0000000001118708

AUTHOR

Lukas Graf

showing 3 related works from this author

Analysis of light neutrino exchange and short-range mechanisms in 0νββ decay

2020

Neutrinoless double beta decay (0νββ) is a crucial test for lepton number violation. Observation of this process would have fundamental implications for neutrino physics, theories beyond the Standard Model and cosmology. Focusing on so-called short-range operators of 0νββ and their potential interplay with the standard light Majorana neutrino exchange, we present the first complete calculation of the relevant nuclear matrix elements, performed within the interacting boson model (IBM-2). Furthermore, we calculate the relevant phase space factors using exact Dirac electron wave functions, taking into account the finite nuclear size and screening by the electron cloud. The obtained numerical r…

PhysicsParticle physicsSterile neutrino010308 nuclear & particles physicsPhysics beyond the Standard ModelHigh Energy Physics::PhenomenologySupersymmetry7. Clean energy01 natural sciencesLepton numberMAJORANADouble beta decay0103 physical sciencesNeutrinoInteracting boson model010306 general physicsPhysical Review
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Short-range neutrinoless double beta decay mechanisms

2018

Neutrinoless double beta decay can significantly help to shed light on the issue of non-zero neutrino mass, as observation of this lepton number violating process would imply neutrinos are Majorana particles. However, the underlying interaction does not have to be as simple as the standard neutrino mass mechanism. The entire variety of neutrinoless double beta decay mechanisms can be approached effectively. In this work we focus on a theoretical description of short-range effective contributions to neutrinoless double beta decay, which are equivalent to 9-dimensional effective operators incorporating the appropriate field content. We give a detailed derivation of the nuclear matrix elements…

Particle physicsNuclear TheoryField (physics)Physics beyond the Standard Modeldouble beta decayFOS: Physical sciencesElectron01 natural sciencesneutrinoless double beta decayNuclear Theory (nucl-th)High Energy Physics - Phenomenology (hep-ph)Double beta decay0103 physical sciences010306 general physicsPhysicsta114electroweak interaction010308 nuclear & particles physicsneutrino interactionsHigh Energy Physics::PhenomenologyForm factor (quantum field theory)3. Good healthHigh Energy Physics - PhenomenologyMAJORANAelectroweak interactions in nuclear physicsPhase spaceHigh Energy Physics::ExperimentNeutrinoPhysical Review D
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Analysis of light neutrino exchange and short-range mechanisms in 0νββ decay

2020

Neutrinoless double beta decay (0νββ) is a crucial test for lepton number violation. Observation of this process would have fundamental implications for neutrino physics, theories beyond the Standard Model and cosmology. Focusing on so-called short-range operators of 0νββ and their potential interplay with the standard light Majorana neutrino exchange, we present the first complete calculation of the relevant nuclear matrix elements, performed within the interacting boson model (IBM-2). Furthermore, we calculate the relevant phase space factors using exact Dirac electron wave functions, taking into account the finite nuclear size and screening by the electron cloud. The obtained numerical r…

electroweak interactions in nuclear physicsHigh Energy Physics::PhenomenologyHigh Energy Physics::Experimentsymmetrieshiukkasfysiikkaydinfysiikkanuclear structure and decaysneutrinoless double beta decaynuclear tests of fundamental interactions
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