Search for the decay B0-->gammagamma

• Published in: Physical review letters 2001-12, Vol.87 (24), p.241803-241803
• Main Authors: Aubert, B, Boutigny, D, Gaillard, J M, Hicheur, A, Karyotakis, Y, Lees, J P, Robbe, P, Tisserand, V, Palano, A, Chen, G P, Chen, J C, Qi, N D, Rong, G, Wang, P, Zhu, Y S, Eigen, G, Reinertsen, P L, Stugu, B, Abbott, B, Abrams, G S, Borgland, A W, Breon, A B, Brown, D N, Button-Shafer, J, Cahn, R N, Clark, A R, Gill, M S, Gritsan, A, Groysman, Y, Jacobsen, R G, Kadel, R W, Kadyk, J, Kerth, L T, Kluth, S, Kolomensky, Y G, Kral, J F, LeClerc, C, Levi, M E, Liu, T, Lynch, G, Meyer, A B, Momayezi, M, Oddone, P J, Perazzo, A, Pripstein, M, Roe, N A, Romosan, A, Ronan, M T, Shelkov, V G, Telnov, A V, Wenzel, W A, Bright-Thomas, P G, Harrison, T J, Hawkes, C M, Knowles, D J, O'Neale, S W, Penny, R C, Watson, A T, Watson, N K, Deppermann, T, Goetzen, K, Koch, H, Krug, J, Kunze, M, Lewandowski, B, Peters, K, Schmuecker, H, Steinke, M, Andress, J C, Barlow, N R, Bhimji, W, Chevalier, N, Clark, P J, Cottingham, W N, De Groot, N, Dyce, N, Foster, B, McFall, J D, Wallom, D, Wilson, F F, Abe, K, Hearty, C, Mattison, T S, McKenna, J A, Thiessen, D, Jolly, S, McKemey, A K, Tinslay, J, Blinov, V E, Bukin, A D, Bukin, D A, Buzykaev, A R, Golubev, V B, Ivanchenko, V N, Korol, A A, Kravchenko, E A, Onuchin, A P, Salnikov, A A, Serednyakov, S I, Skovpen, Y I
• Format: Article
• Language: English
• ISSN: 0031-9007

We present a limit on the branching fraction for the decay B0-->gammagamma using data collected at the Upsilon(4S) resonance with the BABAR detector at the PEP-II asymmetric energy e+e- collider. Based on the observation of one event in the signal region, out of a sample of 21.3x10(6) e+e--->Upsilon(4S)-->BB decays, we establish an upper limit on the branching fraction of B(B0-->gammagamma)