Observation of J/ψ→3γ

Physical Review Letters 101:10 (2008)

Authors:

GS Adams, M Anderson, JP Cummings, I Danko, D Hu, B Moziak, J Napolitano, Q He, J Insler, H Muramatsu, CS Park, EH Thorndike, F Yang, M Artuso, S Blusk, S Khalil, J Li, R Mountain, S Nisar, K Randrianarivony, N Sultana, T Skwarnicki, S Stone, JC Wang, LM Zhang, G Bonvicini, D Cinabro, M Dubrovin, A Lincoln, P Naik, J Rademacker, DM Asner, KW Edwards, J Reed, RA Briere, T Ferguson, JSY Ma, G Tatishvili, H Vogel, ME Watkins, JL Rosner, JP Alexander, DG Cassel, JE Duboscq, R Ehrlich, L Fields, RS Galik, L Gibbons, R Gray, SW Gray, DL Hartill, BK Heltsley, D Hertz, JM Hunt, J Kandaswamy, DL Kreinick, VE Kuznetsov, J Ledoux, H Mahlke-Krüger, D Mohapatra, PUE Onyisi, JR Patterson, D Peterson, D Riley, A Ryd, AJ Sadoff, X Shi, S Stroiney, WM Sun, T Wilksen, SB Athar, R Patel, J Yelton, P Rubin, BI Eisenstein, I Karliner, S Mehrabyan, N Lowrey, M Selen, EJ White, J Wiss, RE Mitchell, MR Shepherd, D Besson, TK Pedlar, D Cronin-Hennessy, KY Gao, J Hietala, Y Kubota, T Klein, BW Lang, R Poling, AW Scott, P Zweber, S Dobbs, Z Metreveli, KK Seth, A Tomaradze, J Libby, A Powell

Abstract:

We report the first observation of the decay J/ψ→3γ. The signal has a statistical significance of 6σ and corresponds to a branching fraction of B(J/ψ→3γ)=(1.2±0.3±0.2)×10-5, in which the errors are statistical and systematic, respectively. The measurement uses ψ(2S)→π+π-J/ψ events acquired with the CLEO-c detector operating at the CESR e+e- collider. © 2008 The American Physical Society.

The death of massive stars - I. Observational constraints on the progenitors of type II-P supernovae

(2008)

Authors:

SJ Smartt, JJ Eldridge, RM Crockett, JR Maund

Massive stars exploding in a He-rich circumstellar medium – II. The transitional case of SN 2005la

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 389:1 (2008) 131-140

Authors:

A Pastorello, RM Quimby, SJ Smartt, S Mattila, H Navasardyan, RM Crockett, N Elias-Rosa, P Mondol, JC Wheeler, DR Young

Massive stars exploding in a He-rich circumstellar medium – I. Type Ibn (SN 2006jc-like) events

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 389:1 (2008) 113-130

Authors:

A Pastorello, S Mattila, L Zampieri, M Della Valle, SJ Smartt, S Valenti, I Agnoletto, S Benetti, CR Benn, D Branch, E Cappellaro, M Dennefeld, JJ Eldridge, A Gal-Yam, A Harutyunyan, I Hunter, H Kjeldsen, Y Lipkin, PA Mazzali, P Milne, H Navasardyan, EO Ofek, E Pian, O Shemmer, S Spiro, RA Stathakis, S Taubenberger, M Turatto, H Yamaoka

Massive stars exploding in a He-rich circumstellar medium – III. SN 2006jc: infrared echoes from new and old dust in the progenitor CSM

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 389:1 (2008) 141-155

Authors:

S Mattila, WPS Meikle, P Lundqvist, A Pastorello, R Kotak, J Eldridge, S Smartt, A Adamson, CL Gerardy, L Rizzi, AW Stephens, SD Van Dyk