High Energy Physics News & Events

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TeV-scale gravity at the LHC, and the way forward in an era lacking significant excesses

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Speaker
Elena Villhauer (U. C. Irvine ATLAS, CERN)
Event date
Venue
GAP room
Event type
Abstract: The hierarchy problem and the irreconcilability of quantum mechanics and general relativity are two of the most frustrating problems that the Standard Model fails to solve. The existence of extra dimensions, however, would provide the much awaited solutions. If extra dimensions exist and push the Planck scale down to the TeV range, signatures of extra dimensions could be found at the Large Hadron Collider in Geneva, Switzerland. Results of TeV-scale gravity searches with the ATLAS and CMS detectors at 13 TeV are summarized, and outlook is provided on the best way forward in the absence of discoveries.

On the way towards a phenomenologically consistent GUT

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Speaker
Roman Pasechnik (THEP - Lund U.)
Event date
Venue
GAP room
Event type

Abstract: A new E8-inspired SUSY GUT theory unifying gauge and Yukawa interactions via unification of color, left-right and family symmetries will be presented. The prominent phenomenological potential of this model in predicting the fermion mass/mixing spectra will be discussed.

 

Shaping the fermion sector with CP symmetry of order 4

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Speaker
Igor Ivanov (CFTP - IST)
Event date
Venue
GAP room
Event type

Abstract: It is well known that discrete symmetries such as CP are not uniquely defined in quantum field theory, and a certain freedom of their definition exists. In particular, the CP transformation can be of order 4, not 2, and still lead to acceptable phenomenology.

From Infinitely Large to Infinitely Small

Gr@v member António P. Morais gave a talk at Escola Secundária José Régio in Vila do Conde with title "Do Infinitamente Grande ao Infinitamente Pequeno - uma jornada pelas interações fundamentais na natureza". António was an invited speaker to participate in a sequence of seminars entitled "A Biblioteca convida...", and presented to 11th and 12th grade Science and Technology students the four fundamental interactions in nature and how have they shaped our Universe.

Chiral Magnetohydrodynamic Turbulence

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Speaker
Natacha Leite (DESY, U. Hamburg)
Event date
Venue
GAP room
Event type
Abstract: I will present the influence of the chiral anomaly on the evolution of magnetohydrodynamics. In the early universe, before electroweak symmetry breaking, and in systems at high enough temperatures such that the electron mass can be ignored, the general description of a charged plasma needs to take into account the triangle anomaly. The interplay between turbulence and chiral magnetic effect can have important consequences on the evolution of magnetic fields, leading to the creation of maximally-helical fields from initially non-helical ones. Chiral effects can support a turbulent inverse cascade, causing a slower decrease of magnetic field with time and a faster growth of correlation length, when compared to the evolution predicted by the standard magnetohydrodynamical description. Using the weak anomaly approximation, specific solutions for the inverse cascade regime that show how chiral effects support it are derived.