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Probing new physics by comparing solar and KamLAND data

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Probing new physics by comparing solar and KamLAND data

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dc.contributor.author De Gouvêa, André
dc.contributor.author Peña Garay, Carlos
dc.date.accessioned 2015-03-23T09:51:09Z
dc.date.available 2015-03-23T09:51:09Z
dc.date.issued 2005
dc.identifier.citation De Gouvêa, André Peña Garay, Carlos 2005 Probing new physics by comparing solar and KamLAND data Physical Review D 71 9 093002
dc.identifier.uri http://hdl.handle.net/10550/42785
dc.description.abstract We explore whether KamLAND and solar data may end up inconsistent when analyzed in terms of neutrino oscillations. If this turned out to be the case, one would be led to conclude that there is more new physics, besides neutrino masses and mixing, in the leptonic sector. On the other hand, given that KamLAND and solar data currently agree when analyzed in terms of two-flavor neutrino oscillations, one is able to place nontrivial bounds on several manifestations of new physics. In particular, we compute how well a combined KamLAND and solar data analysis is able to constrain a specific form of violation of CPT invariance by placing a very stringent upper bound on vertical bar Delta m(2)-Delta(m) over bar (2)vertical bar < 1.1 x 10(-4) eV(2) at the three sigma confidence level (m refers to neutrinos, (m) over bar to antineutrinos). We also estimate upper bounds on sin(2)theta -sin(2)(theta) over bar. These are quite poor due to the fact that matter effects are almost irrelevant at KamLAND, which leads to an intrinsic inability to distinguish whether the antineutrino mixing angle is on the light ((theta) over bar < pi/4) or dark side of the parameter space ((theta) over bar > pi/4). We briefly discuss whether this ambiguity can be resolved by future long-baseline (v) over bar (e) <-> (v) over bar (e,mu) searches.
dc.language.iso eng
dc.relation.ispartof Physical Review D, 2005, vol. 71, num. 9, p. 093002
dc.subject Física
dc.title Probing new physics by comparing solar and KamLAND data
dc.type journal article es_ES
dc.date.updated 2015-03-23T09:51:10Z
dc.identifier.doi 10.1103/PhysRevC.71.093002
dc.identifier.idgrec 097445
dc.rights.accessRights open access es_ES

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