Abstract
7 páginas, 4 figuras, 1 tabla.-- PACS nrs.: 13.85.Rm, 11.25.Wx, 13.85.Qk, 14.80.-j.-- CDF Collaboration: et al.
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.
This work was supported by the U.S. Department of
Energy and National Science Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the Ministry of Education, Culture, Sports, Science and Technology of Japan; the Natural Sciences and Engineering Research Council of Canada; the National Science Council of the
Republic of China; the Swiss National Science Foundation; the A. P. Sloan Foundation; the Bundesministerium fÜr Bildung und Forschung, Germany; the Korean Science and Engineering Foundation and the Korean Research Foundation; the Science and Technology Facilities Council and the Royal Society, UK; the Institut National
de Physique Nucleaire et Physique des Particules/CNRS; the Russian Foundation for Basic Research; the Comisión Interministerial de Ciencia y Tecnología, Spain; the European Community’s Human Potential Programme; the Slovak R&D Agency; and the Academy of Finland.
Peer reviewed