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Cosmic ray antiprotons from nearby cosmic accelerators
Institution:1. Department of Urology, Weill Cornell Medical College, New York Presbyterian Hospital, New York, NY, USA;2. Department of Urology, University Medical-Center Hamburg-Eppendorf, Hamburg, Germany;3. Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada;4. Department of Urology, Memorial Sloan-Kettering Cancer Center, Kimmel Center for Prostate and Urologic Tumors, New York, NY, USA;5. Academic Urology Unit, University of Sheffield, Sheffield, UK;6. Scott Department of Urology, Baylor College of Medicine, Houston, TX, USA;7. Department of Urology, Eberhard-Karls University, Tuebingen, Germany;8. EORTC Headquarters, Brussels, Belgium;9. Department of Epidemiology and Biostatistics, Memorial Sloan-Kettering Cancer Center, New York, NY, USA;10. Department of Urology, Cochin Hospital, Assistance Publique-Hôpitaux de Paris, Paris Descartes University, Paris, France;11. Department of Urology, Medical University of Vienna, Vienna, Austria;12. Department of Urology, UT Southwestern, Dallas, TX, USA;13. Division of Medical Oncology, Weill Cornell Medical College, New York Presbyterian Hospital, New York, NY, USA;1. Department of Psychology, Yale University, New Haven, CT, U.S.A;2. School of Anthropology, University of Arizona, Tucson, AZ, U.S.A;3. Canine Companions for Independence, National Headquarters, Santa Rosa, CA, U.S.A;4. Cognitive Science Program, University of Arizona, Tucson, AZ, U.S.A;5. Department of Psychology, Boston College, Chestnut Hill, MA, U.S.A;6. Department of Psychology, University of Arizona, Tucson, AZ, U.S.A;7. College of Veterinary Medicine, University of Arizona, Tucson, AZ, U.S.A;1. Nutrition Innovation Centre for Food and Health (NICHE), School of Biomedical Sciences, Ulster University, Coleraine BT52 1SA, United Kingdom;2. Devenish Nutrition Ltd., Lagan House, Belfast BT1 3BG, United Kingdom;3. Agri-Food and Biosciences Institute, Headquarters, 18a Newforge Lane, Belfast BT9 5PX, United Kingdom;1. Resident, Department of Oral and Maxillofacial Surgery, Thomas Jefferson University Hospitals, Philadelphia, PA;2. Program Director, Department of Oral and Maxillofacial Surgery, Thomas Jefferson University Hospitals, Philadelphia, PA;3. Professor, Department of Otolaryngology/Head and Neck Surgery, Thomas Jefferson University Hospitals, Philadelphia, PA;1. Institut für Kernphysik, KIT – Karlsruher Institut für Technologie, Germany;2. Universidad Michoacana, Instituto de Física y Matemáticas, Morelia, Mexico;3. Dipartimento di Fisica, Università degli Studi di Torino, Italy;4. Institut für Experimentelle Kernphysik, KIT – Karlsruher Institut für Technologie, Germany;5. Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, Romania;6. Osservatorio Astrofisico di Torino, INAF Torino, Italy;7. Universidade São Paulo, Instituto de Física de São Carlos, Brazil;8. Fachbereich Physik, Universität Wuppertal, Germany;9. Department of Physics, Siegen University, Germany;10. Deptartment of Astrophysics, Radboud University Nijmegen, The Netherlands;11. National Centre for Nuclear Research, Department of Astrophysics, ?ód?, Poland;12. Department of Physics, University of Bucharest, Bucharest, Romania
Abstract:The antiproton flux measured by PAMELA experiment might have originated from Galactic sources of cosmic rays. These antiprotons are expected to be produced in the interactions of cosmic ray protons and nuclei with cold protons. Gamma rays are also produced in similar interactions inside some of the cosmic accelerators. We consider a few nearby supernova remnants observed by Fermi LAT. Many of them are associated with molecular clouds. Gamma rays have been detected from these sources which most likely originate in decay of neutral pions produced in hadronic interactions. The observed gamma ray fluxes from these SNRs are used to find out their contributions to the observed diffuse cosmic ray antiproton flux near the earth.
Keywords:Cosmic rays  Antiprotons  Gamma rays
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