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Search for two-photon production of resonances decaying into K {Mathematical expression} and K {Mathematical expression}π

Zeitschrift Fur Physik C Particles and Fields 29:2 (1985) 189-196

Authors:

M Althoff, W Braunschweig, FJ Kirschfink, HU Martyn, R Rosskamp, H Siebke, W Wallraff, J Eisenmann, HM Fischer, H Hartmann, A Jocksch, G Knop, H Kolanoski, H Kück, V Mertens, R Wedemeyer, B Foster, A Wood, E Bernardi, Y Eisenberg, A Eskreys, K Gather, H Hultschig, P Joos, B Klima, H Kowalski, A Ladage, B Löhr, D Lüke, P Mättig, G Mikenberg, D Notz, D Revel, D Trines, T Tymieniecka, R Walczak, G Wolf, W Zeuner, E Hilger, T Kracht, HL Krasemann, E Lohrmann, G Poelz, KU Pösnecker, DM Binnie, PJ Dornan, DA Garbutt, C Jenkins, WG Jones, JK Sedgbeer, D Su, J Thomas, WAT Wan Abdullah, F Barreiro, L Labarga, E Ros, MG Bowler, P Bull, RJ Cashmore, P Dauncey, R Devenish, CM Hawkes, G Heath, DJ Mellor, SL Lloyd, KW Bell, GE Forden, JC Hart, DK Hasell, DH Saxon, S Brandt, M Dittmar, M Holder, G Kreutz, B Neumann, E Duchovni, U Karshon, A Montag, R Mir, E Ronat, G Yekutieli, A Shapira, G Baranko, A Caldwell, M Cherney, M Hildebrandt, JM Izen, M Mermikides, S Ritz, D Strom, M Takashima, H Venkataramania, E Wicklund, SL Wu, G Zobernig

Abstract:

An analysis of the production of KS0KS0 and K±Ks0π∓ by two quasi-real photons is presented. The cross section for γγ→K0 {Mathematical expression}, which is given for the γγ invariant mass range from K {Mathematical expression} threshold to 2.5 GeV, is dominated by the f′(1525) resonance and an enhancement near the K {Mathematical expression} threshold. Upper limits on the product of the two-photon width times the branching ratio into K {Mathematical expression} pairs are given for Θ(1700), h(2030), and ξ(2220). For exclusive two-photon production of K±Ks0π∓ no significant signal was observed. Upper limits are given on the cross section of γγ→K+ {Mathematical expression}π- or K-K0π+ between 1.4 and 3.2 GeV and on the product of the γγ width times the branching ratio into the K {Mathematical expression}π final states for the ηc(2980) and the ι(1440), yielding Γ(γγ)→i(1440))·BR(i(1440)→K {Mathematical expression}π<2.2 keV at 95% C.L. © 1985 Springer-Verlag.
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SEARCH FOR 2-PHOTON PRODUCTION OF RESONANCES DECAYING INTO KKBAR AND KKBAR-PI

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS 29:2 (1985) 189-196

Authors:

M ALTHOFF, W BRAUNSCHWEIG, FJ KIRSCHFINK, HU MARTYN, R ROSSKAMP, H SIEBKE, W WALLRAFF, J EISENMANN, HM FISCHER, H HARTMANN, A JOCKSCH, G KNOP, H KOLANOSKI, H KUCK, V MERTENS, R WEDEMEYER, B FOSTER, A WOOD, E BERNARDI, Y EISENBERG, A ESKREYS, K GATHER, H HULTSCHIG, P JOOS, B KLIMA, H KOWALSKI, A LADAGE, B LOHR, D LUKE, P MATTIG, G MIKENBERG, D NOTZ, D REVEL, D TRINES, T TYMIENIECKA, R WALCZAK, G WOLF, W ZEUNER, E HILGER, T KRACHT, HL KRASEMANN, E LOHRMANN, G POELZ, KU POSNECKER, DM BINNIE, PJ DORNAN, DA GARBUTT, C JENKINS, WG JONES, JK SEDGBEER, D SU, J THOMAS, WATW ABDULLAH, F BARREIRO, L LABARGA, E ROS, MG BOWLER, P BULL, RJ CASHMORE, P DAUNCEY, R DEVENISH, CM HAWKES, G HEATH, DJ MELLOR, SL LLOYD, KW BELL, GE FORDEN, JC HART, DK HASELL, DH SAXON, S BRANDT, M DITTMAR, M HOLDER, G KREUTZ, B NEUMANN, E DUCHOVNI, U KARSHON, A MONTAG, R MIR, E RONAT, G YEKUTIELI, A SHAPIRA, G BARANKO, A CALDWELL, M CHERNEY, M HILDEBRANDT, JM IZEN, M MERMIKIDES, S RITZ, D STROM, M TAKASHIMA, H VENKATARAMANIA, E WICKLUND, SL WU, G ZOBERNIG
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Study of theA-dependence of inclusivep,,Λ and production in π±-Nucleus interactions at 30 GeV/c

Zeitschrift für Physik C Particles and Fields Springer Nature 25:2 (1984) 115-120

Authors:

MG Abreu, T Armstrong, M Baubillier, W Beusch, A Burns, N Erschaidat, J Gago, A Jacholkowski, K Knudson, S Otwinowski, D Perrin, A Palano, M Pimenta, E Quercigh, Z Strachman, M Szeptycka, S Tkaczyk, R Walczak, R Zitoun
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Search for narrow baryonium states near the NN threshold

Nuclear Physics B Elsevier 209:2 (1982) 269-283

Authors:

R Bertini, P Birien, K Braune, G Bruge, W Brückner, H Döbbeling, RW Frey, D Garreta, TJ Ketel, K Kilian, B Mayer, B Pietrzyk, B Povh, M Uhrmacher, Th Walcher, R Walczak, Heidelberg-Saclay Collaboration
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A high power fibre laser for electron beam emittance measurements

Proceedings of IPAC 10 3227-3229

Authors:

L Corner, LJ Nevay, R Walczak

Abstract:

We present the latest results on the development of a high power fibre laser system for a laser-wire measuring electron beam emittance in an ILC-specification environment. The laser consists of a commercial Ytterbium (Yb) doped fibre laser system producing 1μJ pulses at 6.49MHz, which can be locked to an external frequency reference. This output has been amplified in a single 70cm rod type photonic crystal fibre (PCF), producing ~ 100μJ pulses in a burst mode at 2Hz (limited by diagnostics).