1-5 July 2019
The University of Manchester
Europe/London timezone
- pascos2019@manchester.ac.uk
- +44 (0)161 275 4171
The Local Organising Committee
Parallel: Particle Physics Models of New Physics
Place
Location: Schuster
Room: Bragg Lecture Theatre
Date:
from 1 Jul 14:30 to 4 Jul 15:50
Conveners
-
1 Jul 14:30 - 16:10
- Prof. Branchina, Vincenzo (University of Catania)
-
1 Jul 16:40 - 18:20
Parallel 1
- Prof. Grzadkowski, Bohdan (University of Warsaw)
-
2 Jul 14:30 - 16:10
Parallel 1
- Prof. Shafi, Qaisar (University of delaware)
-
2 Jul 16:40 - 18:20
Parallel 1
- Prof. Evans, Nicholas (University of Southampton)
-
4 Jul 14:30 - 15:50
Parallel 1
- Kalinowski, Jan (University of Warsaw)
Timetable | Contribution List
Displaying 24
contributions
out of
24
Type: oral presentation
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
We investigate the baryon asymmetry in the supersymmetry Dine-Fischler-Srednicki-Zhitnitsky axion model without R-parity. It turns out that the R-parity violating terms economically explain the atmospheric mass-squared difference of neutrinos and the appropriate amount of baryon asymmetry through the Affleck-Dine mechanism. In this model, the axion is a promising candidate for the dark matter and
... More
Presented by Mr. Kensuke AKITA
on
02/07/2019
at
14:50
Type: oral presentation
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
We discuss how the Standard Model becomes scale invariant at the quantum level above a certain value of the Higgs field value without addition of new degrees of freedom.
We see some cosmological consequences of this setup, especially, absolute stability of the electroweak vacuum can be realized even with the current central experimental value of the top quark mass.
Presented by Dr. Kengo SHIMADA
on
01/07/2019
at
14:50
Type: oral presentation
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
I discuss asymptotically safe extensions of the Standard Model with new matter fields at the TeV scale. The BSM sector contains singlet scalars and vector-like fermions in representations which permit Yukawa interactions with the Standard Model leptons and a Higgs portal coupling. Phenomenological implications are explored including production and decay mechanisms, charged lepton flavour violation
... More
Presented by Mr. Tom STEUDTNER
on
01/07/2019
at
15:30
Type: oral presentation
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
We study the relation between the supersymmetry breaking patterns and the gauge couplings, prepotential of four-dimensional $\mathcal{N}=2$ gauged supergravity. The model contains multiple (Abelian)
vector multiplets and a single hypermultiplet which parametrizes SO$(4,1)/{\rm{SO}}(4)$ coset. We derive the expressions of two gravitino masses under the general gauging based on the embedding tensor
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Presented by Dr. Shuntaro AOKI
on
01/07/2019
at
18:00
Type: oral presentation
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
The Two Higgs Doublet Model (2HDM) is an extension of the Standard Model (SM) of particle physics in which one additional complex scalar doublet is introduced into the theory. The extension to a non-minimal Higgs sector produces several new features beyond the SM. One such feature is that the 2HDM can have non-trivial vacuum topology predicting 3 distinct domain wall solutions from the breaking of
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Presented by Mr. Dominic VIATIC
on
02/07/2019
at
14:30
Type: oral presentation
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
We study in detail simple extension of the freeze-in mechanism based on kinematically forbidden production of dark matter through plasma effects. Focusing on Higgs portal model, where the dark matter is produced via forbidden decays of a scalar coupled to the Higgs, current and future collider, cosmological, and astrophysical probes are considered.
Presented by Dimitrios KARAMITROS
on
02/07/2019
at
15:50
Type: oral presentation
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
Motivated by an alternative description of the Higgs sector, we present an non-Hermitian but PT-symmetric extension of scalar-QED. This extenion involves an imaginary mixing mass term for scalars, but keeps real energies.
Fundamental concepts of field theory must be questioned in this approach, like the derivation of the equations of motion, Noether's theorem, gauge invariance, the definition of
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Presented by Dr. Jean ALEXANDRE
on
01/07/2019
at
15:50
Type: oral presentation
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
In scale-invariant theories of gravity the Planck mass, which appears due to spontaneous symmetry breaking, can represent the only energy scale at the classical level. We discuss the possibility for the second scale, associated with the Higgs vacuum expectation value, to be generated by a quantum non-perturbative gravitational effect. The new scale can be orders of magnitude below the Planck scale
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Presented by Dr. Andrey SHKERIN
on
01/07/2019
at
15:10
Type: oral presentation
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
We study the monopole dark matter (MDM) emerging from a spontaneous breakdown of non-abelian gauge symmetry in the hidden sector. We assume that this hidden MDM was produced as a topological defect during a second-order phase transition in the early universe, and its stability is guaranteed by the topological nature. In particular, we introduce an axion-like particle (ALP), which mediates the inte
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Presented by Mr. Shu-Yu HO
on
02/07/2019
at
17:40
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
Light dark matter coupled to quarks must be treated through the effective couplings to mesons, which is implemented through the chiral lagrangian. We find the expected photon spectrum from the decay of the hadrons.
We compare to current and future observations, and show
that there is a significant discovery reach for such models of light dark matter.
Presented by Prof. Arvind RAJARAMAN
on
02/07/2019
at
17:20
Type: oral presentation
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
The possibility of a light charged Higgs boson H± that decays predominantly to quarks (cs and/or cb) and with a mass in the range 80 GeV ≤mH±≤90 GeV is studied in the context of Three-Higgs-Doublet Models (3HDMs). At present the Large Hadron Collider (LHC) has little sensitivity to this scenario, and currently the best constraints are from LEP2 and Tevatron searches. The branching ratio of H
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Presented by Mr. Muyuan SONG
on
02/07/2019
at
17:00
Type: oral presentation
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
In this talk we present the comprehensive numerical analyses and the analytic
one-loop results for the low-energy observables, $(g-2) _\mu$, $\mu \to e \gamma$, and $\mu \to e$ conversion in the Minimal R-symmetric Supersymmetric Standard Model (MRSSM).
The interplay between the three observables is investigated
as well as the parameter regions with large $(g−2) _\mu$.
A striking diffe
... More
Presented by Dr. Hyejung STOECKINGER-KIM
on
01/07/2019
at
17:20
Type: oral presentation
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
Classification of Dark Matter (DM) models is the key for the consistent exploration of DM model space and comprehensive probe of DM nature at current and future experiments. We perform systematic classification of Minimal Consistent DM (MCDM) models -- gauge invariant, renormalisable and anomaly free models -- in terms of DM and mediator weak multiplets. MCDM represents a natural building block
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Presented by Mr. Daniel LOCKE
on
02/07/2019
at
15:30
Type: oral presentation
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
Dynamic relaxation provides an interesting framework which intends to solve the hierarchy problem by postulating, that the observed value of the electroweak scale was determined dynamically in the early Universe. Values of the electroweak scale were scanned during an evolution of axion-like field (a relaxion), with a stopping mechanism responsible for fixing the scale at a small value.
The ori
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Presented by Mr. Adam MARKIEWICZ
on
04/07/2019
at
14:10
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
We consider the Maximally Symmetric Two-Higgs Doublet Model (MS-2HDM)
in which the so-called Standard Model (SM) alignment can be naturally
realised as a consequence of an accidental SO(5) symmetry in the Higgs
sector. This symmetry is broken (i) explicitly by
renormalization-group (RG) effects and (ii) softly by the bilinear
scalar mass term $m^2_{12}$. We find that in the MS-2HDM all quar
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Presented by Dr. Neda DARVISHI
on
01/07/2019
at
17:00
Type: oral presentation
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
Transition amplitudes describing dark-matter annihilation processes through a resonance may become highly inaccurate close to a production threshold if a Breit-Wigner propagator with a constant width is used. To partially overcome this problem, the BW propagator needs to be modified by including a momentum dependent decay width. However, such an approach to resonant transition amplitudes generical
... More
Presented by Mateusz DUCH
on
02/07/2019
at
15:10
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
The minimal standard model, viewed as an effective theory with spontaneously broken scale invariance, predicts light, feebly coupled dilaton. Although, the microscopic physics is almost indistinguishable from the standard model, the cosmological evolution is entirely different due to the presence of nearly flat direction in the Higgs-dilaton potential. Most notably, the electroweak phase transitio
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Presented by Prof. Archil KOBAKHIDZE
on
01/07/2019
at
14:30
Type: oral presentation
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
We propose that the $\gamma + {\not E}$ signal at the Belle-II detector will be a smoking gun for supersymmetry (SUSY) in the presence of a gauged $U(1)_{L_\mu-L_\tau}$ symmetry. A striking consequence of breaking the enhanced symmetry appearing in the limit of degenerate (s)leptons is the nondecoupling of the radiative contribution of heavy charged sleptons to the $\gamma - Z^\prime$ kinetic mixi
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Presented by Mr. Heerak BANERJEE
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
The SHiP Collaboration has proposed a general-purpose experimental facility operating in beam dump mode at the CERN SPS accelerator with the aim of searching for light, long-lived exotic particles of Hidden Sector models. The SHiP experiment incorporates a muon shield based on magnetic sweeping and two complementary apparatuses. The detector immediately downstream of the muon shield is optimised b
... More
Presented by Dr. Oliver LANTWIN
on
02/07/2019
at
16:40
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
A rather minimal possibility is that dark matter consists of the gauge bosons of a spontaneously broken symmetry. I will discuss the possibility of detecting the gravitational waves produced by the phase transition associated with such breaking. Concretely, I will focus on the scenario based on an 𝑆𝑈(2)_D group and argue that it is a case study for the sensitivity of future gravitational wav
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Presented by Mr. Camilo Alfredo GARCIA CELY
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
The Inert Doublet Model is an intriguing extension of the SM scalar sector. It is a two Higgs doublet model with a discrete Z_2 symmetry, that renders the lightest particle from the second doublet stable and therefore provides a good dark matter candidate. Current constraints on the model as well as discovery prospects at current and future searches will be discussed, with a special emphasis on fu
... More
Presented by Jan KALINOWSKI
on
01/07/2019
at
16:40
Type: oral presentation
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
The possibility of a light stop mass less then 800 GeV is conflicted with the stability of electroweak vacuum in the context of restricted models such as CMMC. In this work, we consider the most general class possible of soft super symmetry breaking terms that can be added to the MSSM. We discuss the impact of non-standard soft breaking terms on the light stop sector. We show these terms lead to l
... More
Presented by Dr. Ahmad FARZANEH KORD
on
01/07/2019
at
17:40
Type: oral presentation
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
We study a class of models in which the Standard Model (SM) is augmented by vector-like leptons:one doublet and a singlet, which are odd under an unbroken discrete Z_2 symmetry. As a result, the neutral component of these additional vector-like leptons are stable and behave as dark matter. We study the phenomenological constraints on the model parameters and elucidate the parameter space for rel
... More
Presented by Dr. Narendra SAHU
on
04/07/2019
at
13:50
Type: oral presentation
Session:
Parallel: Particle Physics Models of New Physics
Track: Particle Physics Models of New Physics
In $\mu$-hybrid inflation a nonzero inflaton vacuum expectation value induced by supersymmetry breaking is proportional to the gravitino mass $m_{3/2}$, which can be exploited to resolve the minimal supersymmetric standard model $\mu$ problem. We show how this scenario can be successfully implemented with $m_{3/2} \sim 1-100$~TeV and reheat temperature as low as $10^6$~GeV by employing a minimal r
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Presented by Ms. Fariha VARDAG
on
04/07/2019
at
14:30