Flavor tagging TeV jets for BSM and QCD

Abstract

We present a new scheme for tagging high-$p_T$ bottom and charm jets using energetic muons. Contemporary track-based $b$ tags lose their ability to reject light jet background as jet $p_T\to \mathcal{O}(\mathrm{TeV})$, where the massive boost exposes fundamental limits in tracking resolution. For our "${\mu }_x$" tag, the signal efficiency and light jet rejection is robust versus $p_T$. In the tested regime (jet $p_T\in [0.5,2.1]$ TeV), ${\mu }_x$ tags $\sim 14\%$ of $b$ jets, $\sim 6.5\%$ of $c$ jets and $\sim 0.65\%$ of light jets. Since ${\mu }_x$ tagging should be immediately useful in a searches for heavy resonances, we test it with a typical dijet search --- a heavy, leptophobic $Z^{\prime }$.

Comments: Presentation at the DPF 2015 Meeting of the American Physical Society Division of Particles and Fields, Ann Arbor, Michigan, August 4-8, 2015. 7 pages, 4 figures