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First Observations ofϒ(1S)→γπ+π−andϒ(1S)→γπ0π0

Physical Review Letters American Physical Society (APS) 82:2 (1999) 286-290

Authors:

A Anastassov, JE Duboscq, KK Gan, T Hart, K Honscheid, H Kagan, R Kass, J Lee, H Schwarthoff, A Wolf, MM Zoeller, SJ Richichi, H Severini, P Skubic, A Undrus, M Bishai, S Chen, J Fast, JW Hinson, N Menon, DH Miller, EI Shibata, IPJ Shipsey, S Glenn, Y Kwon, AL Lyon, S Roberts, EH Thorndike, CP Jessop, K Lingel, H Marsiske, ML Perl, V Savinov, D Ugolini, X Zhou, TE Coan, V Fadeyev, I Korolkov, Y Maravin, I Narsky, R Stroynowski, J Ye, T Wlodek, M Artuso, E Dambasuren, S Kopp, GC Moneti, R Mountain, S Schuh, T Skwarnicki, S Stone, A Titov, G Viehhauser, JC Wang, J Bartelt, SE Csorna, KW McLean, S Marka, Z Xu, R Godang, K Kinoshita, IC Lai, P Pomianowski, S Schrenk, G Bonvicini, D Cinabro, R Greene, LP Perera, GJ Zhou, S Chan, G Eigen, E Lipeles, JS Miller, M Schmidtler, A Shapiro, WM Sun, J Urheim, AJ Weinstein, F Würthwein, DE Jaffe, G Masek, HP Paar, EM Potter, S Prell, V Sharma, DM Asner, J Gronberg, TS Hill, DJ Lange, RJ Morrison, HN Nelson, TK Nelson, D Roberts, BH Behrens, WT Ford, A Gritsan, H Krieg, J Roy, JG Smith, JP Alexander, R Baker, C Bebek, BE Berger, K Berkelman, V Boisvert, DG Cassel, DS Crowcroft, M Dickson, S von Dombrowski, PS Drell, KM Ecklund, R Ehrlich, AD Foland, P Gaidarev, RS Galik, L Gibbons, B Gittelman, SW Gray, DL Hartill, BK Heltsley, PI Hopman, J Kandaswamy, DL Kreinick, T Lee, Y Liu, NB Mistry, CR Ng, E Nordberg, M Ogg, JR Patterson, D Peterson, D Riley, A Soffer, B Valant-Spaight, A Warburton, C Ward, M Athanas, P Avery, CD Jones, M Lohner, C Prescott, AI Rubiera, J Yelton, J Zheng, G Brandenburg, RA Briere, A Ershov, YS Gao, DY-J Kim, R Wilson, H Yamamoto, TE Browder, Y Li, JL Rodriguez, SK Sahu, T Bergfeld, BI Eisenstein, J Ernst, GE Gladding, GD Gollin, RM Hans, E Johnson, I Karliner, MA Marsh, M Palmer, M Selen, JJ Thaler, KW Edwards, A Bellerive, R Janicek, PM Patel, AJ Sadoff, R Ammar, P Baringer, A Bean, D Besson, D Coppage, C Darling, R Davis, S Kotov, I Kravchenko, N Kwak, L Zhou, S Anderson, Y Kubota, SJ Lee, R Mahapatra, JJ O'Neill, R Poling, T Riehle, A Smith, MS Alam, SB Athar, Z Ling, AH Mahmood, S Timm, F Wappler
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Aging study of a gas electron multiplier detector with microstrip gas chamber readout

IEEE Nuclear Science Symposium and Medical Imaging Conference 1 (1999) 598-602

Authors:

J Miyamoto, IPJ Shipsey

Abstract:

The aging behavior of wire chambers have been of great interest for many years. Recently a new generation of proportional chambers have been developed including the microstrip gas chamber (MSGC) microgap chamber (MGC) and gaseous electron multiplier (GEM). Aging studies of these detectors are of particular interest to the LHC (Large Hadron Collider) community because the baseline design of the CMS experiment includes MSGCs as part of the tracking system. We have performed an aging study of a GEM detector readout with a MSGC. The GEM is constructed from Kapton and copper, the MSGC is constructed from semiconductive glass and gold. When the detector is operated in argon and dimethyl ether (DME) gas mixture and irradiated with a 6 KeV photon beam, about 220 mC/cm of charge can be accumulated without degradation of the detector performance. This corresponds to about 20 years of operation at the LHC.

Event-building and PC farm based Level-3 trigger at the CDF experiment

Institute of Electrical and Electronics Engineers (IEEE) (1999) 28-32

Authors:

K Anikeev, G Bauer, IK Furic, D Holmgren, A Korn, I Kravchenko, M Mulhearn, P Ngan, C Paus, A Rakitine, R Rechenmacher, T Shah, P Sphicas, K Sumorok, S Tether, J Tseng
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Orbital modulation and longer term variability in the radio emission from Cygnus X-1

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 302:1 (1999) l1-l5

Authors:

GG Pooley, RP Fender, C Brocksopp
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A large-scale bulk flow of galaxy clusters

ASTROPHYSICAL JOURNAL 512:2 (1999) L79-L82

Authors:

MJ Hudson, RJ Smith, JR Lucey, DJ Schlegel, RL Davies
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