Massive molecular outflows and negative feedback in ULIRGs observed by herschel-pacs

Astrophysical Journal Letters 733:1 PART 2 (2011)

Authors:

E Sturm, E Gonzlez-Alfonso, S Veilleux, J Fischer, J Graci-Carpio, S Hailey-Dunsheath, A Contursi, A Poglitsch, A Sternberg, R Davies, R Genzel, D Lutz, L Tacconi, A Verma, R Maiolino, JA De Jong

Abstract:

Mass outflows driven by stars and active galactic nuclei (AGNs) are a key element in many current models of galaxy evolution. They may produce the observed black-hole-galaxy mass relation and regulate and quench both star formation in the host galaxy and black hole accretion. However, observational evidence of such feedback processes through outflows of the bulk of the star-forming molecular gas is still scarce. Here we report the detection of massive molecular outflows, traced by the hydroxyl molecule (OH), in far-infrared spectra of ULIRGs obtained with Herschel-PACS as part of the SHINING key project. In some of these objects the (terminal) outflow velocities exceed 1000kms-1, and their outflow rates (up to 1200 M yr -1) are several times larger than their star formation rates. We compare the outflow signatures in different types of ULIRGs and in starburst galaxies to address the issue of the energy source (AGN or starburst) of these outflows. We report preliminary evidence that ULIRGs with a higher AGN luminosity (and higher AGN contribution to L IR) have higher terminal velocities and shorter gas depletion timescales. The outflows in the observed ULIRGs are able to expel the cold gas reservoirs from the centers of these objects within 106-108 years. © 2011. The American Astronomical Society. All rights reserved.

Discovery of a multiply lensed submillimeter galaxy in early HerMES Herschel/SPIRE data

Astrophysical Journal Letters 732:2 PART II (2011)

Authors:

A Conley, A Cooray, JD Vieira, EAG Solares, S Kim, JE Aguirre, A Amblard, R Auld, AJ Baker, A Beelen, A Blain, R Blundell, J Bock, CM Bradford, C Bridge, D Brisbin, D Burgarella, JM Carpenter, 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, D Frayer, H Fu, R Gavazzi, J Glenn, M Griffin, MA Gurwell, M Halpern, E Ibar, RJ Ivison, M Jarvis, J Kamenetzky, 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, K Scott, P Serra, N Seymour, DL Shupe, AJ Smith, M Symeonidis, KE Tugwell, M Vaccari, E Valiante, I Valtchanov, A Verma, MP Viero, L Vigroux, L Wang, D Wiebe, G Wright, CK Xu, G Zeimann, M Zemcov, J Zmuidzinas

Abstract:

We report the discovery of a bright (f (250 μm)>400 mJy), multiply lensed submillimeter galaxy HERMES J105751.1+573027 in Herschel/SPIRE Science Demonstration Phase data from the HerMES project. Interferometric 880 μm Submillimeter Array observations resolve at least four images with a large separation of ∼9″. A high-resolution adaptive optics Kp image with Keck/NIRC2 clearly shows strong lensing arcs. Follow-up spectroscopy gives a redshift of z = 2.9575, and the lensing model gives a total magnification of μ ∼ 11 ± 1. The large image separation allows us to study the multi-wavelength spectral energy distribution (SED) of the lensed source unobscured by the central lensing mass. The far-IR/millimeter-wave SED is well described by a modified blackbody fit with an unusually warm dust temperature, 88 ± 3 K. We derive a lensing-corrected total IR luminosity of (1.43 ± 0.09) × 1013 L⊙, implying a star formation rate of ∼2500 M⊙ yr-1. However, models primarily developed from brighter galaxies selected at longer wavelengths are a poor fit to the full optical-to-millimeter SED. A number of other strongly lensed systems have already been discovered in early Herschel data, and many more are expected as additional data are collected. © 2011. The American Astronomical Society. All rights reserved.

Measurement of dijet azimuthal decorrelations in pp collisions at sqrt(s)=7  TeV.

Phys Rev Lett 106:17 (2011) 172002

Authors:

G Aad, B Abbott, J Abdallah, AA Abdelalim, A Abdesselam, O Abdinov, B Abi, M Abolins, H Abramowicz, H Abreu, E Acerbi, BS Acharya, DL Adams, TN Addy, J Adelman, M Aderholz, S Adomeit, P Adragna, T Adye, S Aefsky, JA Aguilar-Saavedra, M Aharrouche, SP Ahlen, F Ahles, A Ahmad, M Ahsan, G Aielli, T Akdogan, TPA Åkesson, G Akimoto, AV Akimov, MS Alam, MA Alam, S Albrand, M Aleksa, IN Aleksandrov, M Aleppo, F Alessandria, C Alexa, G Alexander, G Alexandre, T Alexopoulos, M Alhroob, M Aliev, G Alimonti, J Alison, M Aliyev, PP Allport, SE Allwood-Spiers, J Almond, A Aloisio, R Alon, A Alonso, MG Alviggi, K Amako, P Amaral, C Amelung, VV Ammosov, A Amorim, G Amorós, N Amram, C Anastopoulos, T Andeen, CF Anders, KJ Anderson, A Andreazza, V Andrei, M-L Andrieux, XS Anduaga, A Angerami, F Anghinolfi, N Anjos, A Annovi, A Antonaki, M Antonelli, S Antonelli, A Antonov, J Antos, F Anulli, S Aoun, L Aperio Bella, R Apolle, G Arabidze, I Aracena, Y Arai, ATH Arce, JP Archambault, S Arfaoui, J-F Arguin, E Arik, M Arik, AJ Armbruster, O Arnaez, C Arnault, A Artamonov, G Artoni, D Arutinov, S Asai, R Asfandiyarov, S Ask, B Åsman, L Asquith, K Assamagan, A Astbury, A Astvatsatourov, G Atoian, B Aubert, B Auerbach, E Auge, K Augsten, M Aurousseau, N Austin, R Avramidou, D Axen, C Ay, G Azuelos, Y Azuma, MA Baak, G Baccaglioni, C Bacci, AM Bach, H Bachacou, K Bachas, G Bachy, M Backes, M Backhaus, E Badescu, P Bagnaia, S Bahinipati, Y Bai, DC Bailey, T Bain, JT Baines, OK Baker, MD Baker, S Baker, F Baltasar Dos Santos Pedrosa, E Banas, P Banerjee, Sw Banerjee, D Banfi, A Bangert, V Bansal, HS Bansil, L Barak, SP Baranov, A Barashkou, A Barbaro Galtieri, T Barber, EL Barberio, D Barberis, M Barbero, DY Bardin, T Barillari, M Barisonzi, T Barklow, N Barlow, BM Barnett, RM Barnett, A Baroncelli, AJ Barr, F Barreiro, J Barreiro Guimarães da Costa, P Barrillon, R Bartoldus, AE Barton, D Bartsch, V Bartsch, RL Bates, L Batkova, JR Batley, A Battaglia, M Battistin, G Battistoni, F Bauer, HS Bawa, B Beare, T Beau, PH Beauchemin, R Beccherle, P Bechtle, HP Beck, M Beckingham, KH Becks, AJ Beddall, A Beddall, VA Bednyakov, CP Bee, M Begel, S Behar Harpaz, PK Behera, M Beimforde, C Belanger-Champagne, PJ Bell, WH Bell, G Bella, L Bellagamba, F Bellina, G Bellomo, M Bellomo, A Belloni, O Beloborodova, K Belotskiy, O Beltramello, S Ben Ami, O Benary, D Benchekroun, C Benchouk, M Bendel, BH Benedict, N Benekos, Y Benhammou, DP Benjamin, M Benoit, JR Bensinger, K Benslama, S Bentvelsen, D Berge, E Bergeaas Kuutmann, N Berger, F Berghaus, E Berglund, J Beringer, K Bernardet, P Bernat, R Bernhard, C Bernius, T Berry, A Bertin, F Bertinelli, F Bertolucci, MI Besana, N Besson, S Bethke, W Bhimji, RM Bianchi, M Bianco, O Biebel, SP Bieniek, J Biesiada, M Biglietti, H Bilokon, M Bindi, S Binet, A Bingul, C Bini, C Biscarat, U Bitenc, KM Black, RE Blair, J-B Blanchard, G Blanchot, C Blocker, J Blocki, A Blondel, W Blum, U Blumenschein, GJ Bobbink, VB Bobrovnikov, A Bocci, CR Boddy, M Boehler, J Boek, N Boelaert, S Böser, JA Bogaerts, A Bogdanchikov, A Bogouch, C Bohm, V Boisvert, T Bold, V Boldea, M Bona, VG Bondarenko, M Boonekamp, G Boorman, CN Booth, P Booth, S Bordoni, C Borer, A Borisov, G Borissov, I Borjanovic, S Borroni, K Bos, D Boscherini, M Bosman, H Boterenbrood, D Botterill, J Bouchami, J Boudreau, EV Bouhova-Thacker, C Boulahouache, C Bourdarios, N Bousson, A Boveia, J Boyd, IR Boyko, NI Bozhko, I Bozovic-Jelisavcic, J Bracinik, A Braem, E Brambilla, P Branchini, GW Brandenburg, A Brandt, G Brandt, O Brandt, U Bratzler, B Brau, JE Brau, HM Braun, B Brelier, J Bremer, R Brenner, S Bressler, D Breton, ND Brett, PG Bright-Thomas, D Britton, FM Brochu, I Brock, R Brock, TJ Brodbeck, E Brodet, F Broggi, C Bromberg, G Brooijmans, WK Brooks, G Brown, E Brubaker, PA Bruckman de Renstrom, D Bruncko, R Bruneliere, S Brunet, A Bruni, G Bruni, M Bruschi, T Buanes, F Bucci, J Buchanan, NJ Buchanan, P Buchholz, RM Buckingham, AG Buckley, SI Buda, IA Budagov, B Budick, V Büscher, L Bugge, D Buira-Clark, EJ Buis, O Bulekov, M Bunse, T Buran, H Burckhart, S Burdin, T Burgess, S Burke, E Busato, P Bussey, CP Buszello, F Butin, B Butler, JM Butler, CM Buttar, JM Butterworth, W Buttinger, T Byatt, S Cabrera Urbán, M Caccia, D Caforio, O Cakir, P Calafiura, G Calderini, P Calfayan, R Calkins, LP Caloba, R Caloi, D Calvet, S Calvet, R Camacho Toro, A Camard, P Camarri, M Cambiaghi, D Cameron, J Cammin, S Campana, M Campanelli, V Canale, F Canelli, A Canepa, J Cantero, L Capasso, MDM Capeans Garrido, I Caprini, M Caprini, D Capriotti, M Capua, R Caputo, C Caramarcu, R Cardarelli, T Carli, G Carlino, L Carminati, B Caron, S Caron, C Carpentieri, GD Carrillo Montoya, AA Carter, JR Carter, J Carvalho, D Casadei, MP Casado, M Cascella, C Caso, AM Castaneda Hernandez, E Castaneda-Miranda, V Castillo Gimenez, NF Castro, G Cataldi, F Cataneo, A Catinaccio, JR Catmore, A Cattai, G Cattani, S Caughron, D Cauz, A Cavallari, P Cavalleri, D Cavalli, M Cavalli-Sforza, V Cavasinni, A Cazzato, F Ceradini, AS Cerqueira, A Cerri, L Cerrito, F Cerutti, SA Cetin, F Cevenini, A Chafaq, D Chakraborty, K Chan, B Chapleau, JD Chapman, JW Chapman, E Chareyre, DG Charlton, V Chavda, S Cheatham, S Chekanov, SV Chekulaev, GA Chelkov, H Chen, L Chen, S Chen, T Chen, X Chen, S Cheng, A Cheplakov, VF Chepurnov, R Cherkaoui El Moursli, V Chernyatin, E Cheu, SL Cheung, L Chevalier, F Chevallier, G Chiefari, L Chikovani, JT Childers, A Chilingarov, G Chiodini, MV Chizhov, G Choudalakis, S Chouridou, IA Christidi, A Christov, D Chromek-Burckhart, ML Chu, J Chudoba, G Ciapetti, K Ciba, AK Ciftci, R Ciftci, D Cinca, V Cindro, MD Ciobotaru, C Ciocca, A Ciocio, M Cirilli, M Ciubancan, A Clark, PJ Clark, W Cleland, JC Clemens, B Clement, C Clement, RW Clifft, Y Coadou, M Cobal, A Coccaro, J Cochran, P Coe, JG Cogan, J Coggeshall, E Cogneras, CD Cojocaru, J Colas, AP Colijn, C Collard, NJ Collins, C Collins-Tooth, J Collot, G Colon, R Coluccia, G Comune, P Conde Muiño, E Coniavitis, MC Conidi, M Consonni, S Constantinescu, C Conta, F Conventi, J Cook, M Cooke, BD Cooper, AM Cooper-Sarkar, NJ Cooper-Smith, K Copic, T Cornelissen, M Corradi, F Corriveau, A Cortes-Gonzalez, G Cortiana, G Costa, MJ Costa, D Costanzo, T Costin, D Côté, R Coura Torres, L Courneyea, G Cowan, C Cowden, BE Cox, K Cranmer, M Cristinziani, G Crosetti, R Crupi, S Crépé-Renaudin, C Cuenca Almenar, T Cuhadar Donszelmann, S Cuneo, M Curatolo, CJ Curtis, P Cwetanski, H Czirr, Z Czyczula, S D'Auria, M D'Onofrio, A D'Orazio, A Da Rocha Gesualdi Mello, PVM Da Silva, C Da Via, W Dabrowski, A Dahlhoff, T Dai, C Dallapiccola, SJ Dallison, M Dam, M Dameri, DS Damiani, HO Danielsson, R Dankers, D Dannheim, V Dao, G Darbo, GL Darlea, C Daum, JP Dauvergne, W Davey, T Davidek, N Davidson, R Davidson, M Davies, AR Davison, E Dawe, I Dawson, JW Dawson, RK Daya, K De, R de Asmundis, S De Castro, PE De Castro Faria Salgado, S De Cecco, J de Graat, N De Groot, P de Jong, C De La Taille, B De Lotto, L De Mora, L De Nooij, M De Oliveira Branco, D De Pedis, P de Saintignon, A De Salvo, U De Sanctis, A De Santo, JB De Vivie De Regie, S Dean, DV Dedovich, J Degenhardt, M Dehchar, M Deile, C Del Papa, J Del Peso, T Del Prete, A Dell'Acqua, L Dell'Asta, M Della Pietra, D della Volpe, M Delmastro, P Delpierre, N Delruelle, PA Delsart, C Deluca, S Demers, M Demichev, B Demirkoz, J Deng, SP Denisov, D Derendarz, JE Derkaoui, F Derue, P Dervan, K Desch, E Devetak, PO Deviveiros, A Dewhurst, B DeWilde, S Dhaliwal, R Dhullipudi, A Di Ciaccio, L Di Ciaccio, A Di Girolamo, B Di Girolamo, S Di Luise, A Di Mattia, B Di Micco, R Di Nardo, A Di Simone, R Di Sipio, MA Diaz, F Diblen, EB Diehl, H Dietl, J Dietrich, TA Dietzsch, S Diglio, K Dindar Yagci, J Dingfelder, C Dionisi, P Dita, S Dita, F Dittus, F Djama, R Djilkibaev, T Djobava, MAB do Vale, A Do Valle Wemans, TKO Doan, M Dobbs, R Dobinson, D Dobos, E Dobson, M Dobson, J Dodd, OB Dogan, C Doglioni, T Doherty, Y Doi, J Dolejsi, I Dolenc, Z Dolezal, BA Dolgoshein, T Dohmae, M Donadelli, M Donega, J Donini, J Dopke, A Doria, A Dos Anjos, M Dosil, A Dotti, MT Dova, JD Dowell, AD Doxiadis, AT Doyle, Z Drasal, J Drees, N Dressnandt, H Drevermann, C Driouichi, M Dris, JG Drohan, J Dubbert, T Dubbs, S Dube, E Duchovni, G Duckeck, A Dudarev, F Dudziak, M Dührssen, IP Duerdoth, L Duflot, M-A Dufour, M Dunford, H Duran Yildiz, R Duxfield, M Dwuznik, F Dydak, D Dzahini, M Düren, WL Ebenstein, J Ebke, S Eckert, S Eckweiler, K Edmonds, CA Edwards, I Efthymiopoulos, W Ehrenfeld, T Ehrich, T Eifert, G Eigen, K Einsweiler, E Eisenhandler, T Ekelof, M El Kacimi, M Ellert, S Elles, F Ellinghaus, K Ellis, N Ellis, J Elmsheuser, M Elsing, R Ely, D Emeliyanov, R Engelmann, A Engl, B Epp, A Eppig, J Erdmann, A Ereditato, D Eriksson, J Ernst, M Ernst, J Ernwein, D Errede, S Errede, E Ertel, M Escalier, C Escobar, X Espinal Curull, B Esposito, F Etienne, AI Etienvre, E Etzion, D Evangelakou, H Evans, L Fabbri, C Fabre, K Facius, RM Fakhrutdinov, S Falciano, AC Falou, Y Fang, M Fanti, A Farbin, A Farilla, J Farley, T Farooque, SM Farrington, P Farthouat, D Fasching, P Fassnacht, D Fassouliotis, B Fatholahzadeh, A Favareto, L Fayard, S Fazio, R Febbraro, P Federic, OL Fedin, I Fedorko, W Fedorko, M Fehling-Kaschek, L Feligioni, D Fellmann, CU Felzmann, C Feng, EJ Feng, AB Fenyuk, J Ferencei, J Ferland, B Fernandes, W Fernando, S Ferrag, J Ferrando, V Ferrara, A Ferrari, P Ferrari, R Ferrari, A Ferrer, ML Ferrer, D Ferrere, C Ferretti, A Ferretto Parodi, M Fiascaris, F Fiedler, A Filipčič, A Filippas, F Filthaut, M Fincke-Keeler, MCN Fiolhais, L Fiorini, A Firan, G Fischer, P Fischer, MJ Fisher, SM Fisher, J Flammer, M Flechl, I Fleck, J Fleckner, P Fleischmann, S Fleischmann, T Flick, LR Flores Castillo, MJ Flowerdew, F Föhlisch, M Fokitis, T Fonseca Martin, DA Forbush, A Formica, A Forti, D Fortin, JM Foster, D Fournier, A Foussat, AJ Fowler, K Fowler, H Fox, P Francavilla, S Franchino, D Francis, T Frank, M Franklin, S Franz, M Fraternali, S Fratina, ST French, R Froeschl, D Froidevaux, JA Frost, C Fukunaga, E Fullana Torregrosa, J Fuster, C Gabaldon, O Gabizon, T Gadfort, S Gadomski, G Gagliardi, P Gagnon, C Galea, EJ Gallas, MV Gallas, V Gallo, BJ Gallop, P Gallus, E Galyaev, KK Gan, YS Gao, VA Gapienko, A Gaponenko, F Garberson, M Garcia-Sciveres, C García, JE García Navarro, RW Gardner, N Garelli, H Garitaonandia, V Garonne, J Garvey, C Gatti, G Gaudio, O Gaumer, B Gaur, L Gauthier, IL Gavrilenko, C Gay, G Gaycken, J-C Gayde, EN Gazis, P Ge, CNP Gee, DAA Geerts, Ch Geich-Gimbel, K Gellerstedt, C Gemme, A Gemmell, MH Genest, S Gentile, S George, P Gerlach, A Gershon, C Geweniger, H Ghazlane, P Ghez, N Ghodbane, B Giacobbe, S Giagu, V Giakoumopoulou, V Giangiobbe, F Gianotti, B Gibbard, A Gibson, SM Gibson, GF Gieraltowski, LM Gilbert, M Gilchriese, V Gilewsky, D Gillberg, AR Gillman, DM Gingrich, J Ginzburg, N Giokaris, R Giordano, FM Giorgi, P Giovannini, PF Giraud, D Giugni, P Giusti, BK Gjelsten, LK Gladilin, C Glasman, J Glatzer, A Glazov, KW Glitza, GL Glonti, J Godfrey, J Godlewski, M Goebel, T Göpfert, C Goeringer, C Gössling, T Göttfert, S Goldfarb, D Goldin, T Golling, SN Golovnia, A Gomes, LS Gomez Fajardo, R Gonçalo, L Gonella, A Gonidec, S Gonzalez, S González de la Hoz, ML Gonzalez Silva, S Gonzalez-Sevilla, JJ Goodson, L Goossens, PA Gorbounov, HA Gordon, I Gorelov, G Gorfine, B Gorini, E Gorini, A Gorišek, E Gornicki, SA Gorokhov, VN Goryachev, B Gosdzik, M Gosselink, MI Gostkin, M Gouanère, I Gough Eschrich, M Gouighri, D Goujdami, MP Goulette, AG Goussiou, C Goy, I Grabowska-Bold, V Grabski, P Grafström, C Grah, K-J Grahn, F Grancagnolo, S Grancagnolo, V Grassi, V Gratchev, N Grau, HM Gray, JA Gray, E Graziani, OG Grebenyuk, D Greenfield, T Greenshaw, ZD Greenwood, IM Gregor, P Grenier, E Griesmayer, J Griffiths, N Grigalashvili, AA Grillo, S Grinstein, PLY Gris, YV Grishkevich, J-F Grivaz, J Grognuz, M Groh, E Gross, J Grosse-Knetter, J Groth-Jensen, M Gruwe, K Grybel, VJ Guarino, D Guest, C Guicheney, A Guida, T Guillemin, S Guindon, H Guler, J Gunther, B Guo, J Guo, A Gupta, Y Gusakov, VN Gushchin, A Gutierrez, P Gutierrez, N Guttman, O Gutzwiller, C Guyot, C Gwenlan, CB Gwilliam, A Haas, S Haas, C Haber, R Hackenburg, HK Hadavand, DR Hadley, P Haefner, F Hahn, S Haider, Z Hajduk, H Hakobyan, J Haller, K Hamacher, P Hamal, A Hamilton, S Hamilton, H Han, L Han, K Hanagaki, M Hance, C Handel, P Hanke, CJ Hansen, JR Hansen, JB Hansen, JD Hansen, PH Hansen, P Hansson, K Hara, GA Hare, T Harenberg, D Harper, RD Harrington, OM Harris, K Harrison, J Hartert, F Hartjes, T Haruyama, A Harvey, S Hasegawa, Y Hasegawa, S Hassani, M Hatch, D Hauff, S Haug, M Hauschild, R Hauser, M Havranek, BM Hawes, CM Hawkes, RJ Hawkings, D Hawkins, T Hayakawa, D Hayden, HS Hayward, SJ Haywood, E Hazen, M He, SJ Head, V Hedberg, L Heelan, S Heim, B Heinemann, S Heisterkamp, L Helary, M Heldmann, M Heller, S Hellman, C Helsens, RCW Henderson, M Henke, A Henrichs, AM Henriques Correia, S Henrot-Versille, F Henry-Couannier, C Hensel, T Henss, Y Hernández Jiménez, R Herrberg, AD Hershenhorn, G Herten, R Hertenberger, L Hervas, NP Hessey, A Hidvegi, E Higón-Rodriguez, D Hill, JC Hill, N Hill, KH Hiller, S Hillert, SJ Hillier, I Hinchliffe, E Hines, M Hirose, F Hirsch, D Hirschbuehl, J Hobbs, N Hod, MC Hodgkinson, P Hodgson, A Hoecker, MR Hoeferkamp, J Hoffman, D Hoffmann, M Hohlfeld, M Holder, A Holmes, SO Holmgren, T Holy, JL Holzbauer, Y Homma, L Hooft van Huysduynen, T Horazdovsky, C Horn, S Horner, K Horton, J-Y Hostachy, T Hott, S Hou, MA Houlden, A Hoummada, J Howarth, DF Howell, I Hristova, J Hrivnac, I Hruska, T Hryn'ova, PJ Hsu, S-C Hsu, GS Huang, Z Hubacek, F Hubaut, F Huegging, TB Huffman, EW Hughes, G Hughes, RE Hughes-Jones, M Huhtinen, P Hurst, M Hurwitz, U Husemann, N Huseynov, J Huston, J Huth, G Iacobucci, G Iakovidis, M Ibbotson, I Ibragimov, R Ichimiya, L Iconomidou-Fayard, J Idarraga, M Idzik, P Iengo, O 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Tonoyan, C Topfel, ND Topilin, I Torchiani, E Torrence, E Torró Pastor, J Toth, F Touchard, DR Tovey, D Traynor, T Trefzger, J Treis, L Tremblet, A Tricoli, IM Trigger, S Trincaz-Duvoid, TN Trinh, MF Tripiana, N Triplett, W Trischuk, A Trivedi, B Trocmé, C Troncon, M Trottier-McDonald, A Trzupek, C Tsarouchas, JC-L Tseng, M Tsiakiris, PV Tsiareshka, D Tsionou, G Tsipolitis, V Tsiskaridze, EG Tskhadadze, II Tsukerman, V Tsulaia, J-W Tsung, S Tsuno, D Tsybychev, A Tua, JM Tuggle, M Turala, D Turecek, I Turk Cakir, E Turlay, PM Tuts, A Tykhonov, M Tylmad, M Tyndel, D Typaldos, H Tyrvainen, G Tzanakos, K Uchida, I Ueda, R Ueno, M Ugland, M Uhlenbrock, M Uhrmacher, F Ukegawa, G Unal, DG Underwood, A Undrus, G Unel, Y Unno, D Urbaniec, E Urkovsky, P Urquijo, P Urrejola, G Usai, M Uslenghi, L Vacavant, V Vacek, B Vachon, S Vahsen, C Valderanis, J Valenta, P Valente, S Valentinetti, S Valkar, E Valladolid Gallego, S Vallecorsa, JA Valls Ferrer, H van der Graaf, E van der Kraaij, R Van Der Leeuw, E van der Poel, D van der Ster, B Van Eijk, N van Eldik, P van Gemmeren, Z van Kesteren, I van Vulpen, W Vandelli, G Vandoni, A Vaniachine, P Vankov, F Vannucci, F Varela Rodriguez, R Vari, EW Varnes, D Varouchas, A Vartapetian, KE Varvell, VI Vassilakopoulos, F Vazeille, G Vegni, JJ Veillet, C Vellidis, F Veloso, R Veness, S Veneziano, A Ventura, D Ventura, M Venturi, N Venturi, V Vercesi, M Verducci, W Verkerke, JC Vermeulen, A Vest, MC Vetterli, I Vichou, T Vickey, GHA Viehhauser, S Viel, M Villa, M Villaplana Perez, E Vilucchi, MG Vincter, E Vinek, VB Vinogradov, M Virchaux, S Viret, J Virzi, A Vitale, O Vitells, M Viti, I Vivarelli, F Vives Vaque, S Vlachos, M Vlasak, N Vlasov, A Vogel, P Vokac, M Volpi, G Volpini, H von der Schmitt, J von Loeben, H von Radziewski, E von Toerne, V Vorobel, AP Vorobiev, V Vorwerk, M Vos, R Voss, TT Voss, JH Vossebeld, AS Vovenko, N Vranjes, M Vranjes Milosavljevic, V Vrba, M Vreeswijk, T Vu Anh, R Vuillermet, I Vukotic, W Wagner, P Wagner, H Wahlen, J Wakabayashi, J Walbersloh, S Walch, J Walder, R Walker, W Walkowiak, R Wall, P Waller, C Wang, H Wang, J Wang, J Wang, JC Wang, R Wang, SM Wang, A Warburton, CP Ward, M Warsinsky, PM Watkins, AT Watson, MF Watson, G Watts, S Watts, AT Waugh, BM Waugh, J Weber, M Weber, MS Weber, P Weber, AR Weidberg, P Weigell, J Weingarten, C Weiser, H Wellenstein, PS Wells, M Wen, T Wenaus, S Wendler, Z Weng, T Wengler, S Wenig, N Wermes, M Werner, P Werner, M Werth, M Wessels, K Whalen, SJ Wheeler-Ellis, SP Whitaker, A White, MJ White, S White, SR Whitehead, D Whiteson, D Whittington, F Wicek, D Wicke, FJ Wickens, W Wiedenmann, M Wielers, P Wienemann, C Wiglesworth, LAM Wiik, PA Wijeratne, A Wildauer, MA Wildt, I Wilhelm, HG Wilkens, JZ Will, E Williams, HH Williams, W Willis, S Willocq, JA Wilson, MG Wilson, A Wilson, I Wingerter-Seez, S Winkelmann, F Winklmeier, M Wittgen, MW Wolter, H Wolters, G Wooden, BK Wosiek, J Wotschack, MJ Woudstra, K Wraight, C Wright, B Wrona, SL Wu, X Wu, Y Wu, E Wulf, R Wunstorf, BM Wynne, L Xaplanteris, S Xella, S Xie, Y Xie, C Xu, D Xu, G Xu, B Yabsley, M Yamada, A Yamamoto, K Yamamoto, S Yamamoto, T Yamamura, J Yamaoka, T Yamazaki, Y Yamazaki, Z Yan, H Yang, UK Yang, Y Yang, Y Yang, Z Yang, S Yanush, W-M Yao, Y Yao, Y Yasu, GV Ybeles Smit, J Ye, S Ye, M Yilmaz, R Yoosoofmiya, K Yorita, R Yoshida, C Young, S Youssef, D Yu, J Yu, J Yu, L Yuan, A Yurkewicz, VG Zaets, R Zaidan, AM Zaitsev, Z Zajacova, Yo K Zalite, L Zanello, P Zarzhitsky, A Zaytsev, C Zeitnitz, M Zeller, PF Zema, A Zemla, C Zendler, AV Zenin, O Zenin, T Zeniš, Z Zenonos, S Zenz, D Zerwas, G Zevi Della Porta, Z Zhan, D Zhang, H Zhang, J Zhang, X Zhang, Z Zhang, L Zhao, T Zhao, Z Zhao, A Zhemchugov, S Zheng, J Zhong, B Zhou, N Zhou, Y Zhou, CG Zhu, H Zhu, Y Zhu, X Zhuang, V Zhuravlov, D Zieminska, B Zilka, R Zimmermann, S Zimmermann, S Zimmermann, M Ziolkowski, R Zitoun, L Zivković, VV Zmouchko, G Zobernig, A Zoccoli, Y Zolnierowski, A Zsenei, M zur Nedden, V Zutshi, L Zwalinski, ATLAS Collaboration

Abstract:

Azimuthal decorrelations between the two central jets with the largest transverse momenta are sensitive to the dynamics of events with multiple jets. We present a measurement of the normalized differential cross section based on the full data set (∫Ldt=36  pb(-1)) acquired by the ATLAS detector during the 2010 sqrt(s)=7  TeV proton-proton run of the LHC. The measured distributions include jets with transverse momenta up to 1.3 TeV, probing perturbative QCD in a high-energy regime.

Measurement of the WW cross section in sqrt(s) = 7 TeV pp collisions with ATLAS

ArXiv 1104.5225 (2011)

Measurement of the production cross section for W-bosons in association with jets in pp collisions at √s=7 TeV with the ATLAS detector

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 698:5 (2011) 325-345

Authors:

G Aad, B Abbott, J Abdallah, AA Abdelalim, A Abdesselam, O Abdinov, B Abi, M Abolins, H Abramowicz, H Abreu, E Acerbi, BS Acharya, M Ackers, DL Adams, TN Addy, J Adelman, M Aderholz, S Adomeit, P Adragna, T Adye, S Aefsky, JA Aguilar-Saavedra, M Aharrouche, SP Ahlen, F Ahles, A Ahmad, M Ahsan, G Aielli, T Akdogan, TPA Åkesson, G Akimoto, AV Akimov, MS Alam, MA Alam, S Albrand, M Aleksa, IN Aleksandrov, M Aleppo, F Alessandria, C Alexa, G Alexander, G Alexandre, T Alexopoulos, M Alhroob, M Aliev, G Alimonti, J Alison, M Aliyev, PP Allport, SE Allwood-Spiers, J Almond, A Aloisio, R Alon, A Alonso, J Alonso, MG Alviggi, K Amako, P Amaral, C Amelung, VV Ammosov, A Amorim, G Amorós, N Amram, C Anastopoulos, T Andeen, CF Anders, KJ Anderson, A Andreazza, V Andrei, ML Andrieux, XS Anduaga, A Angerami, F Anghinolfi, N Anjos, A Annovi, A Antonaki, M Antonelli, S Antonelli, J Antos, F Anulli, S Aoun, L Aperio Bella, R Apolle, G Arabidze, I Aracena, Y Arai, ATH Arce, JP Archambault, S Arfaoui, JF Arguin, E Arik, M Arik, AJ Armbruster, KE Arms, SR Armstrong, O Arnaez, C Arnault, A Artamonov, G Artoni, D Arutinov

Abstract:

This Letter reports on a first measurement of the inclusive W+jets cross section in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC, with the ATLAS detector. Cross sections, in both the electron and muon decay modes of the W-boson, are presented as a function of jet multiplicity and of the transverse momentum of the leading and next-to-leading jets in the event. Measurements are also presented of the ratio of cross sections σ(W+≥n)/σ(W+≥n-1) for inclusive jet multiplicities n=1-4. The results, based on an integrated luminosity of 1.3 pb-1, have been corrected for all known detector effects and are quoted in a limited and well-defined range of jet and lepton kinematics. The measured cross sections are compared to particle-level predictions based on perturbative QCD. Next-to-leading order calculations, studied here for n≤2, are found in good agreement with the data. Leading-order multiparton event generators, normalized to the NNLO total cross section, describe the data well for all measured jet multiplicities. © 2011 CERN Elsevier B.V.