AION/Magis

Research group

Research theme

Sub department

About

Experimental observation of the tilting mode of an array of vortices in a dilute Bose-Einstein Condensate

Physical Review Letters 93 (2004) 080406 4pp

Authors:

CJ Foot, N. L. Smith, W. H. Heathcote, J. M. Krueger

Search for Bs0 → μ+μ - and Bd0 → μ+μ - decays in pp̄ collisions at √s = 1.96 TeV

Physical Review Letters 93:3 (2004)

Authors:

D Acousta, T Affolder, T Akimoto, MG Albrow, D Ambrose, S Amerio, D Amidei, A Anastassov, K Anikeev, A Annovi, J Antos, M Aoki, G Apollinari, T Arisawa, JF Arguin, A Artikov, W Ashmanskas, A Attal, F Azfar, P Azzi-Bacchetta, N Bacchetta, H Bachacou, W Badgett, A Barbaro-Galtieri, GJ Barker, VE Barnes, BA Barnett, S Baroiant, M Barone, G Bauer, F Bedeschi, S Behari, S Belforte, G Bellettini, J Bellinger, D Benjamin, A Beretvas, A Bhatti, M Binkley, D Bisello, M Bishai, RE Blair, C Blocker, K Bloom, B Blumenfeld, A Bocci, A Bodek, G Bolla, A Bolshov, PSL Booth, D Bortoletto, J Boudreau, S Bourov, C Bromberg, E Brubaker, J Budagov, HS Budd, K Burkett, G Busetto, P Bussey, KL Byrum, S Cabrera, P Calafiura, M Campanelli, M Campbell, A Canepa, M Casarsa, D Carlsmith, S Carron, R Carosi, A Castro, P Catastini, D Cauz, A Cerri, C Cerri, L Cerrito, J Chapman, C Chen, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, I Cho, K Cho, D Chokheli, ML Chu, S Chuang, JY Chung, WH Chung, YS Chung, CI Ciobanu, MA Ciocci, AG Clark, D Clark, M Coca, A Connolly, M Convery, J Conway, M Cordelli

Abstract:

The decay mechanisms of Bs0 → μ +μ- and Bd0 → μ +μ- in pp̄ collisions were investigated. For discrimination of the decays from background events, four variables were used such as invariant mass of muon pair, B-candidate proper decay length, opening angle between B-hadron flight direction and B-candidate track isolation. A 'blind' analysis technique was also used for determination of optimal selection criteria for four variables. The results show that optimal set of selection criteria uses ∓80 MeV/c2 search window around B s0 mass, and I > 0.65.

Review of particle physics

592:1-4 (2004) 1-5

Authors:

S Eidelman, KG Hayes, KA Olive, M Aguilar-Benitez, C Amsler, D Asner, KS Babu, RM Barnett, J Beringer, PR Burchat, CD Carone, C Caso, G Conforto, O Dahl, G D'Ambrosio, M Doser, JL Feng, T Gherghetta, L Gibbons, M Goodman, C Grab, DE Groom, A Gurtu, K Hagiwara, JJ Hernández-Rey, K Hikasa, K Honscheid, H Jawahery, C Kolda, Y Kwon, ML Mangano, AV Manohar, J March-Russell, A Masoni, R Miquel, K Mönig, H Murayama, K Nakamura, S Navas, L Pape, C Patrignani, A Piepke, G Raffelt, M Roos, M Tanabashi, J Terning, NA Törnqvist, TG Trippe, P Vogel, CG Wohl, RL Workman, WM Yao, PA Zyla, B Armstrong, PS Gee, G Harper, KS Lugovsky, SB Lugovsky, VS Lugovsky, A Rom, M Artuso, E Barberio, M Battaglia, H Bichsel, O Biebel, P Bloch, RN Cahn, D Casper, A Cattai, RS Chivukula, G Cowan, T Damour, K Desler, MA Dobbs, M Drees, A Edwards, DA Edwards, VD Elvira, J Erler, VV Ezhela, W Fetscher, BD Fields, B Foster, D Froidevaux, M Fukugita, TK Gaisser, L Garren, HJ Gerber, G Gerbier, FJ Gilman, HE Haber, C Hagmann, J Hewett, I Hinchliffe, CJ Hogan, G Höhler, P Igo-Kemenes, JD Jackson, KF Johnson, D Karlen

Abstract:

This biennial Review summarizes much of Particle Physics. Using data from previous editions, plus 1726 new measurements from 512 papers, we list, evaluate, and average measured properties of gauge bosons, leptons, quarks, mesons, and baryons. We also summarize searches for hypothetical particles such as Higgs bosons, heavy neutrinos, and supersymmetric particles. All the particle properties and search limits are listed in Summary Tables. We also give numerous tables, figures, formulae, and reviews of topics such as the Standard Model, particle detectors, probability, and statistics. Among the 119 reviews are many that are new or heavily revised including those on neutrino mixing, CP violation in K, D, and B mesons, Vcb, the new exotic Θ(1540) particle, extra-dimensions, grand unified theories, cosmic background radiation, dark matter, cosmological parameters, and big bang cosmology. A booklet is available containing the Summary Tables and abbreviated versions ofsome of the other sections of this full Review. All tables, listings, and reviews (and errata) are also available on the Particle Data Group website: http//pdg.lbl.gov. ©2004 Regents of the University of California.

TeV scale resonant leptogenesis from supersymmetry breaking

Journal of High Energy Physics 8:7 (2004)

Authors:

T Hambye, J March-Russell, SM West

Abstract:

We propose a model of TeV-scale resonant leptogenesis based upon recent models of the generation of light neutrino masses from supersymmetry-breaking effects with TeV-scale right-handed (rhd) neutrinos, Ni The model leads to large cosmological lepton asymmetries via the resonant behaviour of the one-loop self-energy contribution to Ni decay. Our model addresses the primary problems of previous phenomenological studies of low-energy leptogenesis: a rational for TeV-scale rhd neutrinos with small Yukawa couplings so that the out-of equilibrium condition for Ni decay is satisfied; the origin of the tiny, but non-zero mass splitting required between at least two Ni masses; and the necessary non-trivial breaking of flavour symmetries in the rhd neutrino sector. The low mass-scale of the rhd neutrinos and their superpartners, and the TeV-scale A-terms automatically contained within the model offer opportunities for partial direct experimental tests of this leptogenesis mechanism at future colliders. © SISSA/ISAS 2004.

Gauge & Higgs boson summary table

Physics Letters B Elsevier 592:1-4 (2004) 31-88

Authors:

Particle Data Group, S Eidelman, KG Hayes, KA Olive, M Aguilar-Benitez, C Amsler, D Asner, KS Babu, RM Barnett, J Beringer, PR Burchat, CD Carone, C Caso, G Conforto, O Dahl, G D'Ambrosio, M Doser, JL Feng, T Gherghetta, L Gibbons, M Goodman, C Grab, DE Groom, A Gurtu, K Hagiwara, JJ Hernández-Rey, K Hikasa, K Honscheid, H Jawahery, C Kolda, Y Kwon, ML Mangano, AV Manohar, J March-Russell, A Masoni, R Miquel, K Mönig, H Murayama, K Nakamura, S Navas, L Pape, C Patrignani, A Piepke, G Raffelt, M Roos, M Tanabashi, J Terning, NA Törnqvist, TG Trippe, P Vogel, CG Wohl, RL Workman, W-M Yao, PA Zyla, B Armstrong, PS Gee, G Harper, KS Lugovsky, SB Lugovsky, VS Lugovsky, A Rom, M Artuso, E Barberio, M Battaglia, H Bichsel, O Biebel, P Bloch, RN Cahn, D Casper, A Cattai, RS Chivukula, G Cowan, T Damour, K Desler, MA Dobbs, M Drees, A Edwards, DA Edwards, VD Elvira, J Erler, VV Ezhela, W Fetscher, BD Fields, B Foster, D Froidevaux, M Fukugita, TK Gaisser, L Garren, H-J Gerber, G Gerbier, FJ Gilman, HE Haber, C Hagmann, J Hewett, I Hinchliffe, CJ Hogan, G Höhler, P Igo-Kemenes, JD Jackson, KF Johnson, D Karlen, B Kayser, D Kirkby, SR Klein, K Kleinknecht, IG Knowles, P Kreitz, Yu V Kuyanov, O Lahav, P Langacker, A Liddle, L Littenberg, DM Manley, AD Martin, M Narain, P Nason, Y Nir, JA Peacock, HR Quinn, S Raby, BN Ratcliff, EA Razuvaev, B Renk, G Rolandi, MT Ronan, LJ Rosenberg, CT Sachrajda, Y Sakai, AI Sanda, S Sarkar, M Schmitt, O Schneider, D Scott, WG Seligman, MH Shaevitz, T Sjöstrand, GF Smoot, S Spanier, H Spieler, NJC Spooner, M Srednicki, A Stahl, T Stanev, M Suzuki, NP Tkachenko, GH Trilling, G Valencia, K van Bibber, MG Vincter, DR Ward, BR Webber, M Whalley, L Wolfenstein, J Womersley, CL Woody, OV Zenin, R-Y Zhu