Prof Subir Sarkar: Publications

IceCube

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

Constraints on large scale inhomogeneities from WMAP-5 and SDSS: confrontation with recent observations

(2008)

Authors:

Paul Hunt, Subir Sarkar

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Upper Limit on the Diffuse Flux of Ultrahigh Energy Tau Neutrinos from the Pierre Auger Observatory

Physical Review Letters 100:21 (2008)

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, 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 Boháčová, C Bonifazi, R Bonino, M Boratav, 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 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

Abstract:

The surface detector array of the Pierre Auger Observatory is sensitive to Earth-skimming tau neutrinos that interact in Earth's crust. Tau leptons from ντ charged-current interactions can emerge and decay in the atmosphere to produce a nearly horizontal shower with a significant electromagnetic component. The data collected between 1 January2004 and 31 August 2007 are used to place an upper limit on the diffuse flux of ντ at EeV energies. Assuming an Eν-2 differential energy spectrum the limit set at 90% C.L. is Eν2dNντ/dEν<1.3×10-7GeVcm-2s-1sr-1 in the energy range 2×1017eV

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Intergalactic propagation of ultrahigh energy cosmic ray nuclei: An analytic approach

Physical Review D Particles Fields Gravitation and Cosmology 77:10 (2008)

Authors:

D Hooper, S Sarkar, AM Taylor

Abstract:

It is likely that ultrahigh energy cosmic rays contain a significant component of heavy or intermediate mass nuclei. The propagation of ultrahigh energy nuclei through cosmic radiation backgrounds is more complicated than that of protons and its study has required the use of Monte Carlo techniques. We present an analytic method for calculating the spectrum and the composition at Earth of ultrahigh energy cosmic rays which start out as heavy nuclei from their extragalactic sources. The results obtained are in good agreement with those obtained using numerical methods. © 2008 The American Physical Society.

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Fine tuning and the ratio of tensor to scalar density fluctuations from cosmological inflation

(2008)

Authors:

Shaun Hotchkiss, Gabriel German, Graham G Ross, Subir Sarkar

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Erratum: Multiyear search for a diffuse flux of muon neutrinos with AMANDA-II [Phys. Rev. D 76, 042008 (2007)]

Physical Review D American Physical Society (APS) 77:8 (2008) 089904

Authors:

A Achterberg, M Ackermann, J Adams, J Ahrens, K Andeen, J Auffenberg, X Bai, B Baret, SW Barwick, R Bay, K Beattie, T Becka, JK Becker, K-H Becker, P Berghaus, D Berley, E Bernardini, D Bertrand, DZ Besson, E Blaufuss, DJ Boersma, C Bohm, J Bolmont, S Böser, O Botner, A Bouchta, J Braun, T Burgess, T Castermans, D Chirkin, B Christy, J Clem, DF Cowen, MV D’Agostino, A Davour, CT Day, C De Clercq, L Demirörs, F Descamps, P Desiati, T DeYoung, JC Diaz-Velez, J Dreyer, JP Dumm, MR Duvoort, WR Edwards, R Ehrlich, J Eisch, RW Ellsworth, PA Evenson, O Fadiran, AR Fazely, K Filimonov, C Finley, MM Foerster, BD Fox, A Franckowiak, R Franke, TK Gaisser, J Gallagher, R Ganugapati, H Geenen, L Gerhardt, A Goldschmidt, JA Goodman, R Gozzini, T Griesel, A Groß, S Grullon, RM Gunasingha, M Gurtner, C Ha, A Hallgren, F Halzen, K Han, K Hanson, D Hardtke, R Hardtke, JE Hart, Y Hasegawa, T Hauschildt, D Hays, J Heise, K Helbing, M Hellwig, P Herquet, GC Hill, J Hodges, KD Hoffman, B Hommez, K Hoshina, D Hubert, B Hughey, J-P Hülß, PO Hulth, K Hultqvist, S Hundertmark, M Inaba, A Ishihara, J Jacobsen, GS Japaridze, H Johansson, A Jones, JM Joseph, K-H Kampert, A Kappes, T Karg, A Karle, H Kawai, JL Kelley, F Kislat, N Kitamura, SR Klein, S Klepser, G Kohnen, H Kolanoski, L Köpke, M Kowalski, T Kowarik, M Krasberg, K Kuehn, M Labare, H Landsman, R Lauer, H Leich, D Leier, I Liubarsky, J Lundberg, J Lünemann, J Madsen, R Maruyama, K Mase, HS Matis, T McCauley, CP McParland, A Meli, T Messarius, P Mészáros, H Miyamoto, A Mokhtarani, T Montaruli, A Morey, R Morse, SM Movit, K Münich, R Nahnhauer, JW Nam, P Nießen, DR Nygren, H Ögelman, A Olivas, S Patton, C Peña-Garay, C Pérez de los Heros, A Piegsa, D Pieloth, AC Pohl, R Porrata, J Pretz, PB Price, GT Przybylski, K Rawlins, S Razzaque, E Resconi, W Rhode, M Ribordy, A Rizzo, S Robbins, P Roth, F Rothmaier, C Rott, D Rutledge, D Ryckbosch, H-G Sander, S Sarkar, K Satalecka, S Schlenstedt, T Schmidt, D Schneider, D Seckel, B Semburg, SH Seo, Y Sestayo, S Seunarine, A Silvestri, AJ Smith, M Solarz, C Song, JE Sopher, GM Spiczak, C Spiering, M Stamatikos, T Stanev, T Stezelberger, RG Stokstad, MC Stoufer, S Stoyanov, EA Strahler, T Straszheim, K-H Sulanke, GW Sullivan, TJ Sumner, I Taboada, O Tarasova, A Tepe, L Thollander, S Tilav, M Tluczykont, PA Toale, D Tosi, D Turčan, N van Eijndhoven, J Vandenbroucke, A Van Overloop, V Viscomi, B Voigt, W Wagner, C Walck, H Waldmann, M Walter, Y-R Wang, C Wendt, CH Wiebusch, C Wiedemann, G Wikström, DR Williams, R Wischnewski, H Wissing, K Woschnagg, XW Xu, G Yodh, S Yoshida, JD Zornoza

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Prof Subir Sarkar

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IceCube

IceCube at Oxford

Constraints on large scale inhomogeneities from WMAP-5 and SDSS: confrontation with recent observations

Authors:

Upper Limit on the Diffuse Flux of Ultrahigh Energy Tau Neutrinos from the Pierre Auger Observatory

Authors:

Abstract:

Intergalactic propagation of ultrahigh energy cosmic ray nuclei: An analytic approach

Authors:

Abstract:

Fine tuning and the ratio of tensor to scalar density fluctuations from cosmological inflation

Authors:

Erratum: Multiyear search for a diffuse flux of muon neutrinos with AMANDA-II [Phys. Rev. D 76, 042008 (2007)]

Authors:

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Prof Subir Sarkar

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Sub department

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IceCube

IceCube at Oxford

Constraints on large scale inhomogeneities from WMAP-5 and SDSS: confrontation with recent observations

Authors:

Upper Limit on the Diffuse Flux of Ultrahigh Energy Tau Neutrinos from the Pierre Auger Observatory

Authors:

Abstract:

Intergalactic propagation of ultrahigh energy cosmic ray nuclei: An analytic approach

Authors:

Abstract:

Fine tuning and the ratio of tensor to scalar density fluctuations from cosmological inflation

Authors:

Erratum: Multiyear search for a diffuse flux of muon neutrinos with AMANDA-II [Phys. Rev. D 76, 042008 (2007)]

Authors: