Details

Autor(en) / Beteiligte

• Chun, Eung Jin
• Kang, Zhaofeng
• Takeuchi, Michihisa
• Tsai, Yue-Lin Sming

Titel

LHC τ -rich tests of lepton-specific 2HDM for (g − 2)μ

Ist Teil von

• The journal of high energy physics, 2015-11, Vol.2015 (11), Article 99

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2015

Link zum Volltext

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• A bstract The lepton-sepcific (or type X) 2HDM (L2HDM) is an attractive new physics candidate explaining the muon g − 2 anomaly requiring a light CP-odd boson A and large tan β. This scenario leads to τ -rich signatures, such as 3 τ , 4 τ and 4 τ + W/Z , which can be readily accessible at the LHC. We first study the whole L2HDM parameter space to identify allowed regions of extra Higgs boson masses as well as two couplings λ hAA and ξ h l which determine the 125 GeV Higgs boson decays h → τ + τ − and h → AA/AA ∗ ( τ + τ − ), respectively. This motivates us to set up two regions of interest: (A) m A ≪ m H ∼ m H ± , and (B) m A ∼ m H ± ∼ O (100)GeV ≪ m H , for which derive the current constraints by adopting the chargino-neutralino search at the LHC8, and then analyze the LHC14 prospects by implementing τ -tagging algorithm. A correlated study of the upcoming precision determination of the 125 GeV Higgs boson decay properties as well as the observation of multi-tau events at the next runs of LHC will be able to shed light on the L2HDM option for the muon g − 2.