[Theory-seminars] Theory seminar next Monday

[Astrid Hiller Blin]

Dear all,

Here is the information about next week's theory seminar:

*Theory seminar*
Monday, February 22nd, 1:00 PM

*Ian Moult *(SLAC) will talk about "Jet Substructure, Lightray Operators
and Spinning Gluons".

*Abstract:*
The detailed internal structure of jets encodes valuable information about
the interactions of high energy quarks and gluons, and their confinement
into color-neutral hadrons. Theoretically, the flow of energy within jets
is characterized by non-local lightray operators, which measure the
distribution of energy at null infinity in collider experiments. In this
talk I will first use Open Data to show that matrix elements of multiple
lightray operators can be directly measured in collider experiments,
leading to a new perspective on jet substructure. I will then show that
techniques developed in the study of conformal field theories, in
particular the lightray operator product expansion (OPE), provide powerful
approaches to understanding the small angle behavior of these observables.
Finally, I will highlight an interesting transverse spin effect that arises
due to the quantum mechanical interference of intermediate gluons of
different helicities, and imprints an azimuthal modulation pattern onto the
energy deposited in a detector.


Bluejeans connection: https://bluejeans.com/801786278
<https://urldefense.proofpoint.com/v2/url?u=https-3A__bluejeans.com_801786278&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=AIMSQQ81YDyrZuJNGks2qw&m=aT_3J5jjiFmHtFXffqbfPqEY_A73NEWw2ebyFyL_eCA&s=YNm3qgT5e8sJgKfZ9vFA_w--imuXwmeAjg0C4AslLwg&e=>

We look forward to seeing you there!
Astrid, Christos, Filippo
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