Narrow Results

In this work we study the electric charge effect on the cross section production of charged mini black holes (MBH) in accelerators. We analyze the charged MBH solution using the fat brane approximation in the context of the ADD model. The maximum charge–mass ratio condition for the existence of a horizon radius is discussed. We show that the electric charge causes a decrease in this radius and, consequently, in the cross section. This reduction is negligible for protons and light-ions but can be important for heavy-ions.

Quasimolecular optical potentials used for identical nuclei have been modified for application to different interacting nuclei. This has been applied to the ²⁸Si–¹⁶O system and compared with those results using the Woods–Saxon potential that had been found to reproduce the experimental results. The result indicates that the modification is useful and provides information on nuclear properties and explains the origin of imaginary potential. It has the applicability to a wide range of nuclei.

Several experiments engaging kaon beams have been carried out to study the existence of deeply bound kaonic state. We proposed an alternative method, which exploits a p + p reaction at 3.5 GeV incoming energy to search for the most elementary of the kaonic states: _ppK^-. This experiment is planned with the FOPI spectrometer at GSI and a silicon-based trigger system has been developed to increase the detection capability of the existing system for the reaction of interest. Several tests have been performed under realistic beam conditions to test the feasibility of the measurement and the proof of principle of the trigger system. The positive results of such measurements are shown in this contribution together with the expected rates extracted from simulations.

New data for the quasielastic scattering of ²⁰Ne from a ²⁸Si target at incident energies of 42.5 MeV and 52.3 MeV and for the ²⁸Si(²⁰Ne, ²⁴Mg)²⁴Mg, ²⁸Si(²⁰Ne, ¹⁶O)³²S and ²⁸Si(²⁰Ne, ¹²C)³⁶Ar transfer reactions at 52.3 MeV are reported. Oscillations are observed in the backward angle quasielastic scattering data at 52.3 MeV and the ²⁸Si(²⁰Ne, ¹²C)³⁶Ar transfer cross-sections are of the same magnitude as those for single-α stripping. Coupled reaction channels (CRC) calculations are unable to describe either the quasielastic or the ²⁸Si(²⁰Ne, ¹²C)³⁶Ar transfer data assuming a sequential α transfer process with α-particle form factors from the literature. The addition of direct ⁸Be cluster transfer can provide a reasonable description of both data sets, but only with much larger spectroscopic factors than suggested by simple structure calculations or the large ⁸Be emission thresholds of ²⁰Ne, ²⁸Si and ³⁶Ar, suggesting that the observed structure is of resonance-like origin. An optical model analysis of the quasielastic scattering data is also reported.

This article describes the current status of the search for evidence for the Chiral Magnetic Effect (CME) using ultra-relativistic heavy-ion collisions at the Relativistic Heavy-Ion Collider (RHIC) at BNL, New York, USA, and the Large Hadron Collider (LHC), at CERN, Geneva, Switzerland.

Several experiments engaging kaon beams have been carried out to study the existence of deeply bound kaonic state. We proposed an alternative method, which exploits a p + p reaction at 3.5 GeV incoming energy to search for the most elementary of the kaonic states: ppK^-. This experiment is planned with the FOPI spectrometer at GSI and a silicon-based trigger system has been developed to increase the detection capability of the existing system for the reaction of interest. Several tests have been performed under realistic beam conditions to test the feasibility of the measurement and the proof of principle of the trigger system. The positive results of such measurements are shown in this contribution together with the expected rates extracted from simulations.