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where I'd like to be ...

Prof Subir Sarkar

Professor Emeritus

Research theme

  • Particle astrophysics & cosmology
  • Fundamental particles and interactions

Sub department

  • Rudolf Peierls Centre for Theoretical Physics

Research groups

  • Particle theory
Subir.Sarkar@physics.ox.ac.uk
Telephone: 01865 (2)73962
Rudolf Peierls Centre for Theoretical Physics, room 60.12
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  • IceCube@Oxford
  • Publications

IceCube

Physics World 2013 Breakthrough of the Year
IceCube at Oxford

I am a member since 2004 of the IceCube collaboration which discovered cosmic high energy neutrinos and identified some of their astrophysical sources.

IceCube @ Oxford

High-energy neutrinos from astrophysical accelerators of cosmic ray nuclei

(2007)

Authors:

Luis A Anchordoqui, Dan Hooper, Subir Sarkar, Andrew M Taylor

An upper limit to the photon fraction in cosmic rays above 1019 eV from the Pierre Auger Observatory

Astroparticle Physics 27:2-3 (2007) 155-168

Authors:

J Abraham, M Aglietta, C Aguirre, D Allard, I Allekotte, P Allison, C Alvarez, J Alvarez-Mu帽iz, M Ambrosio, L Anchordoqui, JC Anjos, C Aramo, K Arisaka, E Armengaud, F Arneodo, F Arqueros, T Asch, H Asorey, BS Atulugama, J Aublin, M Ave, G Avila, J Bacelar, T B盲cker, D Badagnani, AF Barbosa, HMJ Barbosa, M Barkhausen, D Barnhill, SLC Barroso, P Bauleo, J Beatty, T Beau, BR Becker, KH Becker, JA Bellido, S BenZvi, C Berat, T Bergmann, P Bernardini, X Bertou, PL Biermann, P Billoir, O Blanch-Bigas, F Blanco, P Blasi, C Bleve, H Bl眉mer, P Boghrat, M Boh谩膷ov谩, C Bonifazi, R Bonino, M Boratav, J Brack, JM Brunet, P Buchholz, NG Busca, KS Caballero-Mora, B Cai, DV Camin, JN Capdevielle, R Caruso, A Castellina, G Cataldi, L Caz贸n, R Cester, J Chauvin, A Chiavassa, JA Chinellato, A Chou, J Chye, D Claes, PDJ Clark, RW Clay, SB Clay, B Connolly, A Cordier, U Cotti, S Coutu, CE Covault, J Cronin, S Dagoret-Campagne, T Dang Quang, P Darriulat, K Daumiller, BR Dawson, RM de Almeida, LA de Carvalho, C De Donato, SJ de Jong, WJM de Mello, JRT de Mello Neto, I De Mitri, MAL de Oliveira, V de Souza, L del Peral, O Deligny, A Della Selva, C Delle Fratte, H Dembinski

Abstract:

An upper limit of 16% (at 95% c.l.) is derived for the photon fraction in cosmic rays with energies greater than 1019 eV, based on observations of the depth of shower maximum performed with the hybrid detector of the Pierre Auger Observatory. This is the first such limit on photons obtained by observing the fluorescence light profile of air showers. This upper limit confirms and improves on previous results from the Haverah Park and AGASA surface arrays. Additional data recorded with the Auger surface detectors for a subset of the event sample support the conclusion that a photon origin of the observed events is not favored. 漏 2006 Elsevier B.V. All rights reserved.

Anisotropy studies around the galactic centre at EeV energies with the Auger Observatory

Astroparticle Physics 27:4 (2007) 244-253

Authors:

J Abraham, M Aglietta, C Aguirre, D Allard, I Allekotte, P Allison, C Alvarez, J Alvarez-Mu帽iz, M Ambrosio, L Anchordoqui, JC Anjos, C Aramo, K Arisaka, E Armengaud, F Arneodo, F Arqueros, T Asch, H Asorey, BS Atulugama, J Aublin, M Ave, G Avila, J Bacelar, T B盲cker, D Badagnani, AF Barbosa, HMJ Barbosa, M Barkhausen, D Barnhill, SLC Barroso, P Bauleo, J Beatty, T Beau, BR Becker, KH Becker, JA Bellido, S BenZvi, C Berat, T Bergmann, P Bernardini, X Bertou, PL Biermann, P Billoir, O Blanch-Bigas, F Blanco, P Blasi, C Bleve, H Bl眉mer, P Boghrat, M Boh谩膷ov谩, C Bonifazi, R Bonino, M Boratav, J Brack, JM Brunet, P Buchholz, NG Busca, KS Caballero-Mora, B Cai, DV Camin, JN Capdevielle, R Caruso, A Castellina, G Cataldi, L Caz贸n, R Cester, J Chauvin, A Chiavassa, JA Chinellato, A Chou, J Chye, D Claes, PDJ Clark, RW Clay, SB Clay, B Connolly, A Cordier, U Cotti, S Coutu, CE Covault, J Cronin, S Dagoret-Campagne, TD Quang, P Darriulat, K Daumiller, BR Dawson, RM de Almeida, LA de Carvalho, C De Donato, SJ de Jong, WJM de Mello, JRT de Mello Neto, I De Mitri, MAL de Oliveira, V de Souza, L del Peral, O Deligny, AD Selva, CD Fratte, H Dembinski

Abstract:

Data from the Pierre Auger Observatory are analyzed to search for anisotropies near the direction of the Galactic Centre at EeV energies. The exposure of the surface array in this part of the sky is already significantly larger than that of the fore-runner experiments. Our results do not support previous findings of localized excesses in the AGASA and SUGAR data. We set an upper bound on a point-like flux of cosmic rays arriving from the Galactic Centre which excludes several scenarios predicting sources of EeV neutrons from Sagittarius A. Also the events detected simultaneously by the surface and fluorescence detectors (the 'hybrid' data set), which have better pointing accuracy but are less numerous than those of the surface array alone, do not show any significant localized excess from this direction. 漏 2006 Elsevier B.V. All rights reserved.

Anisotropy studies around the galactic centre at EeV energies with the Auger Observatory

ASTROPARTICLE PHYSICS 27:4 (2007) 244-253

Authors:

J Abraham, M Aglietta, C Aguirre, D Allard, I Allekotte, P Allison, C Alvarez, J Alvarez-Muniz, M Ambrosio, L Anchordoqui, JC Anjos, C Aramo, K Arisaka, E Armengaud, F Arneodo, F Arqueros, T Asch, H Asorey, BS Atulugama, J Aublin, M Ave, G Avila, J Bacelar, T Baecker, D Badagnani, AF Barbosa, HMJ Barbosa, M Barkhausen, D Barnhill, SLC Barroso, P Bauleo, J Beatty, T Beau, BR Becker, KH Becker, JA Bellido, S BenZvi, C Berat, T Bergmann, P Bernardini, X Bertou, PL Biermann, P Billoir, O Blanch-Bigas, F Blanco, P Blasi, C Bleve, H Bluemer, P Boghrat, M Bohacova, C Bonifazi, R Bonino, M Boratav, J Brack, JM Brunet, P Buchholz, NG Busca, KS Caballero-Mora, B Cai, DV Camin, JN Capdevielle, R Caruso, A Castellina, G Cataldi, L Cazon, R Cester, J Chauvin, A Chiavassa, JA Chinellato, A Chou, J Chye, D Claes, PDJ Clark, RW Clay, SB Clay, B Connolly, A Cordier, U Cotti, S Coutu, CE Covault, J Cronin, S Dagoret-Campagne, T Dang Quang, P Darriulat, K Daumiller, BR Dawson, RM de Almeida, LA de Carvalho, C De Donato, SJ de Jong, WJM de Mello Junior, JRT de Mello Neto, I De Mitri, MAL de Oliveira, V de Souza, L del Peral, O Deligny, A Della Selva, C Delle Fratte, H Dembinski, C Di Giulio, JC Diaz, C Dobrigkeit, JC D'Olivo, D Dornic, A Dorofeev, MT Dova, D D'Urso, MA DuVernois, R Engel, L Epele, M Erdmann, CO Escobar, A Etchegoyen, A Ewers, P Facal San Luis, H Falcke, AC Fauth, D Fazio, N Fazzini, A Fernandez, F Ferrer, S Ferry, B Fick, A Filevich, A Filipcic, I Fleck, E Fokitis, R Fonte, D Fuhrmann, W Fulgione, B Garcia, D Garcia-Pinto, L Garrard, X Garrido, H Geenen, G Gelmini, H Gemmeke, A Geranios, PL Ghia, M Giller, J Gitto, H Glass, F Gobbi, MS Gold, F Gomez Albarracin, M Gomez Berisso, R Gomez Herrero, M Goncalves do Amaral, JP Gongora, D Gonzalez, JG Gonzalez, M Gonzalez, D Gora, A Gorgi, P Gouffon, V Grassi, A Grillo, C Grunfeld, C Grupen, F Guarino, GP Guedes, J Gutierrez, JD Hague, JC Hamilton, MN Harakeh, D Hararl, S Harmsma, S Hartmann, JL Harton, A Haungs, MD Healy, T Hebbeker, D Heck, C Hojvat, P Homola, J Hoerandel, A Horneffer, M Horvat, M Hrabovsky, T Huege, M Iarlori, A Insolia, M Kaducak, O Kalashev, KH Kampert, B Keilhauer, E Kemp, HO Klages, M Kleifges, J Kleinfeller, R Knapik, J Knapp, D-H Koang, Y Kolotaev, A Kopmann, O Kroemer, S Kuhlman, J Kuijpers, N Kunka, A Kusenko, C Lachaud, BL Lago, D Lebrun, P LeBrun, J Lee, A Letessier-Selvon, M Leuthold, I Lhenry-Yvon, G Longo, R Lopez, A Lopez Aguera, A Lucero, S Maldera, M Malek, S Maltezos, G Mancarella, ME Mancenido, D Mandat, P Mantsch, AG Mariazzi, IC Maris, D Martello, N Martinez, J Martinez, O Mart铆nez, HJ Mathes, J Matthews, JAJ Matthews, G Matthiae, G Maurin, D Maurizio, PO Mazur, T McCauley, M McEwen, RR McNeil, G Medina, MC Medina, R Meyhandan, MI Micheletti, G Miele, W Miller, S Mollerach, M Monasor, D Monnier Ragaigne, F Montanet, B Morales, C Morello, E Moreno, C Morris, M Mostafa, MA Muller, R Mussa, G Navarra, L Nellen, C Newman-Holmes, D Newton, T Nguyen Thi, R Nichol, N Nierstenhoefer, D Nitz, H Nogima, D Nosek, L Nozka, J Oehlschlaeger, T Ohnuki, A Olinto, LFA Oliveira, VM Olmos-Gilbaja, M Ortiz, S Ostapchenko, L Otero, M Palatka, J Pallotta, G Parente, E Parizot, S Parlati, M Patel, T Paul, K Payet, M Pech, J Pekala, R Pelayo, IM Pepe, L Perrone, S Petrera, P Petrinca, Y Petrov, D Pham Ngoc, TN Pham Thi, R Piegaia, T Pierog, O Pisanti, TA Porter, J Pouryamout, L Prado Junior, P Privitera, M Prouza, EJ Quel, J Rautenberg, HC Reis, S Reucroft, B Revenu, J Ridky, A Risi, M Risse, C Riviere, V Rizi, S Robbins, M Roberts, C Robledo, G Rodriguez, D Rodriguez Frias, J Rodriguez Martino, J Rodriguez Rojo, G Ros, J Rosado, M Roth, C Roucelle, B Rouille-d'Orfeuil, E Roulet, AC Rovero, F Salamida, H Salazar, G Salina, F Sanchez, M Santander, EM Santos, S Sarkar, R Sato, V Scherini, H Schieler, T Schmidt, O Scholten, P Schovanek, F Schuessler, SJ Sciutto, M Scuderi, D Semikoz, G Sequeiros, RC Shellard, BB Siffert, G Sigl, P Skelton, W Slater, N Smetniansky De Grande, A Smialkowski, R Smida, BE Smith, GR Snow, P Sokolsk, P Sommers, J Sorokin, H Spinka, E Strazzeri, A Stutz, F Suarez, T Suomijarvi, AD Supanitsky, J Swain, Z Szadkowski, A Tamashiro, A Tamburro, O Tascau, R Ticona, C Timmermans, W Tkaczyk, CJ Todero Peixoto, A Tonachini, D Torresi, P Travnicek, A Tripathi, G Tristram, D Tscherniakhovski, M Tueros, V Tunnicliffe, R Ulrich, M Unger, M Urban, JF Valdes Galicia, I Valino, L Valore, AM van den Berg, V van Elewyck, RA Vazquez, D Veberic, A Veiga, A Velarde, T Venters, V Verzi, M Videla, L Villasenor, T Vo Van, S Vorobiov, L Voyvodic, H Wahlberg, O Wainberg, T Waldenmaier, P Walker, D Warner, AA Watson, S Westerhoff, C Wiebusch, G Wieczorek, L Wiencke, B Wilczynska, H Wilczynski, C Wileman, MG Winnick, J Xu, T Yamamoto, P Younk, E Zas, D Zavrtanik, M Zavrtanik, A Zech, A Zepeda, M Zha, M Ziolkowski

The intergalactic propagation of ultrahigh energy cosmic ray nuclei

Astropart.Phys. 27 (2007) 199-212

Authors:

Dan Hooper, Subir Sarkar, Andrew M Taylor

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