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Measurement of the inclusive jet cross section in pp collisions at √s=7TeV

Physical Review Letters 107:13 (2011)

Authors:

S Chatrchyan, V Khachatryan, AM Sirunyan, A Tumasyan, W Adam, T Bergauer, M Dragicevic, J Erö, C Fabjan, M Friedl, R Frühwirth, VM Ghete, J Hammer, S Hänsel, M Hoch, N Hörmann, J Hrubec, M Jeitler, W Kiesenhofer, M Krammer, D Liko, I Mikulec, M Pernicka, H Rohringer, R Schöfbeck, J Strauss, A Taurok, F Teischinger, P Wagner, W Waltenberger, G Walzel, E Widl, CE Wulz, V Mossolov, N Shumeiko, J Suarez Gonzalez, S Bansal, L Benucci, EA De Wolf, X Janssen, J Maes, T Maes, L Mucibello, S Ochesanu, B Roland, R Rougny, M Selvaggi, H Van Haevermaet, P Van Mechelen, N Van Remortel, F Blekman, S Blyweert, J D'hondt, O Devroede, R Gonzalez Suarez, A Kalogeropoulos, M Maes, W Van Doninck, P Van Mulders, GP Van Onsem, I Villella, O Charaf, B Clerbaux, G De Lentdecker, V Dero, APR Gay, GH Hammad, T Hreus, PE Marage, L Thomas, C Vander Velde, P Vanlaer, V Adler, A Cimmino, S Costantini, M Grunewald, B Klein, J Lellouch, A Marinov, J Mccartin, D Ryckbosch, F Thyssen, M Tytgat, L Vanelderen, P Verwilligen, S Walsh, N Zaganidis, S Basegmez, G Bruno, J Caudron, L Ceard, E Cortina Gil, J De Favereau De Jeneret, C Delaere, D Favart, A Giammanco, G Grégoire, J Hollar, V Lemaitre, J Liao

Abstract:

The inclusive jet cross section is measured in pp collisions with a center-of-mass energy of 7 TeV at the Large Hadron Collider using the CMS experiment. The data sample corresponds to an integrated luminosity of 34pb -1. The measurement is made for jet transverse momenta in the range 18-1100 GeV and for absolute values of rapidity less than 3. The measured cross section extends to the highest values of jet pT ever observed and, within the experimental and theoretical uncertainties, is generally in agreement with next-to-leading-order perturbative QCD predictions. © 2011 CERN, for the CMS Collaboration. Published by the American Physical Society under the terms of the uri xlink:href=http://creativecommons.org/licenses/by/3.0/ Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
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Implementation and testing of the first prompt search for gravitational wave transients with electromagnetic counterparts

(2011)

Authors:

The LIGO Scientific Collaboration, Virgo Collaboration, J Abadie, BP Abbott, R Abbott, TD Abbott, M Abernathy, T Accadia, F Acernese, C Adams, R Adhikari, C Affeldt, P Ajith, B Allen, GS Allen, E Amador Ceron, D Amariutei, RS Amin, SB Anderson, WG Anderson, K Arai, MA Arain, MC Araya, SM Aston, P Astone, D Atkinson, P Aufmuth, C Aulbert, BE Aylott, S Babak, P Baker, G Ballardin, S Ballmer, D Barker, F Barone, B Barr, P Barriga, L Barsotti, M Barsuglia, MA Barton, I Bartos, R Bassiri, M Bastarrika, A Basti, J Batch, J Bauchrowitz, Th S Bauer, M Bebronne, B Behnke, MG Beker, AS Bell, A Belletoile, I Belopolski, M Benacquista, JM Berliner, A Bertolini, J Betzwieser, N Beveridge, PT Beyersdorf, IA Bilenko, G Billingsley, J Birch, R Biswas, M Bitossi, MA Bizouard, E Black, JK Blackburn, L Blackburn, D Blair, B Bland, M Blom, O Bock, TP Bodiya, C Bogan, R Bondarescu, F Bondu, L Bonelli, R Bonnand, R Bork, M Born, V Boschi, S Bose, L Bosi, B Bouhou, S Braccini, C Bradaschia, PR Brady, VB Braginsky, M Branchesi, JE Brau, J Breyer, T Briant, DO Bridges, A Brillet, M Brinkmann, V Brisson, M Britzger, AF Brooks, DA Brown, A Brummit, T Bulik, HJ Bulten, A Buonanno, J Burguet--Castell, O Burmeister, D Buskulic, C Buy, RL Byer, L Cadonati, G Cagnoli, J Cain, E Calloni, JB Camp, P Campsie, J Cannizzo, K Cannon, B Canuel, J Cao, CD Capano, F Carbognani, S Caride, S Caudill, M Cavaglià, F Cavalier, R Cavalieri, G Cella, C Cepeda, E Cesarini, O Chaibi, T Chalermsongsak, E Chalkley, P Charlton, E Chassande-Mottin, S Chelkowski, Y Chen, A Chincarini, A Chiummo, H Cho, N Christensen, SSY Chua, CTY Chung, S Chung, G Ciani, F Clara, DE Clark, J Clark, JH Clayton, F Cleva, E Coccia, P-F Cohadon, CN Colacino, J Colas, A Colla, M Colombini, A Conte, R Conte, D Cook, TR Corbitt, M Cordier, N Cornish, A Corsi, CA Costa, M Coughlin, J-P Coulon, P Couvares, DM Coward, DC Coyne, JDE Creighton, TD Creighton, AM Cruise, A Cumming, L Cunningham, E Cuoco, RM Cutler, K Dahl, SL Danilishin, R Dannenberg, S D'Antonio, K Danzmann, V Dattilo, B Daudert, H Daveloza, M Davier, G Davies, EJ Daw, R Day, T Dayanga, R De Rosa, D DeBra, G Debreczeni, J Degallaix, W Del Pozzo, M del Prete, T Dent, V Dergachev, R DeRosa, R DeSalvo, V Dhillon, S Dhurandhar, L Di Fiore, A Di Lieto, I Di Palma, M Di Paolo Emilio, A Di Virgilio, M Díaz, A Dietz, F Donovan, KL Dooley, S Dorsher, M Drago, RWP Drever, JC Driggers, Z Du, J-C Dumas, S Dwyer, T Eberle, M Edgar, M Edwards, A Effler, P Ehrens, G Endrőczi, R Engel, T Etzel, K Evans, M Evans, T Evans, M Factourovich, V Fafone, S Fairhurst, Y Fan, BF Farr, W Farr, D Fazi, H Fehrmann, D Feldbaum, I Ferrante, F Fidecaro, LS Finn, I Fiori, RP Fisher, R Flaminio, M Flanigan, S Foley, E Forsi, LA Forte, N Fotopoulos, J-D Fournier, J Franc, S Frasca, F Frasconi, M Frede, M Frei, Z Frei, A Freise, R Frey, TT Fricke, JK Fridriksson, D Friedrich, P Fritschel, VV Frolov, PJ Fulda, M Fyffe, M Galimberti, L Gammaitoni, MR Ganija, J Garcia, JA Garofoli, F Garufi, ME Gáspár, G Gemme, R Geng, E Genin, A Gennai, LÁ Gergely, S Ghosh, JA Giaime, S Giampanis, KD Giardina, A Giazotto, C Gill, E Goetz, LM Goggin, G González, ML Gorodetsky, S Goßler, R Gouaty, C Graef, M Granata, A Grant, S Gras, C Gray, N Gray, RJS Greenhalgh, AM Gretarsson, C Greverie, R Grosso, H Grote, S Grunewald, GM Guidi, C Guido, R Gupta, EK Gustafson, R Gustafson, T Ha, B Hage, JM Hallam, D Hammer, G Hammond, J Hanks, C Hanna, J Hanson, J Harms, GM Harry, IW Harry, ED Harstad, MT Hartman, K Haughian, K Hayama, J-F Hayau, T Hayler, J Heefner, A Heidmann, MC Heintze, H Heitmann, P Hello, MA Hendry, IS Heng, AW Heptonstall, V Herrera, M Hewitson, S Hild, D Hoak, KA Hodge, K Holt, J Homan, T Hong, S Hooper, DJ Hosken, J Hough, EJ Howell, B Hughey, S Husa, SH Huttner, T Huynh-Dinh, DR Ingram, R Inta, T Isogai, A Ivanov, K Izumi, M Jacobson, H Jang, P Jaranowski, WW Johnson, DI Jones, G Jones, R Jones, L Ju, P Kalmus, V Kalogera, I Kamaretsos, S Kandhasamy, G Kang, JB Kanner, E Katsavounidis, W Katzman, H Kaufer, K Kawabe, S Kawamura, F Kawazoe, W Kells, DG Keppel, Z Keresztes, A Khalaidovski, FY Khalili, EA Khazanov, B Kim, C Kim, D Kim, H Kim, K Kim, N Kim, Y-M Kim, PJ King, M Kinsey, DL Kinzel, JS Kissel, S Klimenko, K Kokeyama, V Kondrashov, R Kopparapu, S Koranda, WZ Korth, I Kowalska, D Kozak, V Kringel, S Krishnamurthy, B Krishnan, A Królak, G Kuehn, R Kumar, P Kwee, M Laas-Bourez, PK Lam, M Landry, M Lang, B Lantz, N Lastzka, C Lawrie, A Lazzarini, P Leaci, CH Lee, HM Lee, N Leindecker, JR Leong, I Leonor, N Leroy, N Letendre, J Li, TGF Li, N Liguori, PE Lindquist, NA Lockerbie, D Lodhia, M Lorenzini, V Loriette, M Lormand, G Losurdo, J Luan, M Lubinski, H Lück, AP Lundgren, E Macdonald, B Machenschalk, M MacInnis, DM Macleod, M Mageswaran, K Mailand, E Majorana, I Maksimovic, N Man, I Mandel, V Mandic, M Mantovani, A Marandi, F Marchesoni, F Marion, S Márka, Z Márka, A Markosyan, E Maros, J Marque, F Martelli, IW Martin, RM Martin, JN Marx, K Mason, A Masserot, F Matichard, L Matone, RA Matzner, N Mavalvala, G Mazzolo, R McCarthy, DE McClelland, P McDaniel, SC McGuire, G McIntyre, DJA McKechan, GD Meadors, M Mehmet, T Meier, A Melatos, AC Melissinos, G Mendell, D Menendez, RA Mercer, L Merill, S Meshkov, C Messenger, MS Meyer, H Miao, C Michel, L Milano, J Miller, Y Minenkov, VP Mitrofanov, G Mitselmakher, R Mittleman, O Miyakawa, B Moe, P Moesta, M Mohan, SD Mohanty, SRP Mohapatra, D Moraru, G Moreno, N Morgado, A Morgia, T Mori, S Mosca, K Mossavi, B Mours, CM Mow--Lowry, CL Mueller, G Mueller, S Mukherjee, A Mullavey, H Müller-Ebhardt, J Munch, PG Murray, A Mytidis, T Nash, L Naticchioni, R Nawrodt, V Necula, J Nelson, G Newton, E Nishida, A Nishizawa, F Nocera, D Nolting, L Nuttall, E Ochsner, J O'Dell, E Oelker, GH Ogin, JJ Oh, SH Oh, RG Oldenburg, B O'Reilly, R O'Shaughnessy, C Osthelder, CD Ott, DJ Ottaway, RS Ottens, H Overmier, BJ Owen, A Page, G Pagliaroli, L Palladino, C Palomba, Y Pan, C Pankow, F Paoletti, MA Papa, M Parisi, A Pasqualetti, R Passaquieti, D Passuello, P Patel, D Pathak, M Pedraza, P Peiris, L Pekowsky, S Penn, C Peralta, A Perreca, G Persichetti, M Phelps, M Pickenpack, F Piergiovanni, M Pietka, L Pinard, IM Pinto, M Pitkin, HJ Pletsch, MV Plissi, R Poggiani, J Pöld, F Postiglione, M Prato, V Predoi, LR Price, M Prijatelj, M Principe, S Privitera, R Prix, GA Prodi, L Prokhorov, O Puncken, M Punturo, P Puppo, V Quetschke, FJ Raab, DS Rabeling, I Rácz, H Radkins, P Raffai, M Rakhmanov, CR Ramet, B Rankins, P Rapagnani, S Rapoport, V Raymond, V Re, K Redwine, CM Reed, T Reed, T Regimbau, S Reid, DH Reitze, F Ricci, R Riesen, K Riles, NA Robertson, F Robinet, C Robinson, EL Robinson, A Rocchi, S Roddy, C Rodriguez, M Rodruck, L Rolland, J Rollins, JD Romano, R Romano, JH Romie, D Rosińska, C Röver, S Rowan, A Rüdiger, P Ruggi, K Ryan, H Ryll, P Sainathan, M Sakosky, F Salemi, L Sammut, L Sancho de la Jordana, V Sandberg, S Sankar, V Sannibale, L Santamaría, I Santiago-Prieto, G Santostasi, B Sassolas, BS Sathyaprakash, S Sato, M Satterthwaite, PR Saulson, RL Savage, R Schilling, S Schlamminger, R Schnabel, RMS Schofield, B Schulz, BF Schutz, P Schwinberg, J Scott, SM Scott, AC Searle, F Seifert, D Sellers, AS Sengupta, D Sentenac, A Sergeev, DA Shaddock, M Shaltev, B Shapiro, P Shawhan, DH Shoemaker, A Sibley, X Siemens, D Sigg, A Singer, L Singer, AM Sintes, G Skelton, BJJ Slagmolen, J Slutsky, JR Smith, MR Smith, ND Smith, RJE Smith, K Somiya, B Sorazu, J Soto, FC Speirits, L Sperandio, M Stefszky, AJ Stein, E Steinert, J Steinlechner, S Steinlechner, S Steplewski, A Stochino, R Stone, KA Strain, S Strigin, AS Stroeer, R Sturani, AL Stuver, TZ Summerscales, M Sung, S Susmithan, PJ Sutton, B Swinkels, M Tacca, L Taffarello, D Talukder, DB Tanner, SP Tarabrin, JR Taylor, R Taylor, P Thomas, KA Thorne, KS Thorne, E Thrane, A Thüring, C Titsler, KV Tokmakov, A Toncelli, M Tonelli, O Torre, C Torres, CI Torrie, E Tournefier, F Travasso, G Traylor, M Trias, K Tseng, L Turner, D Ugolini, K Urbanek, H Vahlbruch, G Vajente, M Vallisneri, JFJ van den Brand, C Van Den Broeck, S van der Putten, AA van Veggel, S Vass, M Vasuth, R Vaulin, M Vavoulidis, A Vecchio, G Vedovato, J Veitch, PJ Veitch, C Veltkamp, D Verkindt, F Vetrano, A Viceré, AE Villar, J-Y Vinet, S Vitale, S Vitale, H Vocca, C Vorvick, SP Vyatchanin, A Wade, SJ Waldman, L Wallace, Y Wan, X Wang, Z Wang, A Wanner, RL Ward, M Was, P Wei, M Weinert, AJ We, R Weiss, L Wen, S Wen, P Wessels, M West, T Westphal, K Wette, JT Whelan, SE Whitcomb, D White, BF Whiting, C Wilkinson, PA Willems, HR Williams, L Williams, B Willke, L Winkelmann, W Winkler, CC Wipf, AG Wiseman, H Wittel, G Woan, R Wooley, J Worden, J Yablon, I Yakushin, H Yamamoto, K Yamamoto, H Yang, D Yeaton-Massey, S Yoshida, P Yu, M Yvert, A Zadroźny, M Zanolin, J-P Zendri, F Zhang, L Zhang, W Zhang, Z Zhang, C Zhao, N Zotov, ME Zucker, J Zweizig, C Akerlof, M Boer, R Fender, N Gehrels, A Klotz, EO Ofek, M Smith, M Sokolowski, BW Stappers, I Steele, J Swinbank, RAMJ Wijers, W Zheng
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Measurement of the cross section for prompt isolated diphoton production in pp̄ collisions at √s=1.96TeV

Physical Review D - Particles, Fields, Gravitation and Cosmology 84:5 (2011)

Authors:

T Aaltonen, B Álvarez González, S Amerio, D Amidei, A Anastassov, A Annovi, J Antos, G Apollinari, JA Appel, A Apresyan, T Arisawa, A Artikov, J Asaadi, W Ashmanskas, B Auerbach, A Aurisano, F Azfar, W Badgett, A Barbaro-Galtieri, VE Barnes, BA Barnett, P Barria, P Bartos, M Bauce, G Bauer, F Bedeschi, D Beecher, S Behari, G Bellettini, J Bellinger, D Benjamin, A Beretvas, A Bhatti, M Binkley, D Bisello, I Bizjak, KR Bland, B Blumenfeld, A Bocci, A Bodek, D Bortoletto, J Boudreau, A Boveia, B Brau, L Brigliadori, A Brisuda, C Bromberg, E Brucken, M Bucciantonio, J Budagov, HS Budd, S Budd, K Burkett, G Busetto, P Bussey, A Buzatu, C Calancha, S Camarda, M Campanelli, M Campbell, F Canelli, A Canepa, B Carls, D Carlsmith, R Carosi, S Carrillo, S Carron, B Casal, M Casarsa, A Castro, P Catastini, D Cauz, V Cavaliere, M Cavalli-Sforza, A Cerri, L Cerrito, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, K Cho, D Chokheli, JP Chou, WH Chung, YS Chung, CI Ciobanu, MA Ciocci, A Clark, G Compostella, ME Convery, J Conway, M Corbo, M Cordelli, CA Cox, DJ Cox, F Crescioli, C Cuenca Almenar, J Cuevas, R Culbertson

Abstract:

This article reports a measurement of the production cross section of prompt isolated photon pairs in proton-antiproton collisions at √s=1.96TeV using the CDF II detector at the Fermilab Tevatron collider. The data correspond to an integrated luminosity of 5.36fb-1. The cross section is presented as a function of kinematic variables sensitive to the reaction mechanisms. The results are compared with three perturbative QCD calculations: (1) a leading-order parton shower Monte Carlo, (2) a fixed next-to-leading-order calculation and (3) a next-to-leading-order/next-to-next-to-leading-log resummed calculation. The comparisons show that, within their known limitations, all calculations predict the main features of the data, but no calculation adequately describes all aspects of the data. © 2011 American Physical Society.
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Search for first generation scalar leptoquarks in the eνjj channel in pp collisions at √s=7 TeV

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 703:3 (2011) 246-266

Authors:

S Chatrchyan, V Khachatryan, AM Sirunyan, A Tumasyan, W Adam, T Bergauer, M Dragicevic, J Erö, C Fabjan, M Friedl, R Frühwirth, VM Ghete, J Hammer, S Hänsel, M Hoch, N Hörmann, J Hrubec, M Jeitler, W Kiesenhofer, M Krammer, D Liko, I Mikulec, M Pernicka, H Rohringer, R Schöfbeck, J Strauss, A Taurok, F Teischinger, P Wagner, W Waltenberger, G Walzel, E Widl, CE Wulz, V Mossolov, N Shumeiko, J Suarez Gonzalez, S Bansal, L Benucci, EA De Wolf, X Janssen, J Maes, T Maes, L Mucibello, S Ochesanu, B Roland, R Rougny, M Selvaggi, H Van Haevermaet, P Van Mechelen, N Van Remortel, F Blekman, S Blyweert, J D'Hondt, O Devroede, R Gonzalez Suarez, A Kalogeropoulos, M Maes, W Van Doninck, P Van Mulders, GP Van Onsem, I Villella, O Charaf, B Clerbaux, G De Lentdecker, V Dero, APR Gay, GH Hammad, T Hreus, PE Marage, L Thomas, C Vander Velde, P Vanlaer, V Adler, A Cimmino, S Costantini, M Grunewald, B Klein, J Lellouch, A Marinov, J Mccartin, D Ryckbosch, F Thyssen, M Tytgat, L Vanelderen, P Verwilligen, S Walsh, N Zaganidis, S Basegmez, G Bruno, J Caudron, L Ceard, E Cortina Gil, J De Favereau De Jeneret, C Delaere, D Favart, A Giammanco, G Grégoire, J Hollar, V Lemaitre, J Liao

Abstract:

A search for pair-production of first generation scalar leptoquarks is performed in the final state containing an electron, a neutrino, and at least two jets using proton-proton collision data at √s=7 TeV. The data were collected by the CMS detector at the LHC, corresponding to an integrated luminosity of 36 pb-1. The number of observed events is in good agreement with the predictions for standard model processes. Prior CMS results in the dielectron channel are combined with this electron+neutrino search. A 95% confidence level combined lower limit is set on the mass of a first generation scalar leptoquark at 339 GeV for β=0.5, where β is the branching fraction of the leptoquark to an electron and a quark. These results represent the most stringent direct limits to date for values of β greater than 0.05. © 2011 CERN.
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Modeling of the HERMES submillimeter source lensed by a dark matter dominated foreground group of galaxies

Astrophysical Journal 738:2 (2011)

Authors:

R Gavazzi, A Cooray, A Conley, JE Aguirre, A Amblard, R Auld, A Beelen, A Blain, R Blundell, J Bock, CM Bradford, C Bridge, D Brisbin, D Burgarella, P Chanial, E Chapin, N Christopher, DL Clements, P Cox, SG Djorgovski, CD Dowell, S Eales, L Earle, TP Ellsworth-Bowers, D Farrah, A Franceschini, H Fu, J Glenn, EA González Solares, M Griffin, MA Gurwell, M Halpern, E Ibar, RJ Ivison, M Jarvis, J Kamenetzky, S Kim, M Krips, L Levenson, R Lupu, A Mahabal, PD Maloney, C Maraston, L Marchetti, G Marsden, H Matsuhara, AMJ Mortier, E Murphy, BJ Naylor, R Neri, HT Nguyen, SJ Oliver, A Omont, MJ Page, A Papageorgiou, CP Pearson, I Pérez-Fournon, M Pohlen, N Rangwala, JI Rawlings, G Raymond, D Riechers, G Rodighiero, IG Roseboom, M Rowan-Robinson, B Schulz, D Scott, KS Scott, P Serra, N Seymour, DL Shupe, AJ Smith, M Symeonidis, KE Tugwell, M Vaccari, E Valiante, I Valtchanov, A Verma, JD Vieira, L Vigroux, L Wang, J Wardlow, D Wiebe, G Wright, CK Xu, G Zeimann, M Zemcov, J Zmuidzinas

Abstract:

We present the results of a gravitational lensing analysis of the bright z s = 2.957 submillimeter galaxy (SMG) HERMES found in the Herschel/SPIRE science demonstration phase data from the Herschel Multi-tiered Extragalactic Survey (HerMES) project. The high-resolution imaging available in optical and near-IR channels, along with CO emission obtained with the Plateau de Bure Interferometer, allows us to precisely estimate the intrinsic source extension and hence estimate the total lensing magnification to be μ = 10.9 ± 0.7. We measure the half-light radius R eff of the source in the rest-frame near-UV and V bands that characterize the unobscured light coming from stars and find R eff, * = [2.0 ± 0.1] kpc, in good agreement with recent studies on the SMG population. This lens model is also used to estimate the size of the gas distribution (Reff, gas = [1.1 ± 0.5] kpc) by mapping back in the source plane the CO (J = 5 → 4) transition line emission. The lens modeling yields a relatively large Einstein radius R Ein = 4.″10 ± 0″.02, corresponding to a deflector velocity dispersion of [483 ± 16] km s -1. This shows that HERMES is lensed by a galaxy group-size dark matter halo at redshift z l ∼ 0.6. The projected dark matter contribution largely dominates the mass budget within the Einstein radius with f dm(< R Ein) ∼ 80%. This fraction reduces to f dm(< R eff, G1 ≃ 4.5 kpc) ∼ 47% within the effective radius of the main deflecting galaxy of stellar mass M *, G1 = [8.5 ± 1.6] × 1011 M ⊙. At this smaller scale the dark matter fraction is consistent with results already found for massive lensing ellipticals at z ∼ 0.2 from the Sloan Lens ACS Survey. © 2011. The American Astronomical Society. All rights reserved.
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