[Theory-seminars] Fw: Seminars next week

[Carlota Andres Casas]

Sorry, there was a typo on the affiliation of our speaker on Wednesday.


Cake seminar:

Wednesday, February 27th, 1:00PM, Room L102

Vincent Mathieu (Jlab), "Discovering Exotic Meson with the GlueX Experiment"

BlueJeans connection: https://bluejeans.com/195615763<https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbluejeans.com%2F195615763&data=02%7C01%7C%7C95c8527a2213406ebe1a08d69903dea3%7Cb4d7ee1f4fb34f0690372b5b522042ab%7C1%7C0%7C636864639221940173&sdata=5MdjfZpUXhn1u8K78hYmZibRfKQYGJqwNUYp8oMim5k%3D&reserved=0>


________________________________
From: Theory-seminars <theory-seminars-bounces at jlab.org> on behalf of Carlota Andres Casas <carlota at jlab.org>
Sent: Friday, February 22, 2019 3:15 PM
To: theory-seminars at jlab.org
Subject: [Theory-seminars] Seminars next week


Dear all,

Here is a reminder for next week theory seminars:


Theory seminar:

Monday, February 25th, 1:00PM, Room L102

Jasmine Brewer (MIT), "Sorting out jet quenching in heavy-ion collisions"

BlueJeans connection: https://bluejeans.com/321085255

Abstract
We introduce a new "quantile'' analysis strategy to study the modification of jets as they traverse through a droplet of quark-gluon plasma. To date, most jet modification studies have been based on comparing the jet properties measured in heavy-ion collisions to a proton-proton baseline at the same reconstructed jet transverse momentum $p_T$. It is well known, however, that the quenching of jets from their interaction with the medium leads to a migration of jets from higher to lower $p_T$, making it challenging to directly infer the degree and mechanism of jet energy loss. Our proposed quantile matching procedure is inspired by (but not reliant on) the approximate monotonicity of energy loss in the jet $p_T$. In this strategy, jets in heavy-ion collisions ordered by $p_T$ are viewed as modified versions of the same number of highest-energy jets in proton-proton collisions. Despite non-monotonic fluctuations in the energy loss, we use an event generator to validate the strong correlation between the $p_T$ of the parton that initiates a heavy-ion jet and the $p_T$ of the vacuum jet which corresponds to it via the quantile procedure. We demonstrate that this strategy both provides a complementary way to study jet modification and mitigates the effect of $p_T$ migration in heavy-ion collisions.

Cake seminar:

Wednesday, February 27th, 1:00PM, Room L102

Vincent Mathieu (MIT), "Discovering Exotic Meson with the GlueX Experiment"

BlueJeans connection: https://bluejeans.com/195615763<https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbluejeans.com%2F195615763&data=02%7C01%7C%7C95c8527a2213406ebe1a08d69903dea3%7Cb4d7ee1f4fb34f0690372b5b522042ab%7C1%7C0%7C636864639221950178&sdata=hWjacxBWJle%2F2l4VINtwVbr5dIfU10FXSgsk%2FUgZt0U%3D&reserved=0>


Abstract

The eta-pi final state, whose odd partial waves have exotic quantum numbers, is one of the golden channel for hybrid meson searches. The GlueX collaboration will soon extract moments of the eta-pi0 angular distribution. In the perspective of these results, we built a model for the photoproduction of eta-pi0 with a linearly polarized beam to illustrate the influence of the P-wave in unpolarized and polarized moments. We also generalize the definition of the beam asymmetry for two mesons photoproduction and show that, when the meson momenta are perpendicular to the reaction plane, the beam asymmetry can distinguish even and odd waves. We illustrate this beam asymmetry with our model and show how it can be used to identify the presence of an exotic P wave.

Raza, Vincent, Carlota
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