Probing neutrino oscillation parameters using high power superbeam from ESS

被引：27
作者：
Agarwalla, Sanjib Kumar [1 ]
Choubey, Sandhya [2 ,3 ]
Prakash, Suprabh [2 ]
机构：
[1] Inst Phys, Bhubaneswar 751005, Orissa, India
[2] Harish Chandra Res Inst, Allahabad 211019, Uttar Pradesh, India
[3] KTH Royal Inst Technol, AlbaNova Univ Ctr, Sch Engn Sci, Dept Theoret Phys, S-10691 Stockholm, Sweden
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2014年 / 12期
关键词：
Neutrino Physics; Beyond Standard Model; ATMOSPHERIC NEUTRINOS; SOLAR; SIMULATION; THETA(23); RESONANCE;
D O I：
10.1007/JHEP12(2014)020
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
A high-power neutrino superbeam experiment at the ESS facility has been proposed such that the source-detector distance falls at the second oscillation maximum, giving very good sensitivity towards establishing CP violation. In this work, we explore the comparative physics reach of the experiment in terms of leptonic CP-violation, precision on atmospheric parameters, non-maximal theta(23), and its octant for a variety of choices for the baselines. We also vary the neutrino vs. the anti-neutrino running time for the beam, and study its impact on the physics goals of the experiment. We find that for the determination of CP violation, 540 km baseline with 7 years of nu and 3 years of (v) over bar (7v + 3 (v) over bar) run-plan performs the best and one expects a 5 sigma sensitivity to CP violation for 48% of true values of delta (CP). The projected reach for the 200 km baseline with 7v + 3 (v) over bar run-plan is somewhat worse with 5 sigma sensitivity for 34% of true values of delta(CP). On the other hand, for the discovery of a non-maximal theta(23) and its octant, the 200 km baseline option with run-plan performs significantly better than the other baselines. A 5 sigma determination of a non-maximal theta(23) can be made if the true value of sin(2) theta(23) less than or similar to 0.45 or sin(2) theta(23) greater than or similar to 0.57. The octant of theta(23) could be resolved at 5 sigma if the true value of sin(2) theta(23) less than or similar to 0.43 or greater than or similar to 0.59, irrespective of delta(CP).
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页数：25
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