tailieunhanh - Radion production in e+e- collisions

We analyse the potential of the e+e − collisions to search for the radion in the Randall-Sundrum model. The radion production in the e+e − colliders with polarization of e+, e− beams was studied in detail. Numerical evaluation shows that if the radion mass is not too heavy then the reaction can give observable cross section at the high energies in future colliders with the high degree of polarization. | Communications in Physics, Vol. 25, No. 1 (2015), pp. 45-50 DOI: RADION PRODUCTION IN e+ e− COLLISIONS BUI THI HA GIANG AND DAO THI LE THUY Hanoi University of Education, 36 Xuan Thuy, Cau Giay, Hanoi, Vietnam NGUYEN VAN DAI AND DANG VAN SOA Hanoi Metropolitan University, 98 Duong Quang Ham, Cau Giay, Hanoi, Vietnam E-mail: giangbth@ Received 13 October 2014 Accepted for publication 28 March 2015 Abstract. We analyse the potential of the e+ e− collisions to search for the radion in the Randall-Sundrum model. The radion production in the e+ e− colliders with polarization of e+ , e− beams was studied in detail. Numerical evaluation shows that if the radion mass is not too heavy then the reaction can give observable cross section at the high energies in future colliders with the high degree of polarization. Keywords: radion, electron, section. I. INTRODUCTION Randall and Sundrum (RS) have recently presented a simple model[1] which can solve the hierarchy problem by localizing all the standard model (SM) particles on the IR brane. The RS model predicts a new scalar particle, called radion, which stabilize the size of the extra dimension without fine tuning of parameters and is the lowest gravitational excitation in this scenario. The motivation for studying the radion is twofold. Firstly, if radion is the lightest new particle in the RS-type setup then the detection of radion in experiments will be the first important signature of the RS model. In addition, the phenomenological similarity and potential mixing of the radion and Higgs boson warrant detailed study in order to facilitate distinction between the radion and Higgs signals at colliders. Much research has been done on understanding possible mechanisms for radius stabilization and the phenomenology of the radion field [2-10]. In Refs[11- 12], authors have considered the associated production of radion with Higgs boson at γγ colliders. Recently, several authors have also