Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Matheus, Ricardo D."'
It is a common feature of vector-like extensions of the electroweak sector to have near degenerate states, such as electroweak doublets. In simplified models, it is usually assumed that these have decay widths saturated by two-body channels. As a con
Externí odkaz:
http://arxiv.org/abs/2303.09022
Autor:
Bautista, Carlos, de Lima, Leonardo, Matheus, Ricardo D., Pontón, Eduardo, Prado, Leônidas A. F. do, Savoy-Navarro, Aurore
We study the production of $t{\bar t}h$ and $t{\bar t}hh$ at hadron colliders, in the minimal Composite Higgs Models, based on the coset $SO(5)/SO(4)$. We explore the fermionic representations ${\bf 5}$ and ${\bf 14}$. A detailed phenomenological ana
Externí odkaz:
http://arxiv.org/abs/2008.13026
Two Higgs Doublet Models (2HDM) are popular extensions of the Standard Model for several reasons, but do not explain neutrino masses. In this work, we investigate how one can incorporate neutrino masses within the framework of the 2HDM-U(1), where U(
Externí odkaz:
http://arxiv.org/abs/1904.07883
Publikováno v:
Phys. Rev. D 94, 015010 (2016)
Relaxion models are an interesting new avenue to explain the radiative stability of the Standard Model scalar sector. They require very large field excursions, which are difficult to generate in a consistent UV completion and to reconcile with the co
Externí odkaz:
http://arxiv.org/abs/1601.07183
We consider the Higgs Lepton Flavor Violating process $h \rightarrow \tau \mu$, in which CMS found a $2.5 \sigma$ excess of events, from a model independent perspective, and find that it is difficult to generate this operator without also obtaining a
Externí odkaz:
http://arxiv.org/abs/1501.06923
Publikováno v:
Phys. Rev. D 89, 074027 (2014)
In this paper we extend the well known QCD sum rules used in the calculation of the mass of heavy mesons to estimate the modification of the charged B meson mass, m_B, in the presence of an external Abelian magnetic field, eB. Two simplifying limits
Externí odkaz:
http://arxiv.org/abs/1307.1797
Publikováno v:
Phys.Rev.D83:035012,2011
We examine the possibility that a new strong interaction is accessible to the Tevatron and the LHC. In an effective theory approach, we consider a scenario with a new color-octet interaction with strong couplings to the top quark, as well as the pres
Externí odkaz:
http://arxiv.org/abs/1011.6380
Publikováno v:
Phys.Rev.D82:055015,2010
In extensions of the standard model with a heavy fourth generation one important question is what makes the fourth-generation lepton sector, particularly the neutrinos, so different from the lighter three generations. We study this question in the co
Externí odkaz:
http://arxiv.org/abs/0912.5219
Autor:
Matheus, Ricardo D., Narison, Stephan
Publikováno v:
Nucl.Phys.Proc.Suppl.152:236-241,2006
We rewiew and scrutinize the existing mass determinations of the pentaquarks from the exponential Laplace Sum Rules (LSR). We do not find any sum rule window for extracting optimal and reliable results from the LSR, due to the unusual slow convergenc
Externí odkaz:
http://arxiv.org/abs/hep-ph/0412063
Relaxion models are an interesting new avenue to explain the radiative stability of the Standard Model scalar sector. They require very large field excursions, which are difficult to generate in a consistent UV completion and to reconcile with the co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od________65::205da5cefa1517e0d1b6fded7a5b6353
http://cds.cern.ch/record/2127220
http://cds.cern.ch/record/2127220