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Beetle - a radiation hard readout chip for the LHCb experiment

NUCL INSTRUM METH A 518:1-2 (2004) 468-469

Authors:

M Agari, N van Bakel, C Bauer, D Baumeister, M van Beuzekom, M Feuerstack-Raible, N Harnew, W Hofmann, E Jans, S Klous, KT Knopfle, S Lochner, M Schmelling, E Sexauer, N Smale, U Trunk, H Verkooijen

Abstract:

A new radiation hard pipelined readout chip is being developed for the LHCb-experiment. Appropriate design measures have been taken to ensure the radiation hardness against total ionising dose effects in excess of 45 Mrad, as well as radiation effects induced by single particles. (C) 2003 Elsevier B.V. All rights reserved.
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Branching fraction measurements of B → ηcK decays

Physical Review D - Particles, Fields, Gravitation and Cosmology 70:1 (2004)

Authors:

B Aubert, R Barate, D Boutigny, F Couderc, JM Gaillard, A Hicheur, Y Karyotakis, JP Lees, V Tisserand, A Zghiche, A Palano, A Pompili, JC Chen, ND Qi, G Rong, P Wang, YS Zhu, G Eigen, I Ofte, B Stugu, GS Abrams, AW Borgland, AB Breon, DN Brown, J Button-Shafer, RN Cahn, E Charles, CT Day, MS Gill, AV Gritsan, Y Groysman, RG Jacobsen, RW Kadel, J Kadyk, LT Kerth, YG Kolomensky, G Kukartsev, C LeClerc, ME Levi, G Lynch, LM Mir, PJ Oddone, TJ Orimoto, M Pripstein, NA Roe, MT Ronan, VG Shelkov, AV Telnov, WA Wenzel, K Ford, TJ Harrison, CM Hawkes, SE Morgan, AT Watson, NK Watson, M Fritsch, K Goetzen, T Held, H Koch, B Lewandowski, M Pelizaeus, M Steinke, JT Boyd, N Chevalier, WN Cottingham, MP Kelly, TE Latham, FF Wilson, K Abe, T Cuhadar-Donszelmann, C Hearty, TS Mattison, JA McKenna, D Thiessen, P Kyberd, L Teodorescu, VE Blinov, AD Bukin, VP Druzhinin, VB Golubev, VN Ivanchenko, EA Kravchenko, AP Onuchin, SI Serednyakov, YI Skovpen, EP Solodov, AN Yushkov, D Best, M Bruinsma, M Chao, I Eschrich, D Kirkby, AJ Lankford, M Mandelkern, RK Mommsen, W Roethel, DP Stoker, C Buchanan, BL Hartfiel, JW Gary

Abstract:

We study the decays B+ → ηcK+ and B0 → ηcK0, where the ηc is reconstructed in the KS0K ±π∓ and K+K- π0 decay modes. Results are based on a sample of 86 B B̄ pairs collected with the BABAR detector at the SLAC e+e- B Factory. We measure the product of branching fractions B(B+ → ηcK+) ×B(ηc→KK̄π)= (7.40±0.50±0.70)×10-5 and B(B 0→ηcK0) ×B(ηc→KK̄π)=(6.48±0.85±0.71) ×10-5, where the first error is statistical and the second is systematic, In addition, we search for B → ηcK events with ηc→2(K+K-) and ηc→ φφ and determine the ηc decay branching fraction ratios B(ηc →(K+K-)) /B(ηc→KK̄π)=(2.3±0.7±0.6) ×10-2 and B(ηc→φφ) /B(ηc→KK̄π)=(5.5±1.4±0.5) ×10-2.
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Determination of the e+e- → γγ (γ) cross-section at LEP 2

European Physical Journal C 37:4 (2004) 405-419

Authors:

J Abdallah, P Abreu, W Adam, P Adzic, T Albrecht, T Alderweireld, R Alemany-Fernandez, T Allmendinger, P Allport, U Amaldi, N Amapane, S Amato, E Anashkin, A Andreazza, S Andringa, N Anjos, P Antilogus, WD Apel, Y Arnoud, S Ask, B Asman, E Augustin, A Augustinus, P Baillon, A Ballestrero, P Bambade, R Barbier, D Bardin, G Barker, A Baroncelli, M Battaglia, M Baubillier, KH Becks, M Begalli, A Behrmann, E Ben-Haim, N Benekos, A Benvenuti, C Berat, M Berggren, L Berntzon, D Bertrand, M Besancon, N Besson, D Bloch, M Blom, M Bluj, M Bonesini, M Boonekamp, L Booth, G Borisov, O Botner, B Bouquet, V Bowcock, I Boyko, M Bracko, R Brenner, E Brodet, P Bruckman, M Brunet, L Bugge, P Buschmann, M Calvi, T Camporesi, V Canale, F Carena, N Castro, F Cavallo, M Chapkin, P Charpentier, P Checchia, R Chierici, P Chliapnikov, J Chudoba, U Chung, K Cieslik, P Collins, R Contri, G Cosme, F Cossutti, J Costa, D Crennell, J Cuevas, J D'Hondt, J Dalmau, T Da Silva, W Da Silva, G Della Ricca, A De Angelis, W De Boer, C De Clercq, B De Lotto, N De Maria, A De Min, L De Paula, L Di Ciaccio, A Di Simone, K Doroba, J Drees, M Dris

Abstract:

A test of the benchmark QED process e+e- → γγ(γ) is reported, using the data collected with the DELPHI detector at LEP 2. The data analysed were recorded at centre-of-mass energies ranging from 161 GeV to 208 GeV and correspond to a total integrated luminosity of 656.4 pb-1. The Born cross-section for the process e +e- → γγ(γ) was determined, confirming the validity of QED at the highest energies ever attained in electron-positron collisions. Lower limits on the parameters of a number of possible deviations from QED, predicted within theoretical frameworks expressing physics beyond the Standard Model, were derived. © Springer-Verlag/ Società Italiana di Fisica 2004.
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Erratum: Search for supersymmetric particles assuming R-parity non-conservation in e+e- collisions at √s = 192 to 208 GeV (The European Physical Journal C (2004) 36 (1-23) DOI: 10.1140/epjc/s2004-01881-6)

European Physical Journal C 37:1 (2004) 129-131

Authors:

J Abdallah, P Abreu, W Adam, P Adzic, T Albrecht, T Alderweireld, R Alemany-Fernandez, T Allmendinger, P Allport, U Amaldi, N Amapane, S Amato, E Anashkin, A Andreazza, S Andringa, N Anjos, P Antilogus, WD Apel, Y Arnoud, S Ask, B Asman, E Augustin, A Augustinus, P Baillon, A Ballestrero, P Bambade, R Barbier, D Bardin, J Barker, A Baroncelli, M Battaglia, M Baubillier, KH Becks, M Begalli, A Behrmann, E Ben-Haim, N Benekos, A Benvenuti, C Berat, M Berggren, L Berntzon, D Bertrand, M Besancon, N Besson, D Bloch, M Blom, M Bluj, M Bonesini, M Boonekamp, L Booth, G Borisov, O Botner, B Bouquet, V Bowcock, I Boyko, M Bracko, R Brenner, E Brodet, P Bruckman, M Brunet, L Bugge, P Buschmann, M Calvi, T Camporesi, V Canale, F Carena, N Castro, F Cavallo, M Chapkin, P Charpentier, P Checchia, R Chierici, P Chliapnikov, J Chudoba, U Chung, K Cieslik, P Collins, R Contri, G Cosme, F Cossutti, J Costa, D Crennell, J Cuevas, J D'Hondt, J Dalmau, T da Silva, W da Silva, G della Ricca, A de Angelis, W de Boer, C de Clercq, B de Lotto, N de Maria, A de Min, L de Paula, L di Ciaccio, A di Simone, K Doroba, J Drees, M Dris
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Erratum: b-tagging in DELPHI at LEP (European Physical Journal C (2004) 32 (185-208) DOI 10.1140/epjc/s2003-01441-8)

European Physical Journal C 32:2 (2004) 299-301

Authors:

J Abdallah, P Abreu, W Adam, T Adye, P Adzic, T Albrecht, T Alderweireld, R Alemany-Fernandez, T Allmendinger, PP Allport, S Almehed, U Amaldi, N Amapane, S Amato, E Anashkin, A Andreazza, S Andringa, N Anjos, P Antilogus, WD Apel, Y Arnoud, S Ask, B Asman, JE Augustin, A Augustinus, P Baillon, A Ballestrero, P Bambade, R Barbier, D Bardin, G Barker, A Baroncelli, M Bates, M Battaglia, M Baubillier, KH Becks, M Begalli, A Behrmann, N Benekos, A Benvenuti, C Berat, M Berggren, L Berntzon, D Bertrand, M Besancon, N Besson, J Bibby, P Biffi, D Bloch, M Blom, M Bonesini, M Boonekamp, PSL Booth, G Borisov, O Botner, B Bouquet, TJV Bowcock, I Boyko, M Bracko, P Branchini, R Brenner, E Brodet, P Bruckman, JM Brunet, L Bugge, P Buschmann, M Caccia, M Calvi, T Camporesi, V Canale, F Carena, N Castro, F Cavallo, V Chabaud, M Chapkin, P Charpentier, P Checchia, R Chierici, P Chliapnikov, J Chudoba, SU Chung, K Cieslik, P Collins, R Contri, G Cosme, F Cossutti, MJ Costa, F Couchot, B Crawley, D Crennell, J Cuevas, B D'Almagne, J D'Hondt, J Dalmau, T da Silva, W Da Silva, G Della Ricca, A de Angelis, W de Boer, C de Clercq
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