High Energy Physics Seminars next week (Farzan and Borna)

[HECAP - Margherita Di Giovannantonio]

*_HIGH ENERGY PHYSICS SEMINARS_**__*


*Tuesday, 9 July* 2024, at *16:00* - *Luigi Stasi Seminar Room **- 
*https://indico.ictp.it/event/10736/
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Yasaman Farzan (Institute for Research in Fundamental Sciences, IPM, Tehran)


*“Axial Non-Standard Interactions (NSI) of Neutrinos with Matter Field"*

_Abstract_
Vector type Non-Standard Interactions (NSI) can affect neutrino 
propagation in matter as well as the coherent elastic scattering of 
neutrinos off nuclei. In recent years, considering the ever increasing 
precision of the neutrino experiments, the vector NSI has received 
tremendous attention in the literature. However, axial NSI still 
remains  an uncharted territory. In this talk, I will first review the 
present bounds on the axial NS. I will then show how  measurements of 
neutral current events at the future DUNE experiment can improve the 
bounds. I will then present a toy model for axial NSI with sizable 
(testable) couplings.


*To join via Zoom*:

https://zoom.us/j/99960326619

Meeting ID: 999 6032 6619

Passcode: 679148



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*Thursday, 11 July* 2024, at *16:00* - *Luigi Stasi Seminar Room **- 
*https://indico.ictp.it/event/10756/
**

**

Borna Salehian (ICTP)


*“Positivity Bounds on Electromagnetic Properties of Media"*

_Abstract_
I will talk about the constraints imposed on the electromagnetic 
response of general media by microcausality (commutators of local fields 
vanish outside the light cone) and positivity of the imaginary parts 
(the medium can only absorb energy from the external field). The effect 
of the medium is encoded in the electric and magnetic permeabilities 
ε(ω, k) and μ(ω, k). In the case of dielectrics, we obtain bounds on the 
low-energy values of the response, ε(0, 0) and μ(0, 0). In particular 
the quantities ε(0, 0) − 1 and ε(0, 0) − 1/μ(0, 0) are constrained to be 
positive and equal to integrals over the imaginary parts of the response.


*To join via Zoom*:

https://zoom.us/j/96455086743

Meeting ID: 964 5508 6743

Passcode: 602968