Laboratoire de Physique
Theorique d'Orsay

Accès / Find us

Bâtiment 210
Univ. Paris-Sud 11
91405 Orsay Cedex
T. 01 69 15 63 53
F. 01 69 15 82 87

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Particle Physics Seminar

Particle physics seminars generally take place Thursdays at 4 PM, in room 114, 1st floor of Building 210.

Contact : Adam Falkowski (gmail address : afalkows017)

For slides of past LPT Orsay seminars see this page

For joint P^3 seminars see that page .

Upcoming Seminars

-  Thursday, 18 October, 16:00, Shaaban Khalil (ZCST Giza)

Explaining the R_K and R_K^* Anomalies With Right-handed Sneutrino

The recent intriguing measurements of $R_K$ and $R_K^*$ are important hints of new physics that violates lepton universality. We analyze the semileptonic decays $b \to s \ell^+ \ell^-$ in the framework of the $B-L$ extension of Minimal Supersymmetric Standard Model (MSSM) with Inverse Seesaw (BLSSMIS). A salient feature of this model is that one of the right-handed sneutrino can be light and the neutrino Yukawa couplings are of order one. We show that the box diagram mediated by right-handed sneutrino, higgsino-like chargino, and light stop can account simultaneously for both $R_K$ and $R_K^*$. Therefore, while the MSSM cannot explain the $R_K$ and $R_K^*$ anomalies, the BLSSMIS can account for them, where a significant lepton flavor non-universality might stem from large neutrino Yukawa couplings.

-  Thursday, 25 October, 16:00, Camila Machado (Mainz U.)

Listening for Invisible Axions

Conventional approaches to probing axions and axion-like particles (ALPs) typically rely on a coupling to photons. If this coupling is extremely weak, ALPs are effectively decoupled from the Standard Model. However, ALPs may also couple to the dark photon of a hidden sector U(1). We show that it is possible to probe such models via chiral gravitational waves sourced by an exponential production of the dark vector shortly after the ALP begins to oscillate.

-  Tuesday, 30 October, Rahool Barman (Bangalore) TBA

-  Thursday, 8 November, Gilberto Colangelo (Bern) TBA

-  Thursday, 15 November, Claudia Garcia-Garcia (Madrid) TBA

-  Thursday, 6 December, Maira Dutra (Orsay) TBA

-  Thursday, 20 December, Luc Darmé (Warsaw) TBA