Zobrazeno 1 - 10
of 184
pro vyhledávání: '"Apostolos Pilaftsis"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 5, Pp 1-34 (2024)
Abstract The Two-Higgs Doublet Model (2HDM) is a well-motivated theoretical framework that provides additional sources of CP Violation (CPV) beyond the Standard Model (SM). After studying the vacuum topology of a general (convex) 2HDM potential, we u
Externí odkaz:
https://doaj.org/article/edfa6e5bd2aa45af92c3b086d94deb9f
Autor:
Viola Gattus, Apostolos Pilaftsis
Publikováno v:
Physics Letters B, Vol 846, Iss , Pp 138234- (2023)
We formulate minimal SuperGeometric Quantum Field Theories (SG-QFTs) that allow for scalar-fermion field transformations in a manifestly reparameterisation covariant manner. First, we discuss the issue of uniqueness in defining the field-space superm
Externí odkaz:
https://doaj.org/article/fa3a588cf1a0459b88aeb64a11160e96
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 7, Pp 1-15 (2021)
Abstract We present a frame- and reparametrisation-invariant formalism for quantum field theories that include fermionic degrees of freedom. We achieve this using methods of field-space covariance and the Vilkovisky–DeWitt (VDW) effective action. W
Externí odkaz:
https://doaj.org/article/45e395d20c0143c19f4236b72f63bfab
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 1, Pp 1-45 (2021)
Abstract The Two Higgs Doublet Model predicts the emergence of 3 distinct domain wall solutions arising from the breaking of 3 accidental global symmetries, Z 2, CP1 and CP2, at the electroweak scale for specific choices of the model parameters. We p
Externí odkaz:
https://doaj.org/article/531af103554b4c788b5508254a0b6c06
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 2, Pp 1-28 (2019)
Abstract In spontaneously broken gauge theories, transition amplitudes describing dark-matter (DM) annihilation processes through a resonance may become highly inaccurate close to a production threshold, if a Breit-Wigner (BW) ansatz with a constant
Externí odkaz:
https://doaj.org/article/4a68d05942fd4788b679aecec3b68c07
Publikováno v:
Nuclear Physics B, Vol 960, Iss , Pp 115171- (2020)
We construct accidentally symmetric potentials in the framework of Two Higgs Model Effective Field Theory (2HDMEFT) including higher-order operators of dimension 6 and dimension 8. Our construction is facilitated by an earlier developed technique bas
Externí odkaz:
https://doaj.org/article/f61951d5695c4721ac835708e3e57a11
Autor:
Mulham Hijazi, Apostolos Pilaftsis
Publikováno v:
Nuclear Physics B, Vol 956, Iss , Pp 115034- (2020)
We study the effects of Goldstone modes on the stability of the vacuum in a U(1) theory for a complex scalar field. The dynamics of the field resemble those of Keplerian motion in the presence of time-dependent friction, whose equations of motion imp
Externí odkaz:
https://doaj.org/article/8302d8ad285247aba28b275f06676a94
Publikováno v:
Nuclear Physics B, Vol 927, Iss , Pp 219-254 (2018)
We introduce a frame-covariant formalism for inflation of scalar-curvature theories by adopting a differential geometric approach which treats the scalar fields as coordinates living on a field-space manifold. This ensures that our description of inf
Externí odkaz:
https://doaj.org/article/7d1926d66e4a434ea10979e8c5bfd0ad
Autor:
Apostolos Pilaftsis, Daniele Teresi
Publikováno v:
Nuclear Physics B, Vol 920, Iss C, Pp 298-318 (2017)
The Symmetry Improved Two-Particle-Irreducible (SI2PI) formalism is a powerful tool to calculate the effective potential beyond perturbation theory, whereby infinite sets of selective loop-graph topologies can be resummed in a systematic and consiste
Externí odkaz:
https://doaj.org/article/f0f3a36abc224e4393f7aadc9b60e792
Autor:
Abdelhak Djouadi, Apostolos Pilaftsis
Publikováno v:
Physics Letters B, Vol 765, Iss C, Pp 175-180 (2017)
We propose a simple mechanism for copiously producing heavy Higgs bosons with enhanced decay rates to two photons at the LHC, within the context of the Minimal Supersymmetric extension of the Standard Model (MSSM). In the CP-conserving limit of the t
Externí odkaz:
https://doaj.org/article/6edbf2dc3ae141cba5ccd1bd2e992488