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Open Access item Search for High-Mass Diphoton States and Limits on Randall-Sundrum Gravitons at CDF

Authors:Aaltonen, T.
Chuang, S. H.
Rodrigo, Teresa
Ruiz Jimeno, Alberto
Cuenca Almenar, Cristóbal
Gómez, G.
Palencia, Enrique
Cuevas, Javier
Piedra, Jonatan
Cabrera, Susana
Scodellaro, Luca
Vila, Iván
Vilar, Rocío
Casal, Bruno
Keywords:To-leading Order, Electromagnetic Calorimeter, Hierarchy
Issue Date:22-Oct-2007
Publisher:American Physical Society
Citation:Physical Review Letters 99(17): 171801 (2007)
Abstract:We have performed a search for new particles which decay to two photons using 1.2 fb(-1) of integrated luminosity from p(p)over-bar collisions at sqrt{s} = 1.96 TeV collected using the CDF II detector at the Fermilab Tevatron. We find the diphoton mass spectrum to be in agreement with the standard model expectation, and set limits on the cross section times branching ratio for the Randall-Sundrum graviton, as a function of diphoton mass. We subsequently derive lower limits for the graviton mass of 230 GeV/c^2 and 850 GeV/c^2, at the 95% confidence level, for coupling parameters (k/(M)over-bar_Pl) of 0.01 and 0.1, respectively.
Description:7 páginas, 4 figuras, 1 tabla.-- PACS nrs.: 13.85.Rm, 11.25.Wx, 13.85.Qk, 14.80.-j.-- CDF Collaboration: et al.
Publisher version (URL):http://dx.doi.org/10.1103/PhysRevLett.99.171801
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