# Blogi Blogi

Dear All,

We would like to invite you to the lecture on The physics of the QCD energy-momentum tensor

The lecture will be on Monday, 30th May at 2pm:

https://events.ncbj.gov.pl/event/137/

Speaker:   Cédric Lorcé (CPHT, École Polytechnique, Palaiseau, France)

Title: The physics of the QCD energy-momentum tensor (1/2)

https://www.gotomeet.me/NCBJmeetings/electron-ion-collider

Best Regards,

Krzysztof Kutak, Jakub Wagner, Agnieszka Łuszczak (on behalf of the representatives, https://eicpl.ifj.edu.pl)

## Zapraszamy na seminarium 24.05.2022

Dear All,

we have the pleasure to invite you to the Particle Theory Seminar on Tuesday,

May 31 at 15:15, which will be given by

Joao Barata (Brookhaven National Laboratory)

entitled

“Jet quenching in a digital quantum computer”

Abstract: The fast development of quantum technologies over the last decades has offered a glimpse to a future where the quantum properties of multi-particle systems might be more fully understood. So far, quantum computing has seen ample application in areas such as quantum chemistry or condensed matter, but its usage in high-energy physics is still in its infancy. In the particular case of QCD jets, these technologies might offer a way to more fully understand the intricate interference pattern arising from the multi-parton cascade.  In this talk, I will discuss an approach to study the evolution of jets in the presence of a background field. I will consider single parton evolution, neglecting radiative energy loss and focusing on momentum diffusion. Using the typical approximations found in jet quenching literature, this problem is easily solved and thus it offers a good first step towards studying full jets. Besides the formulation of the problem in terms of operations on the quantum computer, I will also show some early numerical results using qiskit.

The seminar will be in a hybrid mode, local people are invited to meet in the seminar room D-2-02.

Piotr Korcyl, Jacek Wosiek, Michał Praszałowicz

## Zapraszamy na seminarium 24.05.2022

Dear All,

we have the pleasure to invite you to the Particle Theory Seminar on Tuesday,

May 24 at 12:15, which will be given by

Sebastian Sapeta (IFJ PAN)

entitled

Triple-collinear one-loop splitting functions in QCD

The seminar will be in a hybrid mode, local people are invited to meet in the seminar room D-2-02.

Piotr Korcyl, Jacek Wosiek, Michał Praszałowicz

Dear All,

We would like to invite you to the lecture on Diffraction in hadronic collisions

The lecture will be on Monday, 16th May at 2pm:

https://events.ncbj.gov.pl/event/137/

Speaker:  Anna Staśto (Penn State University, USA)

Title: Diffraction in hadronic collisions (1/2)

## Zapraszamy na seminarium 18.05.2022

Dear All,

we have the pleasure to invite you to the Particle Theory Seminar on WEDNESDAY,

May 18 at 12:15, which will be given by

Prof. Michał Spaliński (NCBJ)

entitled

“Hydrodynamic Attractors and Quark-Gluon Plasma”

Abstract: The successful application of fluid-dynamical models to the physics of Quark-Gluon Plasma created in ultra-relativistic nuclear collisions has inspired a number of theoretical investigations aimed at understanding how this is possible, given the complexity of the post-collision state. I will describe a possible resolution of this "early-thermalisation puzzle" which is suggested by studies of various idealised models.

The seminar will be in a hybrid mode, local people are invited to meet in the seminar room D-2-02.

Piotr Korcyl, Jacek Wosiek, Michał Praszałowicz

Dear All,

We would like to invite you to the lecture on Basics of Colour Glass Condensate.

The lecture will be tomorrow 9th May at 2pm:

https://events.ncbj.gov.pl/event/137/

Speaker: Professor Jamal.Jalilian-Marian

Title:

Basics of Colour Glass Condensate (2/2)1h

https://www.gotomeet.me/NCBJmeetings/electron-ion-collider

Best Regards,

Krzysztof Kutak, Jakub Wagner, Agnieszka Łuszczak (on behalf of the representatives,

## Zapraszamy na seminarium 10.05.2022

Dear All,

we have the pleasure to invite you to the Particle Theory Seminar on Tuesday,

May 10 at 12:15, which will be given by

Yan-Qing Ma (Peking University)

entitled

“From linear algebra to Feynman integrals”

Abstract: I will show that all Feynman integrals, to any loop orders and including all types of propagators, are completely determined by linear algebra between Feynman integrals. This observation results in a very powerful method (AMF) to calculate Feynman integrals, which is in fact the only method on the market to calculate arbitrary Feynman integrals to high precision. The method has been implemented in our open source package "AMFlow".

The seminar will be in a hybrid mode, local people are invited to meet in the seminar room D-2-02.

Piotr Korcyl, Jacek Wosiek, Michał Praszałowicz

## Zapraszamy na seminarium 12.04.2022

Dear All,

we have the pleasure to invite you to the Particle Theory Seminar on Tuesday,

April 12 at 12:15, which will be given by

Larry McLerran (INT Seattle)

entitled

"Neutron stars and quarkyonic matter".

The seminar will be in a hybrid mode, local people are invited to meet in the seminar room D-2-02.

Piotr Korcyl, Jacek Wosiek, Michał Praszałowicz

## Zapraszamy na seminarium 22.03.2022

Dear All,

we have the pleasure to invite you to the Particle Theory Seminar on Tuesday,

March 22 at 12:15, which will be given by

Jacek Otwinowski (IFJ PAN)

entitled

"Nuclear structure at high energy with ALICE at the LHC".

The seminar will be in a hybrid mode, local people are invited to meet in the seminar room D-2-02.

Piotr Korcyl, Jacek Wosiek, Michał Praszałowicz

## Zapraszamy na seminarium 15.03.2022

Dear All,

we have the pleasure to invite you to the Particle Theory Seminar on Tuesday,

March 15 at 12:15, which will be given by

Jerzy Karczmarczuk

entitled

“Computations in Physics, and Corecursive programming techniques".

The seminar will be in a hybrid mode, local people are invited to meet in the seminar room D-2-02.

Piotr Korcyl, Jacek Wosiek, Michał Praszałowicz

Dear all,

we would like to invite you to a series of lectures on EIC physics. The lectures are going to be at the undergraduate, beginning graduate level and will address basics as well as new developments in QCD.

The lectures will be delivered by:

Krzysztof Golec-Biernat

Marcus Diehl

Jamal Jalilian-Marian

Cedric Lorce

Anna Stasto

The detailed description of the course and the scope of the lectures can be found at https://eicpl.ifj.edu.pl/doku.php

## Zapraszamy na seminarium 8.03.2022

Dear All,

we have the pleasure to invite you to the Particle Theory Seminar on Tuesday,

March 8 at 12:15, which will be given by

Magdalena Sławińska (Instytut Fizyki Jądrowej PAN)

entitled

“Constraining Higgs boson properties using WW*(→e ν μ ν) jj  final state with the ATLAS detector.".

The seminar will be in a hybrid mode, local people are invited to meet in the seminar room D-2-02.

Piotr Korcyl, Jacek Wosiek, Michał Praszałowicz

## Zapraszamy na seminarium 1.03.2022

Dear All,

we have the pleasure to invite you to the Particle Theory Seminar on Tuesday,

March 1 at 12:15, which will be given by

dr hab. Andrzej Siódmok, prof. UJ (Instytut Informatyki Stosowanej)

entitled

“New approach to measure quark and gluon jets at the LHC".

The seminar will be in a hybrid mode, local people are invited to meet in the seminar room D-2-02.

Jacek Wosiek, Michał Praszałowicz, Piotr Korcyl

## Zapraszamy na seminarium EIC

Dear All,

I would like to invite you to the EIC PL Seminar on 28th February at

Speaker: Professor IGNAZIO SCIMEMI (Complutense University of Madrid)

Title: Progresses in TMD studies

Abstract: The understanding and phenomenological evidence of TMD has received some notable progress. Together with my collaborators,we have understood how TMD factorization arises using the background field method in QCD, so extending its validity to next-to-leading power in a small transverse momentum expansion. Phenomenologically we have understood some crucial understanding of errors in the extraction of unpolarized quark TMD. If some time is left, I will also report on the possibility of extracting gluon TMD at EIC with a di-jet process.

https://www.gotomeet.me/NCBJmeetings/electron-ion-collider

Access Code: 395-721-853

## Zapraszamy na seminarium 11.01.2022

Dear All,

we have the pleasure to invite you to the Particle Theory Seminar on Tuesday,

January 11 at 12:15

dr. Tomasz Stebel (IFT)

Czy sieć neuronowa może nauczyć się fizyki? - część II
Can neural network learn physics? - part II

The seminar will be in a hybrid mode, local people are invited to meet in the seminar room D-02-2.

## Zapraszamy na seminarium 14.12.2021

Dear All,

we have a pleasure to invite you to the Particle Theory Seminar on Tuesday, November 23 at 12:15:

Prof. Laurent Lellouch (CNRS & Aix-Marseille U.)

Twenty years ago in an experiment at Brookhaven National Laboratory, physicists measured the muon's anomalous magnetic moment, $a_\mu=(g_\mu-2)/2$, with a remarkable precision of 0.54 parts per million. Since then, the standard model prediction for $a_\mu$ has exhibited a discrepancy with experiment of over 3 standard deviations, raising the tantalizing possibility of physical particles or forces as yet undiscovered. On April 7 a new experiment at Fermilab presented its first results, brilliantly confirming Brookhaven's measurement and bringing the discrepancy with the standard model to a near discovery level of 4.2 sigma. To fully leverage this and future measurements, and possibly claim the presence of new fundamental physics, it is imperative to check the standard model prediction with independent methods, and to reduce its uncertainties. After an introduction and a discussion of the current experimental and theoretical status of $a_\mu$, I will present a precise lattice QCD calculation, by the BMW collaboration, of the contribution to this quantity that most limits the precision of the standard model prediction.  The result of this calculation significantly reduces the gap between the standard model and experiment, and suggests that new physics may not be needed to explain the current, experimental, world-average value of $a_\mu$.

Seminar will be on-line, however local people are encouraged to meet in the seminar room D-2-02. People interested in the on-line participation are kindly requested to let us know by email and we will send zoom coordinates.

## Zapraszamy na seminarium EIC

Dear Members of the PL EIC Community,

I would like to invite you to the EIC PL Seminar on 13th December at

Speaker: dr hab. Tolga Altinoluk (NCBJ)

Abstract

Color Glass Condensate (CGC) is the effective theory that is used to study high energy hadronic collisions. One of the key approximations adopted in the CGC framework is the so-called eikonal approximation. In this approximation, one neglects all power-suppressed energy corrections and just keeps the leading contribution. While this approximation is very successful and powerful tool to describe the asymptotically high energy scatterings, in reality the scattering energies that are reached in the experiments are limited. In this talk, we present a systematic way to include subeikonal corrections in the CGC calculations which are expected to be sizable for future EIC phenomenology.

https://www.gotomeet.me/NCBJmeetings/electron-ion-collider

Access Code: 395-721-853

## Zapraszamy na seminarium 7.12.2021

Dear All,

we have the pleasure to invite you to the Particle Theory Seminar on Tuesday, December 7 at 12:15:

Dr. Tomasz Stebel
(IFT)

Czy sieć neuronowa może nauczyć się fizyki? (część II) (ODWOŁANE)

Seminar will be on-line, however local people are encouraged to meet in the seminar room D-2-02. People interested in the on-line participation are kindly requested to let us know by email and we will send zoom coordinates.

## Zapraszamy na seminarium 30.11.2021

Dear All,

we have a pleasure to invite you to the Particle Theory Seminar on Tuesday, November 30 at 12:15:

Dr. Tomasz Stebel
(IFT)

Czy sieć neuronowa może nauczyć się fizyki?

Seminar will be on-line, however local people are encouraged to meet in the seminar room D-2-02. People interested in the on-line participation are kindly requested to let us know by email and we will send zoom coordinates.

## Zapraszamy na seminarium 23.11.2021

Dear All,

we have a pleasure to invite you to the Particle Theory Seminar on Tuesday, November 23 at 12:15:

Dr. Savvas Zafeiropoulos
(Aix Marseille Univ., Université de Toulon)

The extraction of light cone parton distributions from lattice quantum chromodynamics The light-cone definition of Parton Distribution Functions (PDFs) does not allow for a direct ab initio determination employing methods of Lattice QCD simulations that naturally take place in Euclidean spacetime. In this presentation we focus on pseudo-PDFs where the starting point is the equal time hadronic matrix element with the quark and anti-quark fields separated by a finite distance. We focus on Ioffe-time distributions, which are functions of the Ioffe-time ν, and can be understood as the Fourier transforms of parton distribution functions with respect to the momentum fraction variable 𝑥. We present lattice results for the case of the nucleon and the pion addressing among others the physical point and continuum extrapolations. We also incorporate our lattice data in the NNPDF framework treating them on the same footing as experimental data and discuss in detail the different sources of systematics in the determination of the non-singlet PDFs.

Seminar will be on-line, however local people are encouraged to meet in the seminar room D-2-02. People interested in the on-line participation are kindly requested to let us know by email and we will send zoom coordinates.
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