Conveners
Strong Interactions and Hadron Physics - Posters: Block I
- Martin Spousta (Charles University)
- Antonio Vilela Pereira (Universidade do Estado do Rio de Janeiro (BR))
We shall report the measurement of the central exclusive production process $pp \ \rightarrow \ pXp$ in proton-proton collisions at RHIC with the STAR detector at $\sqrt{\mathrm{s}} = 510$ GeV. At this energy, this process is dominated by a Double Pomeron Exchange mechanism. The tracks of centrally produced system $X$ were reconstructed in the central detector of STAR, the Time Projection...
Transverse Momentum Dependent (TMD) parton distributions obtained within the Parton Branching (PB) approach offer a wide spectrum of applications to describe processes in pp as well as in ep interactions. We give an overview of the PB TMD distributions and show examples of applications of the PB TMD distributions to describe Drell-Yan processes, boosted W/Z production as well as jet production...
Investigation of GPDs and TMDs represents one of the major goals of the COMPASS-II program. Together, GPDs and TMDs provide the most complete description of the partonic structure of a nucleon. GPDs can be accessed by lepton-induced exclusive scattering processes, such as Deep Virtual Compton Scattering or Hard Exclusive Meson Production. The exclusive $\pi^{0}$ production is the main source...
Recently, it was shown that the ground state of quantum chromodynamics in sufficiently strong magnetic fields and at moderate baryon densities carries a crystalline condensate of neutral pions: the chiral soliton lattice (CSL). This phase cannot be realized from first principles using standard lattice Monte Carlo simulations due to the infamous sign problem. On the other hand, we show that...
The LHCb collaboration have recently updated their analysis of the resonant $J/\psi\, p$ mass spectrum in the decay $\Lambda_b^0 \to J/\psi\, p\, K^-$, making use of their combined Run 1 and Run 2 data. In the updated analysis, three narrow states, $P_c (4312)^+$, $P_c (4440)^+$, and $P_c (4457)^+$, are observed. The spin-parity assignments of these states are not yet known. We interpret these...
The $\eta^\prime$-meson energy spectrum in the inclusive $\Upsilon (1S) \to \eta^\prime g g g \to \eta^\prime X$ decay measured by the CLEO Collaboration in 2002 allowed one to constrain the lowest Gegenbauer coefficients $B^q_2$ and $B^g_2$ of the quark-antiquark and gluonic distribution amplitudes of the $\eta^\prime$-meson entering the $\eta^\prime g^* g$ effective vertex function (EVF)....
