Eur. Phys. J. C (2018) 78: 724
https://doi.org/10.1140/epjc/s10052-018-6183-4

Regular Article - Theoretical Physics

Revealing timid pseudo-scalars with taus at the LHC

¹ Université de Lyon, Lyon, France
² Université Lyon 1, CNRS/IN2P3, UMR5822, IPNL, 69622, Villeurbanne Cedex, France
³ Department of Physics, Chalmers University of Technology, Fysikgården, 41296, Göteborg, Sweden
⁴ Center for Theoretical Physics of the Universe, Institute for Basic Science (IBS), Daejeon, 34126, Korea
⁵ Department of Astronomy and Theoretical Physics, Lund University, SE-223 62, Lund, Sweden

^* e-mail: flacke@ibs.re.kr

Received: 17 April 2018
Accepted: 23 August 2018
Published online: 6 September 2018

Abstract

A light pseudo-scalar that is copiously produced at the LHC may still be allowed by present searches. While masses above 65 GeV are effectively covered by di-photon searches, the lower mass window can be tested by a new search for boosted di-tau resonances. We test this strategy on a set of composite Higgs models with top partial compositeness, where most models can be probed with an integrated luminosity below 300 .