RICE limits on the diffuse ultrahigh energy neutrino flux

被引：189

作者：

Kravchenko, I

Cooley, C

Hussain, S

Seckel, D

Wahrlich, P

Adams, J

Churchwell, S

Harris, P

Seunarine, S

Bean, A

Besson, D

Graham, S

Holt, S

Marfatia, D

McKay, D

Meyers, J

Ralston, J ^{[1
]}

Schiel, R

Swift, H

Ledford, J

Ratzlaff, K

机构：

[1] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA

[2] Whitman Coll, Dept Phys, Walla Walla, WA 99362 USA

[3] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

[4] Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA

[5] Univ Canterbury, Dept Phys & Astron, Christchurch 1, New Zealand

[6] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA

[7] Univ Kansas, Instrumentat Design Lab, Lawrence, KS 66045 USA

来源：

PHYSICAL REVIEW D | 2006年 / 73卷 / 08期

关键词：

D O I：

10.1103/PhysRevD.73.082002

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present new limits on ultrahigh energy neutrino fluxes above 10(17) eV based on data collected by the Radio Ice Cherenkov Experiment (RICE) at the South Pole from 1999-2005. We discuss estimation of backgrounds, calibration and data analysis algorithms (both online and offline), procedures used for the dedicated neutrino search, and refinements in our Monte Carlo (MC) simulation, including recent in situ measurements of the complex ice dielectric constant. An enlarged data set and a more detailed study of hadronic showers results in a sensitivity improvement of more than 1 order of magnitude compared to our previously published results. Examination of the full RICE data set yields zero acceptable neutrino candidates, resulting in 95% confidence-level model-dependent limits on the flux E(nu)(2)d phi/dE(nu)< 10(-6) GeV/(cm(2) s sr) in the energy range 10(17)< E-nu < 10(20) eV. The new RICE results rule out the most intense flux model projections at 95% confidence level.

引用

页数：19

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