Phenomenology 2018 Symposium

Session

Neutrinos II

15

8 May 2018, 14:00

G-28 (Benedum Hall)

590. A new theorem for lepton number conservation in seesaw models

Cedric Weiland (IPPP Durham)

08/05/2018, 14:00

parallel talk

The observation of neutrino oscillations requires an extension of the Standard Model that generates neutrino masses and mixing. The seesaw mechanism and its various realisations are among the most studied possibilities and one of their most striking phenomenological signature is lepton number violation. We will present a new theorem stating that the requiring the light neutrinos to remain...

622. Clockwork Neutrino Models

Gowri Kurup (Cornell University)

08/05/2018, 14:15

The clockwork framework can generate exponentially small couplings in theories with no input small parameters, and is especially suited to explain the hierarchically small neutrino masses. We consider the phenomenology of a discrete clockwork theory with a Dirac Standard Model neutrino (unlike in seesaw models) and N additional Dirac neutrinos. Exact diagonalisation of the mass matrix with...

557. Hybrid seesaw leptogenesis and TeV singlets (I)

Peizhi Du

08/05/2018, 14:30

parallel talk

The appealing feature of inverse seesaw models is that the Standard Model (SM) neutrino mass emerges from the exchange of TeV scale singlets with sizable Yukawa couplings, which can be tested at colliders. However, the tiny Majorana mass splitting between TeV singlets, introduced to accommodate small neutrino masses, is left unexplained. Moreover, we argue that these models suffer from a...

556. Hybrid seesaw leptogenesis and TeV singlets (II)

Majid Ekhterachian (University of Maryland College Park)

08/05/2018, 14:45

parallel talk

We propose a hybrid seesaw model that explains the smallness of Majorana mass splitting in inverse seesaw with couplings of order unity and can furthermore achieve successful leptogenesis. Our hybrid seesaw model has distinguishing features compared to the standard high scale type-I seesaw and inverse seesaw. Firstly, it has much richer phenomenology. Indeed, it predicts new TeV scale physics...

494. Left-Right Symmetry: Minimal Model and Radiative Neutrino Masses

Anil Thapa

08/05/2018, 15:00

parallel talk

We present simple left-right symmetric theory to calculate heavy Majorana neutrino masses. This model analyzes to generate neutrino masses through two-loop radiative corrections. The model propose the minimal Higgs sector composed of scalar charged singlet and two Higgs doublet instead of scalar triplet.

559. Galactic Dark Matter Population as the Source of Neutrino Masses

Matthew Sullivan (University of Kansas)

08/05/2018, 15:15

parallel talk

We propose a new mechanism for neutrino mass generation. In our model, neutrino mass is due to neutrinos coupling to a long range scalar potential, and this potential is sourced by dark matter. This leads to a neutrino mass that depends on local dark matter densities and a repulsive scalar force between neutrinos and dark matter. One prediction of this model is that relic neutrinos are mostly...

610. DUNE as the next-generation solar neutrino experiment

Guanying Zhu (The Ohio State University)

08/05/2018, 15:30

parallel talk

Important questions in solar neutrinos need to be answered. How? We propose the solar neutrino program for the next-generation neutrino experiment--DUNE. We first show the advantages of DUNE itself. Then we show that the detection backgrounds can be made low to make this program realistic. From our analysis, DUNE solar program could give the best measurement of mixing parameters and...

474. Study atmospheric neutrinos for the DSNB detection in Super-Kamiokande and SK-Gd

Bei Zhou (CCAPP, The Ohio State University)

08/05/2018, 15:45

parallel talk

Detection of the diffuse supernova neutrino background (DSNB) is of great importance, which will greatly help the understanding of both core-collapse (including supernova) physics and neutrino physics. However, after tens of years' effort of Super-Kamiokande (SK), DSNB is still hidden in the remaining backgrounds, dominated by atmospheric neutrinos.
In this work we study the underlying...