@article{10902/13902,
year = {2014},
month = {3},
url = {http://hdl.handle.net/10902/13902},
abstract = {A search for forbidden and exotic Z boson decays in the diphoton mass spectrum is presented for the first time in hadron collisions, based on data corresponding to10.0fb−1of integrated luminosity from proton-antiproton collisions at vs=1.96 TeV collected by the CDF experiment. No evidence of signal is observed, and 95% credibility level Bayesian upper limits are set on the branching ratios of decays of the Z boson to a photon and neutral pion (which is detected as a photon), a pair of photons, and a pair of neutral pions. The observed branching ratio limits are 2.01×10−5forZ→π0γ, 1.46×10−5forZ→γγ, and 1.52×10−5forZ→π0π0. The Z→π0γ and Z→γγ limits improve the most stringent results from other experiments by factors of 2.6 and 3.6, respectively. The Z→π0π0 branching ratio limit is the first experimental result on this decay.},
organization = {We thank the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. Thiswork was supported by the U.S. Department of Energy and National Science Foundation; the Italian Istituto Nazionaledi 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 World Class University Program, the National Research Foundation of Korea; the Science and Technology Facilities Council and the Royal Society, United Kingdom; the Russian Foundation for Basic Research; the Ministerio de Ciencia e Innovación,and Programa Consolider-Ingenio 2010, Spain; the Slovak R&D Agency; the Academy of Finland; the Australian Research Council (ARC); and the EU community Marie Curie Fellowship Contract No. 302103.},
publisher = {American Physical Society},
publisher = {Phys. Rev. Lett. Vol. 112, Num. 11, Pag. 111803 (2014)},
title = {First Search for Exotic Z Boson Decays into Photons and Neutral Pions in Hadron Collisions},
author = {Aaltonen, Timo Antero and Casal Laraña, Bruno and Cuevas Maestro, Francisco Javier and Gómez Gramuglio, Gervasio and Palencia Cortezón, José Enrique and Ruiz Jimeno, Alberto and Scodellaro, Luca and Vilar Cortabitarte, Rocío and Vizán García, Jesús Manuel},
}