A closer look at string resonances in dijet events at the LHC

Abstract

The first string excited state can be observed as a resonance in dijet invariant mass distributions at the LHC, if the scenario of low-scale string with large extra dimensions is realized. A distinguished property of the dijet resonance by string excited states from that the other "new physics" is that many almost degenerate states with various spin compose a single resonance structure. It is examined that how we can obtain evidences of low-scale string models through the analysis of angular distributions of dijet events at the LHC. Some string resonance states of color singlet can obtain large mass shifts through the open string one-loop effect, or through the mixing with closed string states, and the shape of resonance structure can be distorted. Although the distortion is not very large (10% for the mass squared), it might be able to observe the effect at the LHC, if gluon jets and quark jets could be distinguished in a certain level of efficiency.

arXiv comment12 pages, 8 figures

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• Searching for string resonances in e^+e^- and γγcollisions
• Hadron Collider Searches for Diboson Resonances
• Detectability of the second resonance of low-scale string models at the LHC
• LHC Phenomenology of Lowest Massive Regge Recurrences in the Randall-Sundrum Orbifold
• Constraints on antisymmetric tensor fields from Bhabha scattering
• Signatures of low-scale string models at the LHC
• Anomaly Puzzle, Curved-Spacetime Spinor Hamiltonian, and String Phenomenology