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Vector meson production in the final state K+K-Ï€+Ï€- of photon-photon collisions

Zeitschrift Fur Physik C Particles and Fields 32:1 (1986) 11-19

Authors:

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

Abstract:

Vector meson production is studied in the reaction γγ→K+K-π+π-. A clear Φ(1020) signal is seen in the K+K- mass distribution and a K*0 (890) signal is visible in the K±π∓ one. Both do not seem to be strongly correlated with quasi two body final states. Cross sections for the processes γγ→K+K-π+π-, γγ→Φπ+π-, γγ→K+0K±π∓ and upper limits for the production of Φp, ΦΦ and K*0 {Mathematical expression} are given as function of the invariant γγ mass. © 1986 Springer-Verlag.

Inclusive φ production in B-meson decay

Physical Review Letters American Physical Society (APS) 56:8 (1986) 800-803

Authors:

D Bortoletto, A Chen, L Garren, M Goldberg, N Horwitz, A Jawahery, P Lubrano, GC Moneti, CG Trahern, H van Hecke, SE Csorna, MD Mestayer, RS Panvini, GB Word, Xia Yi, A Bean, T Ferguson, P Avery, C Bebek, K Berkelman, E Blucher, DG Cassel, T Copie, R DeSalvo, JW DeWire, R Ehrlich, RS Galik, MGD Gilchriese, B Gittelman, SW Gray, AM Halling, DL Hartill, BK Heltsley, S Holzner, M Ito, J Kandaswamy, R Kowalewski, DL Kreinick, Y Kubota, NB Mistry, J Mueller, E Nordberg, M Ogg, D Peterson, D Perticone, M Pisharody, K Read, D Riley, A Silverman, PC Stein, S Stone, AJ Sadoff, T Bowcock, RT Giles, J Hassard, K Kinoshita, FM Pipkin, Richard Wilson, P Haas, M Hempstead, T Jensen, H Kagan, R Kass, S Behrends, T Gentile, Jan M Guida, Joan A Guida, F Morrow, R Poling, C Rosenfeld, EH Thorndike, P Tipton, D Besson, J Green, R Namjoshi, F Sannes, P Skubic, R Stone, MS Alam, N Katayama, IJ Kim, CR Sun, V Tanikella

Inclusive π0 production by e+e- annihilation at 34.6 GeV center of mass energy

Zeitschrift Fur Physik C Particles and Fields 33:1 (1986) 13-22

Authors:

W Braunschweig, R Gerhards, FJ Kirschfink, HU Martyn, P Rosskamp, E Vogel, W Wallraff, B Bock, J Eisenmann, HM Fischer, H Hartmann, E Hilger, A Jocksch, H Kolanoski, H Kück, V Mertens, R Wedemeyer, B Foster, AJ Martin, E Bernardi, Y Eisenberg, A Eskreys, K Gather, H Hultschig, P Joos, B Klima, H Kowalski, A Ladage, B Löhr, D Lüke, P Mättig, A Montag, D Notz, A Shapira, D Trines, T Tymieniecka, G Tysarczyk, R Walczak, G Wolf, G Yekutieli, W Zeuner, T Kracht, HL Krasemann, J Krueger, E Lohrmann, G Poelz, KU Poesnecker, DM Binnie, PJ Dornan, DA Garbutt, C Jenkins, WG Jones, JK Sedgbeer, J Shulman, D Su, AP Watson, F Barreiro, E Ros, C Balkwill, MG Bowler, PN Burrows, RJ Cashmore, P Dauncey, R Devenish, G Heath, DJ Mellor, P Ratoff, I Tomalin, JM Yelton, SL Lloyd, GE Forden, JC Hart, DK Hasell, DH Saxon, S Brandt, M Holder, L Labarga, B Neumann, U Karshon, G Mikenberg, R Mir, D Revel, E Ronat, N Wainer, G Baranko, A Caldwell, M Cherney, JM Izen, S Ritz, D Strom, M Takashima, E Wicklund, SL Wu, G Zobernig

Abstract:

The cross section for the process e+e-→϶Ä0+ anything has been measured at an average center of mass energy of 34.6 GeV for Ï€0 energies between 0.7 and 17 GeV. The angular distribution for Ï€0 energies larger than 2 GeV is of the form dσ/dΩ∼1+Acos2θ, with A=1.2±0.5. The ratio of Ï€0 to π± production in the measured energy range is 2σ(Ï€0)/(σ(Ï€+)+σ(Ï€-))=1.13±0.18 The form of the differential cross sections agrees within the errors. The mean Ï€0 multiplicity is 5.8±0.9. © 1986 Springer-Verlag.

Search for monoenergetic photons from Υ(1S)→γ+X

Physical Review D American Physical Society (APS) 33:1 (1986) 300-302

Authors:

D Besson, J Green, R Namjoshi, F Sannes, P Skubic, R Stone, MS Alam, N Katayama, IJ Kim, CR Sun, V Tanikella, D Bortoletto, A Chen, L Garren, M Goldberg, N Horwitz, A Jawahery, P Lubrano, GC Moneti, CG Trahern, H van Hecke, SE Csorna, MD Mestayer, RS Panvini, GB Word, Xia Yi, A Bean, T Ferguson, P Avery, C Bebek, K Berkelman, E Blucher, DG Cassel, T Copie, R DeSalvo, JW DeWire, R Ehrlich, RS Galik, MGD Gilchriese, B Gittelman, SW Gray, AM Halling, DL Hartill, BK Heltsley, S Holzner, M Ito, J Kandaswamy, R Kowalewski, DL Kreinick, Y Kubota, NB Mistry, J Mueller, E Nordberg, M Ogg, D Peterson, D Perticone, M Pisharody, K Read, D Riley, A Silverman, PC Stein, S Stone, AJ Sadoff, T Bowcock, RT Giles, J Hassard, K Kinoshita, FM Pipkin, Richard Wilson, P Haas, M Hempstead, T Jensen, H Kagan, R Kass, S Behrends, T Gentile, Jan M Guida, Joan A Guida, F Morrow, R Poling, C Rosenfeld, EH Thorndike, P Tipton

The production and decay of Tau leptons in e+e- annihilation at PETRA energies

Zeitschrift Fur Physik C Particles and Fields 26:4 (1985) 521-530

Authors:

M Althoff, W Braunschweig, FJ Kirschfink, K Lübelsmeyer, HU Martyn, P Rosskamp, D Schmitz, 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 Eskreys, K Gather, M Hildebrandt, H Hultschig, P Joos, U Kötz, H Kowalski, A Ladage, B Löhr, D Lüke, P Mättig, D Notz, RJ Nowak, J Pyrlik, E Ronat, M Rushton, W Schütte, D Trines, T Tymieniecka, G Wolf, G Yekutieli, C Xiao, R Fohrmann, E Hilger, T Kracht, HL Krasemann, P Leu, E Lohrmann, D Pandoulas, G Poelz, KU Pösnecker, BH Wiik, R Beuselinck, DM Binnie, AJ Campbell, PJ Dornan, DA Garbutt, C Jenkins, TD Jones, WG Jones, J McCardle, JK Sedgbeer, J Thomas, WAT Wan Abdullah, KW Bell, MG Bowler, P Bull, RJ Cashmore, PEL Clarke, P Dauncey, R Devenish, P Grossmann, CM Hawkes, SL Lloyd, DJ Mellor, C Youngman, GE Forden, JC Hart, J Harvey, DK Hasell, DH Saxon, PL Woodworth, F Barreiro, S Brandt, M Dittmar, M Holder, G Kreutz, B Neumann, E Duchovni, Y Eisenberg, U Karshon, G Mikenberg, R Mir, D Revel, A Shapira, G Baranko, A Caldwell, M Cherney, JM Izen, M Mermikides, S Ritz

Abstract:

We have observed Ï„ pair production at average CM energies of 13.9, 22.3, 34.5 and 43.1 GeV. The cross-sections are consistent with QED, the cut off parameters being Λ+>161 GeV and Λ-169 GeV (95% CL). The topological branching fraction of the Ï„ to 1 charged particle, B1, is 0.847±0.011 (stat)-0.013 +0.016(syst) and no decays to 5 charged particles were observed resulting in B5<0.007 (95% CL). Within the 3 charged track final state B(Ï„-→϶Ä-Ï€+Ï€- ±¹)/(µþ(Ï„-→϶Ä- Ï€+Ï€- ±¹)+µþ(Ï„-→϶Ä-Ï€+Ï€ -Ï€0v))=0.37-0.20 +0.35 © 1985 Springer-Verlag.