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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
Old homepage
Brief CV
  • About
  • Research
  • Teaching
  • Service
  • Outreach
  • Awards/News
  • 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

Implications of cosmic ray results for UHE neutrinos

ArXiv 0811.0375 (2008)

Abstract:

Recent measurements of the spectrum and composition of ultrahigh energy cosmic rays suggest that their extragalactic sources may be accelerating heavy nuclei in addition to protons. This can suppress the cosmogenic neutrino flux relative to the usual expectation for an all-proton composition. Cosmic neutrino detectors may therefore need to be even larger than currently planned but conversely they will also be able to provide valuable information concerning astrophysical accelerators. Moreover measurement of ultrahigh energy cosmic neutrino interactions can provide an unique probe of QCD dynamics at high parton density.
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Implications of cosmic ray results for UHE neutrinos

(2008)
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Review of particle physics

667:1-5 (2008) 1-+

Authors:

C Amsler, M Doser, M Antonelli, DA Asner, KS Babu, H Baer, HR Band, RM Barnett, E Bergren, J Beringer, G Bernardi, V Bertl, H Bichsel, O Biebel, P Bloch, E Blucher, S Blusk, RN Cahn, M Carena, C Caso, A Cecccci, D Chakraborty, MC Chen, RS Chivukula, G Cowan, O Dahl, G D'Ambrosio, T Damour, A de Gouvea, T DeGrand, B Dobrescu, A Drees, DA Edwards, S Eidelman, VD Elvira, J Erler, VV Ezhela, JL Feng, W Fetscher, BD Fields, B Foster, TK Gaisser, L Garren, HJ Gerber, G Gerbier, T Gherghetta, GF Giudice, A Goodman, C Grab, AV Gritsan, JF Grivaz, DE Groom, M Grunewald, A Gurtu, T Gutsche, HE Haber, K Hagiwara, C Hagmann, KG Hayes, JJ Hernandez-Rey, K Hikasa, I Hincliliffe, A Hocker, J Huston, P Igo-Kemenes, JD Jackson, KF Johnson, T Junk, D Karlen, B Kayser, D Kirkby, SR Klein, IG Knowles, C Kolda, RV Kowalewski, P Kreitz, B Krusche, YV Kuyanov, Y Kwon, O Lahav, P Langacker, A Liddle, Z Ligeti, CJ Lin, TM Liss, L Littenberg, JC Liu, KS Lugovsky, SB Lugovsky, H Mahlke, ML Mangano, T Mannel, AV Manohar, WJ Marciano, AD Martin, A Masoni, M Milstead, R Miquel, K Moenig, H Murayama, K Nakamura, M Narain, P Nason, S Navas, P Nevski, Y Nir, KA Olive, L Pape, C Patrignani, JA Peacock, A Piepke, G Punzi, A Quadt, S Raby, G Raffelt, BN Rateliff, B Renk, P Richardson, S Roesler, S Rolli, A Romaniouk, LJ Rosenberg, JL Rosner, CT Sachrajda, Y Sakai, S Sarkar, F Sauli, O Schneider, D Scott, WG Seligman, MH Shaevitz, T Sjostrand, JG Smith, GF Smoot, S Spanier, H Spieler, A Stahl, T Stanev, SL Stone, T Surniyoshi, M Tanabashi, J Terning, M Titov, NP Tkachenko, NA Tornqvist, D Tovey, GH Trilling, TG Trippe, G Valencia, K van Bibber, MG Vincter, P Vogel, DR Ward, T Watari, BR Vebber, G Weiglein, JD Wells, M Whalley, A Wheeler, CG Wohl, L Wolfenstein, J Womersley, CL Woody, RL Workmnan, A Yamamoto, WM Yao, OV Zenin, J Zhang, RY Zhu, PA Zyla, Particle Data Grp

Abstract:

This biennial Review summarizes much of particle physics. Using data from previous editions., plus 2778 new measurements from 645 papers, we list, evaluate, and average measured properties of gauge bosons, leptons, quarks, mesons, and baryons. We also summarize searches for hypothetical particles such as Higgs bosons, heavy neutrinos, and supersymmetric particles. All the particle properties and search limits are listed in Summary Tables. We also give numerous tables, figures, formulae, and reviews of topics such as the Standard Model, particle detectors., probability, and statistics. Among the 108 reviews are many that are new or heavily revised including those on CKM quark-mixing matrix, V-ud & V-us, V-cb & V-ub, top quark, muon anomalous magnetic moment, extra dimensions, particle detectors, cosmic background radiation, dark matter, cosmological parameters, and big bang cosmology.
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Review of Particle Physics

Elsevier 667:1-5 (2008) 1-6

Authors:

Particle Data Group, C Amsler, M Doser, M Antonelli, DM Asner, KS Babu, H Baer, HR Band, RM Barnett, E Bergren, J Beringer, G Bernardi, W Bertl, H Bichsel, O Biebel, P Bloch, E Blucher, S Blusk, RN Cahn, M Carena, C Caso, A Ceccucci, D Chakraborty, M-C Chen, RS Chivukula, G Cowan, O Dahl, G D'Ambrosio, T Damour, A de Gouvêa, T DeGrand, B Dobrescu, M Drees, DA Edwards, S Eidelman, VD Elvira, J Erler, VV Ezhela, JL Feng, W Fetscher, BD Fields, B Foster, TK Gaisser, L Garren, H-J Gerber, G Gerbier, T Gherghetta, GF Giudice, M Goodman, C Grab, AV Gritsan, J-F Grivaz, DE Groom, M Grünewald, A Gurtu, T Gutsche, HE Haber, K Hagiwara, C Hagmann, KG Hayes, JJ Hernández-Rey, K Hikasa, I Hinchliffe, A Höcker, J Huston, P Igo-Kemenes, JD Jackson, KF Johnson, T Junk, D Karlen, B Kayser, D Kirkby, SR Klein, IG Knowles, C Kolda, RV Kowalewski, P Kreitz, B Krusche, Yu V Kuyanov, Y Kwon, O Lahav, P Langacker, A Liddle, Z Ligeti, C-J Lin, TM Liss, L Littenberg, JC Liu, KS Lugovsky, SB Lugovsky, H Mahlke, ML Mangano, T Mannel, AV Manohar, WJ Marciano, AD Martin, A Masoni, D Milstead, R Miquel, K Mönig, H Murayama, K Nakamura, M Narain, P Nason, S Navas, P Nevski, Y Nir, KA Olive, L Pape, C Patrignani, JA Peacock, A Piepke, G Punzi, A Quadt, S Raby, G Raffelt, BN Ratcliff, B Renk, P Richardson, S Roesler, S Rolli, A Romaniouk, LJ Rosenberg, JL Rosner, CT Sachrajda, Y Sakai, S Sarkar, F Sauli, O Schneider, D Scott, WG Seligman, MH Shaevitz, T Sjöstrand, JG Smith, GF Smoot, S Spanier, H Spieler, A Stahl, T Stanev, SL Stone, T Sumiyoshi, M Tanabashi, J Terning, M Titov, NP Tkachenko, NA Törnqvist, D Tovey, GH Trilling, TG Trippe, G Valencia, K van Bibber, MG Vincter, P Vogel, DR Ward, T Watari, BR Webber, G Weiglein, JD Wells, M Whalley, A Wheeler, CG Wohl, L Wolfenstein, J Womersley, CL Woody, RL Workman, A Yamamoto, W-M Yao, OV Zenin, J Zhang, R-Y Zhu, PA Zyla, G Harper, VS Lugovsky, P Schaffner

Abstract:

This biennial Review summarizes much of particle physics. Using data from previous editions, plus 2778 new measurements from 645 papers, we list, evaluate, and average measured properties of gauge bosons, leptons, quarks, mesons, and baryons. We also summarize searches for hypothetical particles such as Higgs bosons, heavy neutrinos, and supersymmetric particles. All the particle properties and search limits are listed in Summary Tables. We also give numerous tables, figures, formulae, and reviews of topics such as the Standard Model, particle detectors, probability, and statistics. Among the 108 reviews are many that are new or heavily revised including those on CKM quark-mixing matrix, Vud & Vus, Vcb & Vub, top quark, muon anomalous magnetic moment, extra dimensions, particle detectors, cosmic background radiation, dark matter, cosmological parameters, and big bang cosmology.A booklet is available containing the Summary Tables and abbreviated versions of some of the other sections of this full Review. All tables, listings, and reviews (and errata) are also available on the Particle Data Group website: http://pdg.lbl.gov.
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Observation of the suppression of the flux of cosmic rays above 4 x 10 (19) eV.

Phys Rev Lett 101:6 (2008) 061101

Authors:

J Abraham, P Abreu, M Aglietta, C Aguirre, D Allard, I Allekotte, J Allen, P Allison, J Alvarez-Muñiz, M Ambrosio, L Anchordoqui, S Andringa, A Anzalone, C Aramo, S Argirò, K Arisaka, E Armengaud, F Arneodo, F Arqueros, T Asch, H Asorey, P Assis, BS Atulugama, J Aublin, M Ave, G Avila, T Bäcker, D Badagnani, AF Barbosa, D Barnhill, SLC Barroso, B Baughman, P Bauleo, JJ 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 Blümer, M Bohácová, C Bonifazi, R Bonino, J Brack, P Brogueira, WC Brown, P Buchholz, A Bueno, RE Burton, NG Busca, KS Caballero-Mora, B Cai, DV Camin, L Caramete, R Caruso, W Carvalho, A Castellina, O Catalano, G Cataldi, L Cazon, R Cester, J Chauvin, A Chiavassa, JA Chinellato, A Chou, J Chudoba, J Chye, PDJ Clark, RW Clay, E Colombo, R Conceição, B Connolly, F Contreras, J Coppens, A Cordier, U Cotti, S Coutu, CE Covault, A Creusot, A Criss, J Cronin, A Curutiu, S Dagoret-Campagne, K Daumiller, BR Dawson, RM de Almeida, C De Donato, SJ de Jong, G De La Vega, WJM de Mello Junior, JRT de Mello Neto, I De Mitri, V de Souza, L Del Peral, O Deligny, A Della Selva, C Delle Fratte, H Dembinski, C Di Giulio, JC Diaz, PN Diep, C Dobrigkeit, JC D'Olivo, PN Dong, D Dornic, A Dorofeev, JC Dos Anjos, MT Dova, D D'Urso, I Dutan, MA Duvernois, R Engel, L Epele, M Erdmann, CO Escobar, A Etchegoyen, P Facal San Luis, H Falcke, G Farrar, AC Fauth, N Fazzini, F Ferrer, A Ferrero, B Fick, A Filevich, A Filipcic, I Fleck, CE Fracchiolla, W Fulgione, B García, D García Gámez, D Garcia-Pinto, X Garrido, H Geenen, G Gelmini, H Gemmeke, PL Ghia, M Giller, H Glass, MS Gold, G Golup, F Gomez Albarracin, M Gómez Berisso, P Gonçalves, M Gonçalves do Amaral, D Gonzalez, JG Gonzalez, M González, D Góra, A Gorgi, P Gouffon, V Grassi, AF Grillo, C Grunfeld, Y Guardincerri, F Guarino, GP Guedes, J Gutiérrez, JD Hague, V Halenka, JC Hamilton, P Hansen, D Harari, S Harmsma, JL Harton, A Haungs, T Hauschildt, MD Healy, T Hebbeker, G Hebrero, D Heck, C Hojvat, VC Holmes, P Homola, JR Hörandel, A Horneffer, M Hrabovský, T Huege, M Hussain, M Iarlori, A Insolia, F Ionita, A Italiano, M Kaducak, KH Kampert, T Karova, P Kasper, B Kégl, B Keilhauer, E Kemp, RM Kieckhafer, HO Klages, M Kleifges, J Kleinfeller, R Knapik, J Knapp, D-H Koang, A Krieger, O Krömer, D Kuempel, N Kunka, A Kusenko, G La Rosa, C Lachaud, BL Lago, D Lebrun, P Lebrun, J Lee, MA Leigui de Oliveira, A Letessier-Selvon, M Leuthold, I Lhenry-Yvon, R López, A Lopez Agüera, J Lozano Bahilo, A Lucero, R Luna García, MC Maccarone, C Macolino, S Maldera, G Mancarella, ME Manceñido, D Mandat, P Mantsch, AG Mariazzi, IC Maris, HR Marquez Falcon, D Martello, J Martínez, O Martínez Bravo, HJ Mathes, J Matthews, JAJ Matthews, G Matthiae, D Maurizio, PO Mazur, T McCauley, M McEwen, RR McNeil, MC Medina, G Medina-Tanco, D Melo, E Menichetti, A Menschikov, C Meurer, R Meyhandan, MI Micheletti, G Miele, W Miller, S Mollerach, M Monasor, D Monnier Ragaigne, F Montanet, B Morales, C Morello, JC Moreno, C Morris, M Mostafá, MA Muller, R Mussa, G Navarra, JL Navarro, S Navas, P Necesal, L Nellen, C Newman-Holmes, D Newton, PT Nhung, N Nierstenhoefer, D Nitz, D Nosek, L Nozka, J Oehlschläger, T Ohnuki, A Olinto, VM Olmos-Gilbaja, M Ortiz, F Ortolani, S Ostapchenko, L Otero, N Pacheco, D Pakk Selmi-Dei, M Palatka, J Pallotta, G Parente, E Parizot, S Parlati, S Pastor, M Patel, T Paul, V Pavlidou, K Payet, M Pech, J Pekala, R Pelayo, IM Pepe, L Perrone, R Pesce, S Petrera, P Petrinca, Y Petrov, A Pichel, R Piegaia, T Pierog, M Pimenta, T Pinto, V Pirronello, O Pisanti, M Platino, J Pochon, P Privitera, M Prouza, EJ Quel, J Rautenberg, A Redondo, S Reucroft, B Revenu, FAS Rezende, J Ridky, S Riggi, M Risse, C Rivière, V Rizi, M Roberts, C Robledo, G Rodriguez, J Rodriguez Martino, J Rodriguez Rojo, I Rodriguez-Cabo, MD Rodríguez-Frías, G Ros, J Rosado, M Roth, B Rouillé-d'Orfeuil, E Roulet, AC Rovero, F Salamida, H Salazar, G Salina, F Sánchez, M Santander, CE Santo, EM Santos, F Sarazin, S Sarkar, R Sato, V Scherini, H Schieler, A Schmidt, F Schmidt, T Schmidt, O Scholten, P Schovánek, F Schroeder, S Schulte, F Schüssler, SJ Sciutto, M Scuderi, A Segreto, D Semikoz, M Settimo, RC Shellard, I Sidelnik, BB Siffert, G Sigl, N Smetniansky De Grande, A Smiałkowski, R Smída, AGK Smith, BE Smith, GR Snow, P Sokolsky, P Sommers, J Sorokin, H Spinka, R Squartini, E Strazzeri, A Stutz, F Suarez, T Suomijärvi, AD Supanitsky, MS Sutherland, J Swain, Z Szadkowski, J Takahashi, A Tamashiro, A Tamburro, T Tarutina, O Taşcău, R Tcaciuc, NT Thao, D Thomas, R Ticona, J Tiffenberg, C Timmermans, W Tkaczyk, CJ Todero Peixoto, B Tomé, A Tonachini, I Torres, P Travnicek, A Tripathi, G Tristram, D Tscherniakhovski, V Tuci, M Tueros, V Tunnicliffe, R Ulrich, M Unger, M Urban, JF Valdés Galicia, I Valiño, L Valore, AM van den Berg, V van Elewyck, RA Vázquez, D Veberic, A Veiga, A Velarde, T Venters, V Verzi, M Videla, L Villaseñor, S Vorobiov, L Voyvodic, H Wahlberg, P Wahrlich, O Wainberg, P Walker, D Warner, AA Watson, S Westerhoff, G Wieczorek, L Wiencke, B Wilczyńska, H Wilczyński, C Wileman, MG Winnick, H Wu, B Wundheiler, T Yamamoto, P Younk, E Zas, D Zavrtanik, M Zavrtanik, I Zaw, A Zepeda, M Ziolkowski, Pierre Auger Collaboration

Abstract:

The energy spectrum of cosmic rays above 2.5 x 10;{18} eV, derived from 20,000 events recorded at the Pierre Auger Observatory, is described. The spectral index gamma of the particle flux, J proportional, variantE;{-gamma}, at energies between 4 x 10;{18} eV and 4 x 10;{19} eV is 2.69+/-0.02(stat)+/-0.06(syst), steepening to 4.2+/-0.4(stat)+/-0.06(syst) at higher energies. The hypothesis of a single power law is rejected with a significance greater than 6 standard deviations. The data are consistent with the prediction by Greisen and by Zatsepin and Kuz'min.
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