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Search for η(1475)→KS0K ±π∓ in two-photon fusion at the CLEO detector at Cornell

Physical Review D Particles Fields Gravitation and Cosmology 71:7 (2005) 1-12

Authors:

R Ahohe, DM Asner, 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, EI Shibata, IPJ Shipsey, GS Adams, M Chasse, M Cravey, JP Cummings, I Danko, J Napolitano, H Muramatsu, CS Park, W Park, JB Thayer, EH Thorndike, TE Coan, YS Gao, F Liu, R Stroynowski, M Artuso, C Boulahouache, S Blusk, J Butt, E Dambasuren, O Dorjkhaidav, J Li, N Menaa, R Mountain, R Nandakumar, R Redjimi, R Sia, T Skwarnicki, S Stone, JC Wang, K Zhang, SE Csorna, G Bonvicini, D Cinabro, M Dubrovin, A Bornheim, SP Pappas, AJ Weinstein, RA Briere, GP Chen, T Ferguson, G Tatishvili, H Vogel, ME Watkins, JL Rosner, NE Adam, JP Alexander, K Berkelman, DG Cassel, V Crede, JE Duboscq, KM Ecklund, R Ehrlich, L Fields, RS Galik, L Gibbons, B Gittelman, R Gray, SW Gray, DL Hartill, BK Heltsley, D Hertz, L Hsu, CD Jones, J Kandaswamy, DL Kreinick, VE Kuznetsov, H Mahlke-Krüger, TO Meyer, PUE Onyisi, JR Patterson, D Peterson, J Pivarski, D Riley, A Ryd, AJ Sadoff, H Schwarthoff, MR Shepherd, S Stroiney, WM Sun, JG Thayer, D Urner, T Wilksen

Abstract:

We analyze 13.8 fb1 of the integrated e+e- luminosity collected at 10.6 GeV center-of-mass energy with the CLEO II and CLEO II.V detectors to study exclusive two-photon production of hadrons with masses below 1.7 GeV/c2 decaying into the Ks0 K± π∓ final state. We observe two statistically significant enhancements in the ν(1475) mass region. These enhancements have large transverse momentum which rules them out as being due to pseudoscalar resonances but is consistent with the production of axial-vector mesons. We use tagged two-photon events to study the properties of the observed enhancements and associate them with the production of f1(1285) and f1(1420). Our nonobservation of ν(1475) is inconsistent by more than 2 standard deviations with the first observation of this resonance in two-photon collisions by the L3 experiment. We present our estimates for 90% confidence level upper limits on the products of two-photon partial widths of light pseudoscalar hadrons and their branching fractions into Ks 0(π+π-)K±π ∓. © 2005 The American Physical Society.

Radiation-hard semiconductor detectors for SuperLHC

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment Elsevier 541:1-2 (2005) 189-201

Authors:

M Bruzzi, J Adey, A Al-Ajili, P Alexandrov, G Alfieri, PP Allport, A Andreazza, M Artuso, S Assouak, BS Avset, L Barabash, E Baranova, A Barcz, A Basile, R Bates, N Belova, SF Biagi, GM Bilei, D Bisello, A Blue, A Blumenau, V Boisvert, G Bolla, G Bondarenko, E Borchi, L Borrello, D Bortoletto, M Boscardin, L Bosisio, TJV Bowcock, TJ Brodbeck, J Broz, A Brukhanov, A Brzozowski, M Buda, P Buhmann, C Buttar, F Campabadal, D Campbell, A Candelori, G Casse, A Cavallini, A Chilingarov, D Chren, V Cindro, M Citterio, P Collins, R Coluccia, D Contarato, J Coutinho, D Creanza, W Cunningham, V Cvetkov, G-F Dalla Betta, G Davies, I Dawson, W de Boer, M De Palma, R Demina, P Dervan, A Dierlamm, S Dittongo, L Dobrzanski, Z Dolezal, A Dolgolenko, T Eberlein, V Eremin, C Fall, F Fasolo, T Ferbel, F Fizzotti, C Fleta, E Focardi, E Forton, S Franchenko, E Fretwurst, F Gamaz, C Garcia, JE Garcia-Navarro, E Gaubas, M-H Genest, KA Gill, K Giolo, M Glaser, C Goessling, V Golovine, S González Sevilla, I Gorelov, J Goss, A Gouldwell, G Grégoire, P Gregori, E Grigoriev, C Grigson, A Grillo, A Groza, J Guskov, L Haddad, J Härkönen, R Harding, F Hauler, S Hayama, M Hoeferkamp, F Hönniger, T Horazdovsky, R Horisberger, M Horn, A Houdayer, B Hourahine, A Hruban, G Hughes, I Ilyashenko, K Irmscher, A Ivanov, K Jarasiunas, T Jin, BK Jones, R Jones, C Joram, L Jungermann, E Kalinina, P Kaminski, A Karpenko, A Karpov, V Kazlauskiene, V Kazukauskas, V Khivrich, V Khomenkov, J Kierstead, J Klaiber-Lodewigs, M Kleverman, R Klingenberg, P Kodys, Z Kohout, S Korjenevski, A Kowalik, R Kozlowski, M Kozodaev, G Kramberger, O Krasel, A Kuznetsov, S Kwan, S Lagomarsino, T Lari, K Lassila-Perini, V Lastovetsky, G Latino, S Latushkin, S Lazanu, I Lazanu, C Lebel, K Leinonen, C Leroy, Z Li, G Lindström, L Lindstrom, V Linhart, A Litovchenko, P Litovchenko, V Litvinov, A Lo Giudice, M Lozano, Z Luczynski, P Luukka, A Macchiolo, A Mainwood, LF Makarenko, I Mandić, C Manfredotti, S Marti I Garcia, S Marunko, K Mathieson, A Mozzanti, J Melone, D Menichelli, C Meroni, A Messineo, S Miglio, M Mikuž, J Miyamoto, M Moll, E Monakhov, F Moscatelli, L Murin, F Nava, D Naoumov, E Nossarzewska-Orlowska, S Nummela, J Nysten, P Olivero, V Oshea, T Palviainen, C Paolini, C Parkes, D Passeri, U Pein, G Pellegrini, L Perera, M Petasecca, B Piatkowski, C Piemonte, GU Pignatel, N Pinho, I Pintilie, L Pintilie, L Polivtsev, P Polozov, AI Popa, J Popule, S Pospisil, G Pucker, V Radicci, JM Rafí, F Ragusa, M Rahman, R Rando, R Roeder, T Rohe, S Ronchin, C Rott, P Roy, A Roy, A Ruzin, A Ryazanov, HFW Sadrozinski, S Sakalauskas, M Scaringella, L Schiavulli, S Schnetzer, B Schumm, S Sciortino, A Scorzoni, G Segneri, S Seidel, A Seiden, G Sellberg, P Sellin, D Sentenac, I Shipsey, P Sicho, T Sloan, M Solar, S Son, B Sopko, N Spencer, J Stahl, I Stavitski, D Stolze, R Stone, J Storasta, N Strokan, W Strupinski, M Sudzius, B Surma, J Suuronen, A Suvorov, BG Svensson, P Tipton, M Tomasek, C Troncon, A Tsvetkov, E Tuominen, E Tuovinen, T Tuuva, M Tylchin, H Uebersee, J Uher, M Ullán, JV Vaitkus, P Vanni, J Velthuis, G Verzellesi, E Verbitskaya, V Vrba, G Wagner, I Wilhelm, S Worm, V Wright, R Wunstorf, P Zabierowski, A Zaluzhny, M Zavrtanik, M Zen, V Zhukov, N Zorzi

Pseudo-Goldstones from Supersymmetric Wilson Lines on 5D Orbifolds

ArXiv hep-ph/0503255 (2005)

Authors:

Thomas Flacke, Babiker Hassanain, John March-Russell

Abstract:

We consider a U(1) gauge theory on the five dimensional orbifold $\mathcal{M}_4\times S^1/Z_2$, where $A_5$ has even $Z_2$ parity. This leads to a light pseudoscalar degree of freedom $W(x)$ in the effective 4D theory below the compactification scale arising from a gauge-invariant brane-to-brane Wilson line. As noted by Arkani-Hamed et al in the non-supersymmetric $S^1$ case the 5D bulk gauge-invariance of the underlying theory together with the non-local nature of the Wilson line field leads to the protection of the 4D theory of $W(x)$ from possible large global-symmetry violating quantum gravitational effects. We study the $S^1/Z_2$ theory in detail, in particular developing the supersymmetric generalization of this construction, involving a pseudoscalar Goldstone field (the `axion') and its scalar and fermion superpartners (`saxion' and `axino'). The global nature of $W(x)$ implies the absence of independent Kaluza-Klein excitations of its component fields. The non-derivative interactions of the (supersymmetric) Wilson line in the effective 4D theory arising from U(1) charged 5D fields $Φ$ propagating between the boundary branes are studied. We show that, similar to the non-supersymmetric $S^1$ case, these interactions are suppressed by $\exp(-πR m_Φ)$ where $πR$ is the size of the extra dimension.

Pseudo-Goldstones from Supersymmetric Wilson Lines on 5D Orbifolds

(2005)

Authors:

Thomas Flacke, Babiker Hassanain, John March-Russell

Search for Higgs Bosons Decaying into b anti-b and Produced in Association with a Vector Boson in Proton-Antiproton Collisions at 1.8 TeV

ArXiv hep-ex/0503039 (2005)