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Search for pentaquarks decaying to Ξπ in deep inelastic scattering at HERA

Physics Letters B Elsevier 610:3-4 (2005) 212-224

Authors:

ZEUS Collaboration, S Chekanov, M Derrick, S Magill, S Miglioranzi, B Musgrave, J Repond, R Yoshida, MCK Mattingly, N Pavel, AG Yagües Molina, P Antonioli, G Bari, M Basile, L Bellagamba, D Boscherini, A Bruni, G Bruni, G Cara Romeo, L Cifarelli, F Cindolo, A Contin, M Corradi, S De Pasquale, P Giusti, G Iacobucci, A Margotti, A Montanari, R Nania, F Palmonari, A Pesci, A Polini, L Rinaldi, G Sartorelli, A Zichichi, G Aghuzumtsyan, D Bartsch, I Brock, S Goers, H Hartmann, E Hilger, P Irrgang, H-P Jakob, O Kind, U Meyer, E Paul, J Rautenberg, R Renner, KC Voss, M Wang, M Wlasenko, DS Bailey, NH Brook, JE Cole, GP Heath, T Namsoo, S Robins, M Capua, A Mastroberardino, M Schioppa, G Susinno, E Tassi, JY Kim, KJ Ma, M Helbich, Y Ning, Z Ren, WB Schmidke, F Sciulli, J Chwastowski, A Eskreys, J Figiel, A Galas, K Olkiewicz, P Stopa, D Szuba, L Zawiejski, L Adamczyk, T Bołd, I Grabowska-Bołd, D Kisielewska, AM Kowal, J Łukasik, M Przybycień, L Suszycki, J Szuba, A Kotański, W Słomiński, V Adler, U Behrens, I Bloch, K Borras, G Drews, J Fourletova, A Geiser, D Gladkov, P Göttlicher, O Gutsche, T Haas, W Hain, C Horn, B Kahle, U Kötz, H Kowalski, G Kramberger, D Lelas, H Lim, B Löhr, R Mankel, I-A Melzer-Pellmann, CN Nguyen, D Notz, AE Nuncio-Quiroz, A Raval, R Santamarta, U Schneekloth, U Stösslein, G Wolf, C Youngman, W Zeuner, S Schlenstedt, G Barbagli, E Gallo, C Genta, PG Pelfer, A Bamberger, A Benen, F Karstens, D Dobur, NN Vlasov, PJ Bussey, AT Doyle, J Ferrando, J Hamilton, S Hanlon, DH Saxon, IO Skillicorn, I Gialas, T Carli, T Gosau, U Holm, N Krumnack, E Lohrmann, M Milite, H Salehi, P Schleper, T Schörner-Sadenius, S Stonjek, K Wichmann, K Wick, A Ziegler, Ar Ziegler, C Collins-Tooth, C Foudas, C Fry, R Gonçalo, KR Long, AD Tapper, M Kataoka, K Nagano, K Tokushuku, S Yamada, Y Yamazaki, AN Barakbaev, EG Boos, NS Pokrovskiy, BO Zhautykov, D Son, J de Favereau, K Piotrzkowski, F Barreiro, C Glasman, O González, M Jimenez, L Labarga, J del Peso, J Terrón, M Zambrana, M Barbi, F Corriveau, C Liu, S Padhi, M Plamondon, DG Stairs, R Walsh, C Zhou, T Tsurugai, A Antonov, P Danilov, BA Dolgoshein, V Sosnovtsev, A Stifutkin, S Suchkov, RK Dementiev, PF Ermolov, LK Gladilin, II Katkov, LA Khein, IA Korzhavina, VA Kuzmin, BB Levchenko, O Yu Lukina, AS Proskuryakov, LM Shcheglova, DS Zotkin, SA Zotkin, I Abt, C Büttner, A Caldwell, X Liu, J Sutiak, N Coppola, G Grigorescu, S Grijpink, A Keramidas, E Koffeman, P Kooijman, E Maddox, A Pellegrino, S Schagen, H Tiecke, M Vázquez, L Wiggers, E de Wolf, N Brümmer, B Bylsma, LS Durkin, TY Ling, PD Allfrey, MA Bell, AM Cooper-Sarkar, A Cottrell, RCE Devenish, B Foster, G Grzelak, C Gwenlan, T Kohno, S Patel, PB Straub, R Walczak, P Bellan, A Bertolin, R Brugnera, R Carlin, R Ciesielski, F Dal Corso, S Dusini, A Garfagnini, S Limentani, A Longhin, L Stanco, M Turcato, EA Heaphy, F Metlica, BY Oh, JJ Whitmore, Y Iga, G D'Agostini, G Marini, A Nigro, JC Hart, H Abramowicz, A Gabareen, S Kananov, A Kreisel, A Levy, M Kuze, S Kagawa, T Tawara, R Hamatsu, H Kaji, S Kitamura, K Matsuzawa, O Ota, YD Ri, M Costa, MI Ferrero, V Monaco, R Sacchi, A Solano, M Arneodo, M Ruspa, S Fourletov, T Koop, JF Martin, A Mirea, JM Butterworth, R Hall-Wilton, TW Jones, JH Loizides, MR Sutton, C Targett-Adams, M Wing, J Ciborowski, P Kulinski, P Łużniak, J Malka, RJ Nowak, JM Pawlak, J Sztuk, T Tymieniecka, A Tyszkiewicz, A Ukleja, J Ukleja, AF Żarnecki, M Adamus, P Plucinski, Y Eisenberg, D Hochman, U Karshon, MS Lightwood, A Everett, D Kçira, S Lammers, L Li, DD Reeder, M Rosin, P Ryan, AA Savin, WH Smith, S Dhawan, S Bhadra, CD Catterall, Y Cui, G Hartner, S Menary, U Noor, M Soares, J Standage, J Whyte
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Pseudoresonant laser wakefield acceleration driven by 10.6-μm laser light

IEEE Transactions on Plasma Science 33:1 I (2005) 3-7

Authors:

WD Kimura, NE Andreev, M Babzien, I Ben-Zvi, DB Cline, CE Dilley, SC Gottschalk, SM Hooker, KP Kusche, SV Kuznetsov, IV Pavlishin, IV Pogorelsky, AA Pogosova, LC Steinhauer, A Ting, V Yakimenko, A Zigler, F Zhou

Abstract:

This paper describes an experiment to demonstrate, for the first time, laser wakefield acceleration (LWFA), driven by 10.6-μm light from a CO2 laser. This experiment is also noteworthy because it will operate in a pseudoresonant LWFA regime, in which the laser-pulse-length is too long for resonant LWFA, but too short for self-modulated LWFA. Nonetheless, high acceleration gradients are still possible. This experiment builds upon an earlier experiment called staged electron laser acceleration (STELLA), where efficient trapping and monoenergetic laser acceleration of electrons were demonstrated using inverse free electron lasers. The aim is to apply the STELLA approach of laser-driven microbunch formation followed by laser-driven trapping and acceleration to LWFA. These capabilities are important for a practical electron linear accelerator based upon LWFA. © 2005 IEEE.
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A measurement of the τ lifetime

The European Physical Journal C 39:3 (2005) 331-337

Authors:

W Braunschweig, R Gerhards, FJ Kirschfink, HU Martyn, B Bock, HM Fischer, H Hartmann, J Hartmann, E Hilger, A Jocksch, R Wedemeyer, B Foster, AJ Martin, AJ Sephton, E Bernardi, J Chwastowski, A Eskreys, K Gather, K Genser, H Hultschig, P Joos, H Kowalski, A Ladage, B Löhr, D Lüke, P Mättig, D Notz, JM Pawlak, KU Pösnecker, E Ros, W Schütte, D Trines, R Walczak, G Wolf, H Kolanoski, T Kracht, J Krüger, E Lohrmann, G Poelz, W Zeuner, DM Binnie, J Hassard, J Shulman, D Su, F Barreiro, A Leites, J del Peso, C Balkwill, MG Bowler, PN Burrows, RJ Cashmore, GP Heath, DJ Mellor, P Ratoff, I Silvester, I Tomalin, E Veitch, GE Forden, JC Hart, DH Saxon, S Brandt, M Holder, L Labarga, Y Eisenberg, U Karshon, G Mikenberg, A Montag, D Revel, E Ronat, A Shapira, N Wainer, G Yekutieli, A Caldwell, D Muller, S Ritz, D Strom, M Takashima, E Wicklund, SL Wu, G Zobernig

Abstract:

We have reconstructed 695 three-track τ decay vertices using a high resolution drift chamber close to the interaction point. From the distribution of decay lengths we measure the lifetime to be (3.06 ±0.20±0.14)×10-13 s. Using this result we find that the ratio of charged weak coupling constant for the τ to that of the μ, G τ/G μ=0.967±0.040 consistent with the concept of lepton universality. © 1988 Springer-Verlag.
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Detector concepts

LCWS 2005 - 2005 International Linear Collider Workshop (2005)

Authors:

G Aarons, T Abe, J Abernathy, M Ablikim, H Abramowicz, D Adey, C Adloff, C Adolphsen, K Afanaciev, I Agapov, JK Ahn, H Aihara, M Akemoto, M Del CarmenAlabau, J Albert, H Albrecht, M Albrecht, D Alesini, G Alexander, J Alexander, W Allison, J Amann, R Amirikas, Q An, S Anami, B Ananthanarayan, T Anderson, L Andricek, M Anduze, M Anerella, N Anfimov, D Angal-Kalinin, S Antipov, C Antoine, M Aoki, A Aoza, S Aplin, R Appleby, Y Arai, S Araki, T Arkan, N Arnold, R Arnold, R Arnowitt, X Artru, K Arya, A Aryshev, E Asakawa, F Asiri, D Asner, M Atac, G Atoian, D Attié, JE Augustin, DB Augustine, B Ayres, T Aziz, D Baars, F Badaud, N Baddams, J Bagger, S Bai, D Bailey, IR Bailey, D Baker, NI Balalykin, JP Balbuena, JL Baldy, M Ball, M Ball, A Ballestrero, J Ballin, C Baltay, P Bambade, S Ban, H Band, K Bane, B Banerjee, S Barbanotti, D Barbareschi, A Barbaro-Galtieri, DP Barber, M Barbi, DY Bardin, B Barish, TL Barklow, R Barlow, VE Barnes, M Barone, C Bartels, V Bartsch, R Basu, M Battaglia, Y Batygin, J Baudot, U Baur, DE Baynham, C Beard, C Bebek, P Bechtle

Dramatic enhancement of xuv laser output using a multimode gas-filled capillary waveguide

Physical Review A - Atomic, Molecular, and Optical Physics 71:1 (2005)

Authors:

T Mocek, CM McKenna, B Cros, S Sebban, DJ Spence, G Maynard, I Bettaibi, V Vorontsov, AJ Gonsavles, SM Hooker

Abstract:

We report a significant increase of the output of a 41.8-nm Xe 8+ laser achieved by means of multimode guiding of high-intensity femtosecond laser pulses in a gas-filled dielectric capillary tube. The optimized lasing signal from a 15-mm-long capillary was nearly an order of magnitude higher than that from a gas cell of the same length. Simulations of the propagation of the pump laser pulse in the capillary confirmed that this enhancement is due to reflections from the capillary wall, which increase the length of the Xe 8+ plasma column generated. The influence of gas pressure and focusing position on the lasing is also presented. © 2005 The American Physical Society.
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