New Submission
ORAL
Abstract
Title:
Annihilation of NMSSM Neutralinos and Branching Ratios of Lightest CP-even and CP-odd Higgs Bosons
Author:
Dr. Gayatri Ghosh
Abstract:
The next−to−minimal supersymmetric standard model (NMSSM) featuring constrained
mSUGRA model, has the capability to inherently anticipate a light dark matter component within
the existing limitations encompassing Higgs data, sparticle−mass constraints, dark matter explo-
ration, muon g-2. We examine neutralino dark matter within the NMSSM framework by conducting
a comprehensive analysis of its parameter space. This involves evaluating neutralino capture and
annihilation rates within the Sun. The exploration of potential detection strategies for neutralino
dark matter in neutrino experiments hinges on the composition of neutralinos and their primary
annihilation pathways. Our study also involves reassessing the maximum thresholds for branching
ratios of lepton flavour violation decays BR(µ → e + γ), BR(τ → e + γ) by directly referencing the
constrained limits on ∆a_µ from g_µ − 2 experiment. This work also presents constraints of muon
flux, photon, positron and antiproton flux, specifically its independence from experimental intricacies and the universal applicability of recalculation coefficients across NMSSM model. In this work,
we delve into the intricate calculations of muon flux resulting from the annihilation of dark matter,
examining various sources including the cores of celestial bodies like the Sun and Earth, as well as
cosmic diffuse neutrinos generated in dark matter annihilation within halos. A significant finding
of our investigation lies in the distinct energy distribution of muons stemming from dark matter
annihilation, contrasting sharply with those produced by atmospheric neutrinos. Furthermore, we
meticulously consider the two scenarios of muon flux: upward flux, originating from muons created
in the substratum beneath the detector, and contained flux, where muons are generated within the
detector material itself. Additionally, we discuss the implications of neutrino flavor dependence and
its ramifications for detection methodologies, providing valuable insights into the nuanced interplay
between dark matter annihilation and neutrino observation. We also calculate the Branching Ratios,
Particle Decay Channel of lightest CP odd, even Higgs in NMSSM. Within the scope of this research,
we have chosen to utilize this NMSSM scenario as a case study to investigate the funnel− annihila-
tion mechanisms pertaining to light dark matter and the concealed Higgs decay. In this particular
scenario, our findings reveal that there exist decay channel−annihilation mechanisms for the lightest supersymmetric particle ˜χ^1_0
, which include the h2, h1, Z, W+, W−, G, s, S, b, B, c, C, a, A, d, D, l,L decay funnels
Annihilation of NMSSM Neutralinos and Branching Ratios of Lightest CP-even and CP-odd Higgs Bosons
Author:
Dr. Gayatri Ghosh
Abstract:
The next−to−minimal supersymmetric standard model (NMSSM) featuring constrained
mSUGRA model, has the capability to inherently anticipate a light dark matter component within
the existing limitations encompassing Higgs data, sparticle−mass constraints, dark matter explo-
ration, muon g-2. We examine neutralino dark matter within the NMSSM framework by conducting
a comprehensive analysis of its parameter space. This involves evaluating neutralino capture and
annihilation rates within the Sun. The exploration of potential detection strategies for neutralino
dark matter in neutrino experiments hinges on the composition of neutralinos and their primary
annihilation pathways. Our study also involves reassessing the maximum thresholds for branching
ratios of lepton flavour violation decays BR(µ → e + γ), BR(τ → e + γ) by directly referencing the
constrained limits on ∆a_µ from g_µ − 2 experiment. This work also presents constraints of muon
flux, photon, positron and antiproton flux, specifically its independence from experimental intricacies and the universal applicability of recalculation coefficients across NMSSM model. In this work,
we delve into the intricate calculations of muon flux resulting from the annihilation of dark matter,
examining various sources including the cores of celestial bodies like the Sun and Earth, as well as
cosmic diffuse neutrinos generated in dark matter annihilation within halos. A significant finding
of our investigation lies in the distinct energy distribution of muons stemming from dark matter
annihilation, contrasting sharply with those produced by atmospheric neutrinos. Furthermore, we
meticulously consider the two scenarios of muon flux: upward flux, originating from muons created
in the substratum beneath the detector, and contained flux, where muons are generated within the
detector material itself. Additionally, we discuss the implications of neutrino flavor dependence and
its ramifications for detection methodologies, providing valuable insights into the nuanced interplay
between dark matter annihilation and neutrino observation. We also calculate the Branching Ratios,
Particle Decay Channel of lightest CP odd, even Higgs in NMSSM. Within the scope of this research,
we have chosen to utilize this NMSSM scenario as a case study to investigate the funnel− annihila-
tion mechanisms pertaining to light dark matter and the concealed Higgs decay. In this particular
scenario, our findings reveal that there exist decay channel−annihilation mechanisms for the lightest supersymmetric particle ˜χ^1_0
, which include the h2, h1, Z, W+, W−, G, s, S, b, B, c, C, a, A, d, D, l,L decay funnels
*UGC, RUSA, India
–
Presenters
-
Gayatri Ghosh
- Gauhati University