Magical properties of a 2540 km baseline superbeam experiment

被引：18

作者：

Raut, Sushant K. ^{[1
]}

Singh, Ravi Shanker ^{[1
,2
]}

Sankar, S. Uma ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India

[2] Brown Univ, Dept Phys, Providence, RI 02912 USA

来源：

PHYSICS LETTERS B | 2011年 / 696卷 / 03期

关键词：

Neutrino mass hierarchy; Long baseline experiments; NEUTRINO OSCILLATION;

D O I：

10.1016/j.physletb.2010.12.029

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Lack of any information on the CP violating phase delta(CP) weakens our ability to determine neutrino mass hierarchy. Magic baseline of 7500 km was proposed to overcome this problem. However, to obtain large enough fluxes, at this very long baseline, one needs new techniques of generating high intensity neutrino beams. In this Letter, we highlight the magical properties of a 2540 km baseline. At such a baseline, using a narrow band neutrino superbeam whose no oscillation event rate peaks around the energy 3.5 GeV, we can determine neutrino mass hierarchy independently of the CP phase. For sin(2) 2 theta(13) >= 0.05, a very modest exposure of 10 Kiloton-years is sufficient to determine the hierarchy. For 0.02 <= sin(2) 2 theta(13) <= 0.05, an exposure of about 100 Kiloton-years is needed. (C) 2010 Elsevier By. All rights reserved.

引用

页码：227 / 231

页数：5

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