Thursday, May 27, 2021, 1:00 pm — Videoconference / Virtual Event (see link below)
Abstract: The ultra-peripheral collisions of relativistic heavy-ion beams lead to a preva-
lent and diverse set of photon-nucleus interactions. Measurements of particles
produced in photonuclear collisions and their interactions can shed light on
the QCD dynamics of EM-induced, extremely asymmetric colliding systems,
with energies between those available at RHIC and the LHC. In addition, un-
derstanding the hadronic
uctuation spectrum of the photon in this fashion is
critical for maximizing the precision of measurements at the future Electron Ion
Collider facility. This talk presents a measurement of two-particle long-range
azimuthal correlations in photonuclear collisions using 5.02 TeV Pb+Pb col-
lision data. Candidate photonuclear events are selected using a combination
of single-sided zero-degree calorimeter activity and reconstructed pseudorapid-
ity gaps. Correlation functions are constructed and non-collective contributions
are removed. The resulting elliptic and triangular
ow coecients are presented
where signi cant non-zero values are observed and compared to proton{proton
and proton{lead collisions in similar multiplicity ranges.
The results in this highly-asymmetric system could be sensitive the longi-
tudinal structure of the initial state (i.e. event-plane twist) of which little has
been explored in small systems. This talk will also present the prospect for
understanding the relevant sub-nucleonic structure leading to small-system lon-
gitudinal decorrelation and how it relates to previous studies in large systems.
Hosted by: Takao Sakaguchi
Join Videoconference More Information
16481 | INT/EXT | Events Calendar
Not all computers/devices will add this event to your calendar automatically.
A calendar event file named "calendar.ics" will be placed in your downloads location. Depending on how your device/computer is configured, you may have to locate this file and double click on it to add the event to your calendar.
Event dates, times, and locations are subject to change. Event details will not be updated automatically once you add this event to your own calendar. Check the Lab's Events Calendar to ensure that you have the latest event information.