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Les Houches Physics at TeV Colliders 2005, Standard Model and Higgs working group: Summary report

(2006)

Authors:

C Buttar, S Dittmaier, V Drollinger, S Frixione, A Nikitenko, S Willenbrock S Abdullin, E Accomando, D Acosta, A Arbuzov, RD Ball, A Ballestrero, P Bartalini, U Baur, A Belhouari, S Belov, A Belyaev, D Benedetti, T Binoth, S Bolognesi, S Bondarenko, EE Boos, F Boudjema, A Bredenstein, VE Bunichev, C Buttar, JM Campbell, C Carloni Calame, S Catani, R Cavanaugh, M Ciccolini, J Collins, AM Cooper-Sarkar, G Corcella, S Cucciarelli, G Davatz, V DelDuca, A Denner, J D'Hondt, S Dittmaier, V Drollinger, A Drozdetskiy, LV Dudko, M Duehrssen, R Frazier, S Frixione, J Fujimoto, S Gascon-Shotkin, T Gehrmann, A Gehrmann-De Ridder, A Giammanco, A-S Giolo-Nicollerat, EWN Glover, RM Godbole, A Grau, M Grazzini, J-Ph Guillet, A Gusev, R Harlander, R Hegde, G Heinrich, J Heyninck, J Huston, T Ishikawa, A Kalinowski, T Kaneko, K Kato, N Kauer, W Kilgore, M Kirsanov, A Korytov, M Kraemer, A Kulesza, Y Kurihara, S Lehti, L Magnea, F Mahmoudi, E Maina, F Maltoni, C Mariotti, B Mellado, D Mercier, G Mitselmakher, G Montagna, A Moraes, M Moretti, S Moretti, I Nakano, P Nason, O Nicrosini, A Nikitenko, MR Nolten, F Olness, Yu Pakhotin, G Pancheri, F Piccinini, E Pilon, R Pittau, S Pozzorini, J Pumplin, W Quayle, DA Ross, R Sadykov, M Sandhoff, VI Savrin, A Schmidt, M Schulze, S Schumann, B Scurlock, A Sherstnev, P Skands, G Somogyi, J Smith, M Spira, Y Srivastava, H Stenzel, Y Sumino, R Tanaka, Z Trocsanyi, S Tsuno, A Vicini, D Wackeroth, MM Weber, C Weiser, S Willenbrock, SL Wu, M Zanetti
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Simulation of heavily irradiated silicon pixel detectors

Proceedings of the International Symposium on Detector Development for Particle, Astroparticle and Synchrotron Radiation Experiments (SNIC 2006) SLAC National Accelerator Laboratory (2006) 0014

Authors:

M Swartz, V Chiochia, Y Allkofer, C Amsler, Daniela Bortoletto, L Cremaldi, S Cucciarelli, A Dorokhov, C Hoermann, D Kim, M Konecki, D Kotlinski, K Prokofiev, C Regenfus, T Rohe, DA Sanders, S Son, T Speer

Abstract:

We show that doubly peaked electric fields are necessary to describe grazing-angle charge collection measurements of irradiated silicon pixel sensors. A model of irradiated silicon based upon two defect levels with opposite charge states and the trapping of charge carriers can be tuned to produce a good description of the measured charge collection profiles in the fluence range from 0.5x10^{14} Neq/cm^2 to 5.9x10^{14} Neq/cm^2. The model correctly predicts the variation in the profiles as the temperature is changed from -10C to -25C. The measured charge collection profiles are inconsistent with the linearly-varying electric fields predicted by the usual description based upon a uniform effective doping density. This observation calls into question the practice of using effective doping densities to characterize irradiated silicon. The model is now being used to calibrate pixel hit reconstruction algorithms for CMS.
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Results and status of the CRESST experiment

Journal of Physics: Conference Series 39:1 (2006) 75-81

Authors:

W Rau, G Angloher, I Bavykina, M Bauer, C Bucci, P Christ, C Coppi, C Cozzini, F Von Feilitzsch, D Hau, S Henry, C Isaila, T Jagemann, J Jochum, M Kimmerle, J Koenig, Hans Kraus, B Majorovits, V Mikhailik, J Ninković, E Pantić, F Petricca, W Potzel, F Pröbst, Y Ramachers

Abstract:

CRESST (Cryogenic Rare Event Search with Superconducting Thermometers) employs cryogenic detectors for the direct search for weakly interacting massive dark matter particles (WIMPs). In the second phase of the experiment scintillating calcium tungstate crystals are used to discriminate background by means of different light yield for background and WIMP signals. After first results with this novel technique have been obtained, the experimental setup is being upgraded for further background reduction and larger target mass. The results and present status of the experiment will be presented. © 2006 IOP Publishing Ltd.
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Two-photon width of the charmonium state χc2

Physical Review D American Physical Society (APS) 73:7 (2006) 071101

Authors:

S Dobbs, Z Metreveli, KK Seth, A Tomaradze, P Zweber, J Ernst, K Arms, H Severini, SA Dytman, W Love, S Mehrabyan, JA Mueller, V Savinov, Z Li, A Lopez, H Mendez, J Ramirez, GS Huang, DH Miller, V Pavlunin, B Sanghi, IPJ Shipsey, GS Adams, M Anderson, JP Cummings, I Danko, J Napolitano, Q He, H Muramatsu, CS Park, EH Thorndike, TE Coan, YS Gao, F Liu, M Artuso, C Boulahouache, S Blusk, J Butt, O Dorjkhaidav, J Li, N Menaa, R Mountain, K Randrianarivony, R Redjimi, R Sia, T Skwarnicki, S Stone, JC Wang, K Zhang, SE Csorna, G Bonvicini, D Cinabro, M Dubrovin, A Lincoln, A Bornheim, SP Pappas, AJ Weinstein, RA Briere, GP Chen, J Chen, T Ferguson, G Tatishvili, H Vogel, ME Watkins, JL Rosner, NE Adam, JP Alexander, K Berkelman, DG Cassel, JE Duboscq, KM Ecklund, R Ehrlich, L Fields, RS Galik, L Gibbons, R Gray, SW Gray, DL Hartill, BK Heltsley, D Hertz, CD Jones, J Kandaswamy, DL Kreinick, VE Kuznetsov, H Mahlke-Krüger, TO Meyer, PUE Onyisi, JR Patterson, D Peterson, EA Phillips, J Pivarski, D Riley, A Ryd, AJ Sadoff, H Schwarthoff, X Shi, MR Shepherd, S Stroiney, WM Sun, T Wilksen, M Weinberger, SB Athar, P Avery, L Breva-Newell, R Patel, V Potlia, H Stoeck, J Yelton, P Rubin, C Cawlfield, BI Eisenstein, I Karliner, D Kim, N Lowrey, P Naik, C Sedlack, M Selen, EJ White, J Williams, J Wiss, DM Asner, KW Edwards, D Besson, TK Pedlar, D Cronin-Hennessy, KY Gao, DT Gong, J Hietala, Y Kubota, T Klein, BW Lang, SZ Li, R Poling, AW Scott, A Smith
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Measurements of the exclusive decays of the upsilon(5S) to meson final states and improved B(s)* mass measurement.

Physical review letters 96:15 (2006) 152001

Authors:

O Aquines, Z Li, A Lopez, H Mendez, J Ramirez, GS Huang, DH Miller, V Pavlunin, B Sanghi, IPJ Shipsey, B Xin, GS Adams, M Anderson, JP Cummings, I Danko, J Napolitano, Q He, J Insler, H Muramatsu, CS Park, EH Thorndike, TE Coan, YS Gao, F Liu, R Stroynowski, M Artuso, S Blusk, J Butt, J Li, N Menaa, R Mountain, S Nisar, K Randrianarivony, R Redjimi, R Sia, T Skwarnicki, S Stone, JC Wang, K Zhang, SE Csorna, G Bonvicini, D Cinabro, M Dubrovin, A Lincoln, DM Asner, KW Edwards, RA Briere, I Brock, J Chen, T Ferguson, G Tatishvili, H Vogel, ME Watkins, JL Rosner, NE Adam, JP Alexander, K Berkelman, DG Cassel, JE Duboscq, KM Ecklund, R Ehrlich, L Fields, RS Galik, L Gibbons, R Gray, SW Gray, DL Hartill, BK Heltsley, D Hertz, CD Jones, J Kandaswamy, DL Kreinick, VE Kuznetsov, H Mahlke-Krüger, TO Meyer, PUE Onyisi, JR Patterson, D Peterson, EA Phillips, J Pivarski, D Riley, A Ryd, AJ Sadoff, H Schwarthoff, X Shi, S Stroiney, WM Sun, T Wilksen, M Weinberger, SB Athar, P Avery, L Breva-Newell, R Patel, V Potlia, H Stoeck, J Yelton, P Rubin, C Cawlfield, BI Eisenstein, I Karliner, D Kim, N Lowrey, P Naik, C Sedlack, M Selen, EJ White, J Wiss, MR Shepherd, D Besson, TK Pedlar, D Cronin-Hennessy, KY Gao, DT Gong, J Hietala, Y Kubota, T Klein, BW Lang, R Poling, AW Scott, A Smith, S Dobbs, Z Metreveli, KK Seth, A Tomaradze, P Zweber, J Ernst, K Arms, H Severini, SA Dytman, W Love, S Mehrabyan, V Savinov, CLEO Collaboration

Abstract:

Using 420 pb(-1) of data collected on the upsilon(5S) resonance with the CLEO III detector, we reconstruct B mesons in 25 exclusive decay channels to measure or set upper limits on the decay rate of upsilon(5S) into B meson final states. We measure the inclusive B cross section to be sigma(upsilon(5S) --> BB(X)) = (0.177 +/- 0.030 +/- 0.016) nb and make the first measurements of the production rates of sigma(upsilon(5S) --> B*B*) = (0.131 +/- 0.025 +/- 0.014) nb and sigma(upsilon(5S) --> BB*) = (0.043 +/- 0.016 +/- 0.006) nb, respectively. We set 90% confidence level limits of sigma(upsilon(5S) -->BB) < 0.038 nb, sigma(upsilon(5S) --> B(*)B(*)pi) < 0.055 nb and sigma(upsilon(5S) --> BBpipi) < 0.024 nb. We also extract the most precise value of the B(s)* mass to date, M(B(s)*) = (5411.7 +/- 1.6 +/- 0.6) MeV/c2.
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