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Time reconstruction and performance of the CMS electromagnetic calorimeter

Journal of Instrumentation 5:3 (2010)

Authors:

S Chatrchyan, V Khachatryan, AM Sirunyan, W Adam, B Arnold, H Bergauer, T Bergauer, M Dragicevic, M Eichberger, J Erö, M Friedl, R Frühwirth, VM Ghete, J Hammer, S Hansel, M Hoch, N Hörmann, J Hrubec, M Jeitler, G Kasieczka, K Kastner, M Krammer, D Liko, I De Magrans Abril, I Mikulec, F Mittermayr, B Neuherz, M Oberegger, M Padrta, M Pernicka, H Rohringer, S Schmid, R Schöfbeck, T Schreiner, R Stark, H Steininger, J Strauss, A Taurok, F Teischinger, T Themel, D Uhl, P Wagner, W Waltenberger, G Walzel, E Widl, CE Wulz, V Chekhovsky, O Dvornikov, I Emeliantchik, A Litomin, V Makarenko, I Marfin, V Mossolov, N Shumeiko, A Solin, R Stefanovitch, J Suarez Gonzalez, A Tikhonov, A Fedorov, A Karneyeu, M Korzhik, V Panov, R Zuyeuski, P Kuchinsky, W Beaumont, L Benucci, M Cardaci, EA De Wolf, E Delmeire, D Druzhkin, M Hashemi, X Janssen, T Maes, L Mucibello, S Ochesanu, R Rougny, M Selvaggi, H Van Haevermaet, P Van Mechelen, N Van Remortel, V Adler, S Beauceron, S Blyweert, J D'Hondt, S De Weirdt, O Devroede, J Heyninck, A Kalogeropoulos, J Maes, M Maes, MU Mozer, S Tavernier, W Van Doninck, P Van Mulders, I Villella, O Bouhali, EC Chabert, O Charaf, B Clerbaux, G De Lentdecker

Abstract:

The resolution and the linearity of time measurements made with the CMS electromagnetic calorimeter are studied with samples of data from test beam electrons, cosmic rays, and beam-produced muons. The resulting time resolution measured by lead tungstate crystals is better than 100 ps for energy deposits larger than 10 GeV. Crystal-to-crystal synchronization with a precision of 500 ps is performed using muons produced with the first LHC beams in 2008. © 2010 IOP Publishing Ltd and SISSA.
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When galaxies collide: understanding the broad absorption-line radio galaxy 4C +72.26

Monthly Notices of the Royal Astronomical Society 404:3 (2010) 1089-1099

Authors:

DJB Smith, C Simpson, AM Swinbank, S Rawlings, MJ Jarvis

Abstract:

We present a range of new observations of the 'broad absorption-line radio galaxy' 4C +72.26 (z≈ 3.5), including sensitive rest-frame ultraviolet integral field spectroscopy using the Gemini/GMOS-N instrument and Subaru/CISCO K-band imaging and spectroscopy. We show that 4C +72.26 is a system of two vigorously star-forming galaxies superimposed along the line of sight separated by ∼1300 ± 200 km s-1 in velocity, with each demonstrating spectroscopically resolved absorption lines. The most active star-forming galaxy also hosts the accreting supermassive black hole which powers the extended radio source. We conclude that the star formation is unlikely to have been induced by a shock caused by the passage of the radio jet, and instead propose that a collision is a more probable trigger for the star formation. Despite the massive starburst, the ultraviolet-mid-infrared spectral energy distribution suggests that the pre-existing stellar population comprises ∼1012 M⊙ of stellar mass, with the current burst only contributing a further ∼2 per cent, suggesting that 4C +72.26 has already assembled most of its final stellar mass. © 2010 The Authors. Journal compilation © 2010 RAS.
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Continuum surveys with LOFAR and synergy with future large surveys in the 1-2 GHz band

ArXiv e-prints (2010)

Authors:

R Morganti, H Rottgering, I Snellen, G Miley, P Barthel, P Best, M Bruggen, G Brunetti, K Chyzy, J Conway, M Jarvis, M Lehnert
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Herschel-ATLAS: Evolution of the 250 μm luminosity function out to z = 0.5

ASTRONOMY & ASTROPHYSICS 518 (2010) ARTN L10

Authors:

S Dye, L Dunne, S Eales, DJB Smith, A Amblard, R Auld, M Baes, IK Baldry, S Bamford, AW Blain, DG Bonfield, M Bremer, D Burgarella, S Buttiglione, E Cameron, A Cava, DL Clements, A Cooray, S Croom, A Dariush, G de Zotti, S Driver, JS Dunlop, D Frayer, J Fritz, Jonathan P Gardner, HL Gomez, J Gonzalez-Nuevo, D Herranz, D Hill, A Hopkins, E Ibar, RJ Ivison, MJ Jarvis, DH Jones, L Kelvin, G Lagache, L Leeuw, J Liske, M Lopez-Caniego, J Loveday, S Maddox, MJ Michalowski, M Negrello, P Norberg, MJ Page, H Parkinson, E Pascale, JA Peacock, M Pohlen, C Popescu, M Prescott, D Rigopoulou, A Robotham, E Rigby, G Rodighiero, S Samui, D Scott, S Serjeant, R Sharp, B Sibthorpe, P Temi, MA Thompson, R Tuffs, I Valtchanov, PP van der Werf, E van Kampen, A Verma
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Analysis of D+ → K- π+e+νe and D+ → K- π+μ+νμ semileptonic decays

PHYSICAL REVIEW D 81:11 (2010) ARTN 112001

Authors:

RA Briere, H Vogel, PUE Onyisi, JL Rosner, JP Alexander, DG Cassel, S Das, R Ehrlich, L Fields, L Gibbons, SW Gray, DL Hartill, BK Heltsley, JM Hunt, DL Kreinick, VE Kuznetsov, J Ledoux, JR Patterson, D Peterson, D Riley, A Ryd, AJ Sadoff, X Shi, WM Sun, J Yelton, P Rubin, N Lowrey, S Mehrabyan, M Selen, J Wiss, M Kornicer, RE Mitchell, MR Shepherd, CM Tarbert, D Besson, TK Pedlar, J Xavier, D Cronin-Hennessy, J Hietala, P Zweber, S Dobbs, Z Metreveli, KK Seth, X Ting, A Tomaradze, S Brisbane, J Libby, L Martin, A Powell, P Spradlin, G Wilkinson, H Mendez, JY Ge, DH Miller, IPJ Shipsey, B Xin, GS Adams, D Hu, B Moziak, J Napolitano, KM Ecklund, J Insler, H Muramatsu, CS Park, EH Thorndike, F Yang, S Ricciardi, C Thomas, M Artuso, S Blusk, S Khalil, R Mountain, T Skwarnicki, S Stone, JC Wang, LM Zhang, G Bonvicini, D Cinabro, A Lincoln, MJ Smith, P Zhou, J Zhu, P Naik, J Rademacker, DM Asner, KW Edwards, J Reed, K Randrianarivony, AN Robichaud, G Tatishvili, EJ White
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