High Energy seminars are usually held on Tuesdays at 4:30 p.m. in the Luigi Stasi Seminar Room (1st floor) and on Thursdays at 4:30 p.m. in the Euler Lecture Hall (Lower level '0').
Informal seminars may also take place on Mondays and Fridays in the Euler Lecture Hall.
String Seminars in Trieste is a monthly activity organized jointly by the High Energy Physics groups of ICTP and SISSA. Each event consists of two seminars given by two external speakers. The aim is to gather all theoretical physicists working in string theory and related topics in the Trieste area, and have the opportunity to get updated on what's going on in our field world-wide. The seminars take place either at ICTP or SISSA, alternately. Link to the Webpage for more information and future activities.
All seminars are announced on the High Energy board (2nd floor, near the High Energy Secretariat).
Also check the announcements on ICTP notice boards regularly.
The mail list for our ICTP seminars is he-sem@lists.ictp.it
If you are interested in subscribing to the SISSA mailing lists, you should follow the instructions on the high-energy mailing list seminars or all the mailing lists.
Europe/Rome
2017-06-27 16:30:00
2017-06-27 18:00:00
Non-Gaussianity as a Particle Detector
Abstract. Cosmological correlation functions encode the spectrum of particles during inflation, in analogy to scattering amplitudes in colliders. In this talk, I will discuss the imprints of massive particles with arbitrary spin on cosmological correlators. The spinning case is particularly interesting because the detection of massive higher-spin particles would be indicative of a stringy origin of inflation. I will describe their key spectroscopic features in the scalar and tensor bispectra, and discuss scenarios in which they lead to observable non-Gaussianity.
ICTP
ICTP
pio@ictp.it
Room: Leonardo Building - Luigi Stasi Seminar Room
Speaker(s): Hayden LEE (University of Cambridge, UK)
Seminar Start Time: 16:30
Europe/Rome
2017-07-11 16:30:00
2017-07-11 18:00:00
Anomaly-induced effective action of gravity and its most important applications
Abstract. The effective action of gravity is supposed to contains the main information about quantum corrections to gravity. However, in many cases it can not be calculated exactly. A remarkable and important exception is the effective action of vacuum for massless and conformal-invariant matter fields. In this case the effective action can be easily derived by integrating trace anomaly. The integration constant is an unknown conformal functional of the background metric, but for zero-order cosmology this functional is irrelevant and the solution becomes exact. Until recently the integrated anomaly was known only in dimensions d=2 and d=4, but recently we achieved the explicit result for d=6, which confirms the universal functional structure of the effective action. The most important applications in d=4 include systematic classification of vacuum states in the vicinity of the black hole and the Starobinsky model of inflation. In the seminar I will give a non-technical introduction to the subject and also discuss the recent works on the transition from stable to unstable (Starobinsky model) branches of anomaly-induced inflation.
ICTP
ICTP
pio@ictp.it
Room: Leonardo Building - Luigi Stasi Seminar Room
Speaker(s): Ilya SHAPIRO (Universidade Federal de Juiz de Fora, Brazil)
Seminar Start Time: 16:30
Europe/Rome
2017-07-13 16:30:00
2017-07-13 18:00:00
To be announced
ICTP
ICTP
pio@ictp.it
Room: Leonardo Building - Euler Lecture Hall
Speaker(s): Aseem PARANJAPE (IUCAA, Pune, India)
Seminar Start Time: 16:30
Europe/Rome
2017-07-20 16:30:00
2017-07-20 18:00:00
A taste of flavor in string compactifications
Abstract. The phenomenological models based on compactifications of the heterotic string are endowed with several symmetries, among which there are non-Abelian discrete groups that may be interpreted as flavor symmetries. Delta(54) is the largest discrete subgroup of SU(3) that may explain the number of generations in particle physics. In this talk, we discuss how orbifold compactifications generate naturally this symmetry and impose constraints that result in phenomenological simplifications. The consequences for flavor physics, besides adequate masses for quarks and leptons, include normal hierarchy and experimentally-favored values for mixing angles in the neutrino sector.
ICTP
ICTP
pio@ictp.it
Room: Leonardo Building - Euler Lecture Hall
Speaker(s): Saul RAMOS SANCHEZ (UNAM, Mexico)
Seminar Start Time: 16:30
Europe/Rome
2017-09-12 16:30:00
2017-09-12 18:00:00
To be announced
ICTP
ICTP
pio@ictp.it
Room: Leonardo Building - Luigi Stasi Seminar Room
Speaker(s): Sayantani BERA (TIFR, Mumbai, India)
Seminar Start Time: 16:30
Europe/Rome
2017-09-14 16:30:00
2017-09-14 18:00:00
To be announced
ICTP
ICTP
pio@ictp.it
Room: Leonardo Building - Luigi Stasi Seminar Room
Speaker(s): Shreya BANERJEE (TIFR, Mumbai, India)
--- Please note unusual venue!! ---
Seminar Start Time: 16:30
