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Probing neutrino oscillation parameters using high power superbeam from ESS
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Theoretical Particle Physics. Harish-Chandra Research Institute, India .ORCID iD: 0000-0002-6071-8546
2014 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 12, 020- p.Article in journal (Refereed) Published
Abstract [en]

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).

Place, publisher, year, edition, pages
2014. no 12, 020- p.
Keyword [en]
Neutrino Physics, Beyond Standard Model
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-158437DOI: 10.1007/JHEP12(2014)020ISI: 000346000600001Scopus ID: 2-s2.0-84916624604OAI: oai:DiVA.org:kth-158437DiVA: diva2:777459
Funder
EU, FP7, Seventh Framework Programme, PITN-GA-2011-289442
Note

QC 20150108

Available from: 2015-01-08 Created: 2015-01-08 Last updated: 2017-12-05Bibliographically approved

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Choubey, Sandhya

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