Exotic Challenges

We list and discuss theoretical consequences of recent discovery of $\Theta^+$.Comment: 9 pages, 3 figures, talk at Itneranational Workshop PENTAQUARK04, Spring-8, Japan, July 20 - 23, 200

Geometrical scaling for identified particles

We show that recently measured transverse momentum spectra of identified particles exhibit geometrical scaling (GS) in scaling variable $\tau_{\tilde{m}_{\rm T}}=(\tilde{m}_{\rm T}/Q_0)^{2} (\tilde{m}_{\rm T}/ W)^{\lambda}$ where $\tilde{m}_{\rm T}=\sqrt{m^2+p^2_{\rm T}}-m$. We explore consequences of GS and show that both mid rapidity multiplicity and mean transverse momenta grow as powers of scattering energy. Furthermore, assuming Tsallis-like parametrization of the spectra we calculate the coefficients of this growth. We also show that Tsallis temperature is related to the average saturation scale.Comment: 17 pages, 4 figures, in v2 some references added, v3 accepted in Phys. Lett. B, minor typos correcte

On a possibility of baryonic exotica

Models based on chiral symmetry predict pentaquarks that have relatively low masses. We briefly review both theoretical and experimental status of exotica in the light sector. Next, shall show how to extend chiral models to baryons with one heavy quark and show that one expects exotica also in this case. Finally, we interpret recently discovered by the LHCb collaboration five $\Omega^*_c$ resonances in terms of regular and exotic excitations of the ground state $\Omega_c$.Comment: 6 pages, 4 figures, talk at the the 2nd Jagiellonian Symposium on Fundamental and Applied Subatomic Physics, June 3-11, 2017, Krakow, Poland. In v2 minor text corrections (version accepted for publication in Acta Physica Polonica B Proceedings Supplement

Importance of Mixing for Exotic Baryons

Exotic antidecuplet baryons are predicted to be not only surprisingly light but also very narrow. First we explain how small decay width arises in the quark soliton model. Next, we study possible mixing of exotic antidecuplet with Roper octet and discuss its phenomenological consequences.Comment: 7 pages, 2 figures, presented at the workshop "Excited QCD 2010", Jan.31 - Feb.6, 2010, Stara Lesna, Slovakia. v3 replaces unsuccesful upload of v2. Referencing has been changed and some statements have been made more precise

Geometrical scaling in hadronic collisions

We show that the p_T spectra measured in pp collisions at the LHC exhibit geometrical scaling introduced earlier in the context of deep inelastic scattering. We also argue that the onset of geometrical scaling can be seen in nucleus-nucleus collisions at lower RHIC energies.Comment: 10 pages, 5 figures, based on a talk presented at Cracow Epiphany Conference "On the First Year of the LHC", Krakow, January 10-12, 2011. Small corrections in v

Exotic interpretation of Ωc\Omega_c excited states

We use the chiral quark-soliton model to interpret five excited $\Omega_c$ states recently reported by the LHCb collaboration and confirmed by Belle. We briefly recapitulate the model and its application to light baryons. We then show how the model can be extended to the case of baryons with one heavy quark. We test the model against ground state heavy baryons and then examine possible excitations. We argue that it is not possible to accommodate all five $\Omega_c$'s within five parity minus excitations predicetd by the model and propose to interpret two narrowest states split by 70 MeV as pentaquarks belonging to the SU(3) representation $\overline{15}$.Comment: Talk at the Moriond QCD 2018, 4 pages, 4 figure

Geometrical scaling and its breaking in high energy collisions

We report on recent analyses of different pieces of data, which exhibit Geometrical Scaling (GS) and its breaking. GS is a consequence of the existence of an intermediate energy scale, called saturation momentum, and allows to relate data at different energies, of different systems and also at different multiplicities and/or centralities.Comment: Presented at the 49-th Rencontres de Moriond, March 22-29, 2014, La Thuille, Italy, 4 pages, 2 figure