. Hussein³³, J. Huston³³, G. Introzzi^44a, M. Iori^49a,49b, A. Ivanov^7,p, E. James¹⁵, D. Jang¹⁰, B. Jayatilaka¹⁴, E. J. Jeon²⁵, S. Jindariani¹⁵, W. Johnson⁷, M. Jones⁴⁶, K. K. Joo²⁵, S. Y. Jun¹⁰, T. R. Junk¹⁵, T. Kamon⁵¹, P. E. Karchin⁵⁶, A. Kasmi⁵, Y. Kato^39,o, W. Ketchum¹¹, J. Keung⁴³, V. Khotilovich⁵¹, B. Kilminster¹⁵, D. H. Kim²⁵, H. S. Kim²⁵, H. W. Kim²⁵, J. E. Kim²⁵, M. J. Kim¹⁷, S. B. Kim²⁵, S. H. Kim⁵², Y. K. Kim¹¹, N. Kimura⁵⁵, M. Kirby¹⁵, K. Knoepfel¹⁵, K. Kondo^55,a, D. J. Kong²⁵, J. Konigsberg¹⁶, A. V. Kotwal¹⁴, M. Kreps²⁴, J. Kroll⁴³, D. Krop¹¹, M. Kruse¹⁴, V. Krutelyov^51,d, T. Kuhr²⁴, M. Kurata⁵², S. Kwang¹¹, A. T. Laasanen⁴⁶, S. Lami^44a, S. Lammel¹⁵, M. Lancaster²⁸, R. L. Lander⁷, K. Lannon^37,w, A. Lath⁵⁰, G. Latino^44a,44b, T. LeCompte², E. Lee⁵¹, H. S. Lee¹¹, J. S. Lee²⁵, S. W. Lee^51,y, S. Leo^44a,44b, S. Leone^44a, J. D. Lewis¹⁵, A. Limosani^14,s, C.-J. Lin²⁶, J. Linacre⁴⁰, M. Lindgren¹⁵, E. Lipeles⁴³, A. Lister¹⁸, D. O. Litvintsev¹⁵, C. Liu⁴⁵, H. Liu⁵⁴, Q. Liu⁴⁶, T. Liu¹⁵, S. Lockwitz⁵⁸, A. Loginov⁵⁸, D. Lucchesi^41a,41b, J. Lueck²⁴, P. Lujan²⁶, P. Lukens¹⁵, G. Lungu⁴⁸, J. Lys²⁶, R. Lysak¹², R. Madrak¹⁵, K. Maeshima¹⁵, K. Makhoul³⁰, S. Malik⁴⁸, G. Manca^27,b, A. Manousakis-Katsikakis³, F. Margaroli⁴⁶, C. Marino²⁴, M. Martínez⁴, R. Martínez-Ballarín²⁹, P. Mastrandrea^49a, M. E. Mattson⁵⁶, A. Mazzacane¹⁵, P. Mazzanti^6a, K. S. McFarland⁴⁷, P. McIntyre⁵¹, R. McNulty^27,j, A. Mehta²⁷, P. Mehtala²¹, A. Menzione^44a, C. Mesropian⁴⁸, T. Miao¹⁵, D. Mietlicki³², A. Mitra¹, H. Miyake⁵², S. Moed¹⁵, N. Moggi^6a, M. N. Mondragon^15,l, C. S. Moon²⁵, R. Moore¹⁵, M. J. Morello^44a, J. Morlock²⁴, P. Movilla Fernandez¹⁵, A. Mukherjee¹⁵, Th. Muller²⁴, P. Murat¹⁵, M. Mussini^6a,6b, J. Nachtman^15,n, Y. Nagai⁵², J. Naganoma⁵⁵, I. Nakano³⁸, A. Napier⁵³, J. Nett⁵¹, C. Neu⁵⁴, M. S. Neubauer²², J. Nielsen^26,e, L. Nodulman², O. Norniella²², E. Nurse²⁸, L. Oakes⁴⁰, S. H. Oh¹⁴, Y. D. Oh²⁵, I. Oksuzian⁵⁴, T. Okusawa³⁹, R. Orava²¹, L. Ortolan⁴, S. Pagan Griso^41a,41b, C. Pagliarone^59a, E. Palencia^9,f, V. Papadimitriou¹⁵, A. A. Paramonov², J. Patrick¹⁵, G. Pauletta^59a,59b, M. Paulini¹⁰, C. Paus³⁰, D. E. Pellett⁷, A. Penzo^59a, T. J. Phillips¹⁴, G. Piacentino^44a, E. Pianori⁴³, J. Pilot³⁷, K. Pitts²², C. Plager⁸, L. Pondrom⁵⁷, S. Poprocki^15,g, K. Potamianos⁴⁶, O. Poukhov^13,a, F. Prokoshin^13,z, A. Pranko¹⁵, F. Ptohos^17,h, G. Punzi^44a,44b, A. Rahaman⁴⁵, V. Ramakrishnan⁵⁷, N. Ranjan⁴⁶, I. Redondo²⁹, P. Renton⁴⁰, M. Rescigno^49a, T. Riddick²⁸, F. Rimondi^6a,6b, L. Ristori^44a,15, A. Robson¹⁹, T. Rodrigo⁹, T. Rodriguez⁴³, E. Rogers²², S. Rolli^53,i, R. Roser¹⁵, M. Rossi^59a, F. Rubbo¹⁵, F. Ruffini^44a,44c, A. Ruiz⁹, J. Russ¹⁰, V. Rusu¹⁵, A. Safonov⁵¹, W. K. Sakumoto⁴⁷, Y. Sakurai⁵⁵, L. Santi^59a,59b, L. Sartori^44a, K. Sato⁵², V. Saveliev^42,v, A. Savoy-Navarro⁴², P. Schlabach¹⁵, A. Schmidt²⁴, E. E. Schmidt¹⁵, M. P. Schmidt^58,a, M. Schmitt³⁶, T. Schwarz⁷, L. Scodellaro⁹, A. Scribano^44a,44c, F. Scuri^44a, A. Sedov⁴⁶, S. Seidel³⁵, Y. Seiya³⁹, A. Semenov¹³, F. Sforza^44a,44b, A. Sfyrla²², S. Z. Shalhout⁷, T. Shears²⁷, P. F. Shepard⁴⁵, M. Shimojima^52,u, M. Shochet¹¹, I. Shreyber³⁴, A. Simonenko¹³, P. Sinervo³¹, A. Sissakian^13,a, J. Slaunwhite^37,w, K. Sliwa⁵³, J. R. Smith⁷, F. D. Snider¹⁵, A. Soha¹⁵, V. Sorin⁴, P. Squillacioti^44a, M. Stancari¹⁵, M. Stanitzki⁵⁸, R. St. Denis¹⁹, B. Stelzer³¹, O. Stelzer-Chilton³¹, D. Stentz³⁶, J. Strologas³⁵, G. L. Strycker³², Y. Sudo⁵², A. Sukhanov¹⁵, I. Suslov¹³, A. Taffard^22,c, K. Takemasa⁵², Y. Takeuchi⁵², J. Tang¹¹, M. Tecchio³², P. K. Teng¹, J. Thom^15,g, J. Thome¹⁰, G. A. Thompson²², E. Thomson⁴³, P. Ttito-Guzmán²⁹, D. Toback⁵¹, S. Tokar¹², K. Tollefson³³, T. Tomura⁵², D. Tonelli¹⁵, S. Torre¹⁷, D. Torretta¹⁵, P. Totaro^41a, M. Trovato^44a,44d, Y. Tu⁴³, F. Ukegawa⁵², S. Uozumi²⁵, A. Varganov³², F. Vázquez^16,l, G. Velev¹⁵, C. Vellidis¹⁵, M. Vidal²⁹, I. Vila⁹, R. Vilar⁹, J. Vizán⁹, M. Vogel³⁵, G. Volpi¹⁷, P. Wagner⁴³, R. L. Wagner¹⁵, T. Wakisaka³⁹, R. Wallny⁸, S. M. Wang¹, A. Warburton³¹, D. Waters²⁸, W. C. Wester, III¹⁵, D. Whiteson^43,c, A. B. Wicklund², E. Wicklund¹⁵, S. Wilbur¹¹, F. Wick²⁴, H. H. Williams⁴³, J. S. Wilson³⁷, P. Wilson¹⁵, B. L. Winer³⁷, P. Wittich^15,g, S. Wolbers¹⁵, H. Wolfe³⁷, T. Wright³², X. Wu¹⁸, Z. Wu⁵, K. Yamamoto³⁹, T. Yang¹⁵, U. K. Yang^11,q, Y. C. Yang²⁵, W.-M. Yao²⁶, G. P. Yeh¹⁵, K. Yi^15,n, J. Yoh¹⁵, K. Yorita⁵⁵, T. Yoshida^39,k, G. B. Yu¹⁴, I. Yu²⁵, S. S. Yu¹⁵, J. C. Yun¹⁵, A. Zanetti^59a, Y. Zeng¹⁴, and S. Zucchelli^6a,6b

¹Institute of Physics, Academia Sinica, Taipei, Taiwan 11529, Republic of China
²Argonne National Laboratory, Argonne, Illinois 60439, USA
³University of Athens, 157 71 Athens, Greece
⁴Institut de Fisica d’Altes Energies, ICREA, Universitat Autonoma de Barcelona, E-08193, Bellaterra (Barcelona), Spain
⁵Baylor University, Waco, Texas 76798, USA
^6aIstituto Nazionale di Fisica Nucleare Bologna, I-40127 Bologna, Italy
^6bUniversity of Bologna, I-40127 Bologna, Italy
⁷University of California, Davis, Davis, California 95616, USA
⁸University of California, Los Angeles, Los Angeles, California 90024, USA
⁹Instituto de Fisica de Cantabria, CSIC-University of Cantabria, 39005 Santander, Spain
¹⁰Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
¹¹Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
¹²Comenius University, 842 48 Bratislava, Slovakia; Institute of Experimental Physics, 040 01 Kosice, Slovakia
¹³Joint Institute for Nuclear Research, RU-141980 Dubna, Russia
¹⁴Duke University, Durham, North Carolina 27708, USA
¹⁵Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
¹⁶University of Florida, Gainesville, Florida 32611, USA
¹⁷Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, I-00044 Frascati, Italy
¹⁸University of Geneva, CH-1211 Geneva 4, Switzerland
¹⁹Glasgow University, Glasgow G12 8QQ, United Kingdom
²⁰Harvard University, Cambridge, Massachusetts 02138, USA
²¹Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki, Finland, USA
²²University of Illinois, Urbana, Illinois 61801, USA
²³The Johns Hopkins University, Baltimore, Maryland 21218, USA
²⁴Institut für Experimentelle Kernphysik, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany
²⁵Center for High Energy Physics: Kyungpook National University, Daegu 702-701, Korea; Seoul National University, Seoul 151-742, Korea; Sungkyunkwan University, Suwon 440-746, Korea; Korea Institute of Science and Technology Information, Daejeon 305-806, Korea; Chonnam National University, Gwangju 500-757, Korea; Chonbuk National University, Jeonju 561-756, Korea
²⁶Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
²⁷University of Liverpool, Liverpool L69 7ZE, United Kingdom
²⁸University College London, London WC1E 6BT, United Kingdom
²⁹Centro de Investigaciones Energeticas Medioambientales y Tecnologicas, E-28040 Madrid, Spain
³⁰Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
³¹Institute of Particle Physics: McGill University, Montréal, Québec, Canada H3A 2T8; Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6; University of Toronto, Toronto, Ontario, Canada M5S 1A7; and TRIUMF, Vancouver, British Columbia, Canada V6T 2A3
³²University of Michigan, Ann Arbor, Michigan 48109, USA
³³Michigan State University, East Lansing, Michigan 48824, USA
³⁴Institution for Theoretical and Experimental Physics, ITEP, Moscow 117259, Russia
³⁵University of New Mexico, Albuquerque, New Mexico 87131, USA
³⁶Northwestern University, Evanston, Illinois 60208, USA
³⁷The Ohio State University, Columbus, Ohio 43210, USA
³⁸Okayama University, Okayama 700-8530, Japan
³⁹Osaka City University, Osaka 588, Japan
⁴⁰University of Oxford, Oxford OX1 3RH, United Kingdom
^41aIstituto Nazionale di Fisica Nucleare, Sezione di Padova-Trento, I-35131 Padova, Italy
^41bUniversity of Padova, I-35131 Padova, Italy
⁴²LPNHE, Universite Pierre et Marie Curie/IN2P3-CNRS, UMR7585, Paris, F-75252 France
⁴³University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
^44aIstituto Nazionale di Fisica Nucleare Pisa, I-56127 Pisa, Italy
^44bUniversity of Pisa, I-56127 Pisa, Italy
^44cUniversity of Siena, I-56127 Pisa, Italy
^44dScuola Normale Superiore, I-56127 Pisa, Italy
⁴⁵University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
⁴⁶Purdue University, West Lafayette, Indiana 47907, USA
⁴⁷University of Rochester, Rochester, New York 14627, USA
⁴⁸The Rockefeller University, New York, New York 10065, USA
^49aIstituto Nazionale di Fisica Nucleare, Sezione di Roma 1, I-00185 Roma, Italy
^49bSapienza Università di Roma, I-00185 Roma, Italy
⁵⁰Rutgers University, Piscataway, New Jersey 08855, USA
⁵¹Texas A&M University, College Station, Texas 77843, USA
⁵²University of Tsukuba, Tsukuba, Ibaraki 305, Japan
⁵³Tufts University, Medford, Massachusetts 02155, USA
⁵⁴University of Virginia, Charlottesville, Virginia 22906, USA
⁵⁵Waseda University, Tokyo 169, Japan
⁵⁶Wayne State University, Detroit, Michigan 48201, USA
⁵⁷University of Wisconsin, Madison, Wisconsin 53706, USA
⁵⁸Yale University, New Haven, Connecticut 06520, USA
^59aIstituto Nazionale di Fisica Nucleare Trieste/Udine, I-34100 Trieste, I-33100 Udine, Italy
^59bUniversity of Udine, I-33100 Udine, Italy

^aDeceased
^bWith visitor from Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari, 09042 Monserrato (Cagliari), Italy
^cWith visitor from University of CA Irvine, Irvine, CA 92697, USA
^dWith visitor from University of CA Santa Barbara, Santa Barbara, CA 93106, USA
^eWith visitor from University of CA Santa Cruz, Santa Cruz, CA 95064, USA
^fWith visitor from CERN, CH-1211 Geneva, Switzerland
^gWith visitor from Cornell University, Ithaca, NY 14853, USA
^hWith visitor from University of Cyprus, Nicosia CY-1678, Cyprus
ⁱWith visitor from Office of Science, U. S. Department of Energy, Washington, DC 20585, USA
^jWith visitor from University College Dublin, Dublin 4, Ireland
^kWith visitor from University of Fukui, Fukui City, Fukui Prefecture, Japan 910-0017
^lWith visitor from Universidad Iberoamericana, Mexico D. F., Mexico
^mWith visitor from Iowa State University, Ames, IA 50011, USA
ⁿWith visitor from University of Iowa, Iowa City, IA 52242, USA
^oWith visitor from Kinki University, Higashi-Osaka City, Japan 577-8502
^pWith visitor from Kansas State University, Manhattan, KS 66506, USA
^qWith visitor from University of Manchester, Manchester M13 9PL, United Kingdom
^rWith visitor from Queen Mary, University of London, London, E1 4NS, United Kingdom
^sWith visitor from University of Melbourne, Victoria 3010, Australia
^tWith visitor from Muons, Inc., Batavia, IL 60510, USA
^uWith visitor from Nagasaki Institute of Applied Science, Nagasaki, Japan
^vWith visitor from National Research Nuclear University, Moscow, Russia
^wWith visitor from University of Notre Dame, Notre Dame, IN 46556, USA
^xWith visitor from Universidad de Oviedo, E-33007 Oviedo, Spain
^yWith visitor from Texas Tech University, Lubbock, TX 79609, USA
^zWith visitor from Universidad Tecnica Federico Santa Maria, 110v Valparaiso, Chile
^aaWith visitor from Yarmouk University, Irbid 211-63, Jordan
^bbWith visitor from On leave from J. Stefan Institute, Ljubljana, Slovenia

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Phys. Rev. D 85, 052002 – Published 5 March, 2012

DOI: https://doi.org/10.1103/PhysRevD.85.052002

Abstract

We present a search for the standard model Higgs boson production in association with a $W$ boson in proton-antiproton collisions ( $p \bar{p} \to W^{\pm} H \to ℓ ν b \bar{b}$ ) at a center of mass energy of 1.96 TeV. The search employs data collected with the CDF II detector which correspond to an integrated luminosity of approximately $2.7 {fb}^{- 1}$ . We recorded this data with two kinds of triggers. The first kind required high- $p_{T}$ charged leptons and the second required both missing transverse energy and jets. The search selects events consistent with a signature of a single lepton ( $e^{\pm} / μ^{\pm}$ ), missing transverse energy, and two jets. Jets corresponding to bottom quarks are identified with a secondary vertex tagging method and a jet probability tagging method. Kinematic information is fed in an artificial neural network to improve discrimination between signal and background. The search finds that both the observed number of events and the neural network output distributions are consistent with the standard model background expectations, and sets 95% confidence level upper limits on the production cross section times branching ratio. The limits are expressed as a ratio to the standard model production rate. The limits range from 3.6 (4.3 expected) to 61.1 (43.2 expected) for Higgs masses from 100 to $150 GeV / c^{2}$ , respectively.