Workshop EJČF 2018

Session

UPC

15 Jan 2018, 13:45

Bílý Potok (u Frýdlantu)

7. Ultraperipheral collisions with ALICE

Roman Lavička (CTU FNSPE)

15/01/2018, 13:45

There are several different predictions for the behaviour of the gluon distribution in nuclei at small Bjorken $x$ and experimental data is needed to chose among them. This is achieved by measuring the cross section of processes specially sensitive to this parton distribution. We focus on ultra-peripheral collision of lead-lead nuclei producing a J/$\psi$ meson. Our main task is to calculate...

2. Luminozita na LHC

Jan Půček (CTU FNSPE)

15/01/2018, 14:40

Presentation

Luminozita je veličina, která udává poměr mezi frekvencí interakce a jejím účinným průřezem. Velkou výhodou luminozity je nezávislost na procesu. Ze znalosti luminozity a frekvence interakcí lze spočítat účinný průřez dané interakce. Na urychlovačích, používajících shluky částic ve svazku, je rozšířena metoda určení luminozity nesoucí název po fyziku Simonu van der Meeru. Pomocí této metody,...

44. Difrakce v částicové fyzice

David Horák (České vysoké učení technické v Praze)

15/01/2018, 15:00

Difrakční procesy se ukazují jako velmi velmi dobrá sonda do struktury protonu. Tyto procesy se v 60. letech pokoušela vysvětlit Reggeho teorie pomocí výměny tzv. pomeronu, a to velmi úspěšně. V této přednášce představím koncept této teorie a nahlédneme na ní z pohledu moderní kvantové chromodynamiky.

39. Numerical solutions to the Balitsky-Kovchegov evolution equation

Dagmar Bendová (CTU FNSPE)

15/01/2018, 15:55

Presentation

The high energy limit of QCD can be studied using the Deep inelastic scattering (DIS) at small Bjorken-x. Under these circumstances the gluon density rapidly increases. However the increase is eventually tamed by recombination, as the experimental data suggest us, which leads to the effect called parton saturation. To predict the cross-section of DIS we need to determine the cross-section of...

4. TMD approach to the dipole model and the rcBK equation

Marek Matas (České vysoké učení technické v Praze)

15/01/2018, 16:25

Using the rcBK evolution equation to calculate the scattering amplitude and from it, the Transverse Momentum Distribution functions can be very useful because of its use in calculation of factorised cross sections. In this contribution, we will address some key aspects of this topic as well as show, how such computation can be carried out.

38. ALICE AD detector

Michal Broz (České vysoké učení technické v Praze)

15/01/2018, 17:20

A compact detector called AD was added to the ALICE apparatus at the beginning of the LHC run 2 in order to extend the trigger capabilities. In this talk we will concentrate on all kinds of boring details about calibration, data reconstruction and quality assurance in order to provide a picture of how a small part of modern high-energy experiment works in the real life.

18. Photoproduction of J/𝜓 with ALICE

Tomáš Herman (CTU FNSPE)

The exclusive photoproduction of a $J/\Psi$ allows us to examine the transverse distribution of matter inside proton or nucleus targets. Moreover, this photoproduction is a great tool to explore the phenomenon of saturation and nuclear shadowing in the region of low $x$. From QED calculations and models describing the QCD part of the interaction it is possible to calculate the cross section...