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2015:groups:higgs:morehiggs:largesplit [2015/06/17 15:44]
jose_miguel.no
2015:groups:higgs:morehiggs:largesplit [2015/06/18 18:09] (current)
jose_miguel.no
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 **Responsible:​** Jose Mi No  ​ **Responsible:​** Jose Mi No  ​
  
-**Members:​** Ken Mimasu, Werner Porod, Jérémy Bernon, Andrey Katz, Dipan Sengupta+**Members:​** Ken Mimasu, Werner Porod, Jérémy Bernon, Andrey Katz, Dipan Sengupta, Sanjoy Biswas
  
  
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   * Assume light A0 scenario for 2HDM (m_A0 < 100 GeV, e.g. [[http://​arxiv.org/​abs/​1412.3385]]). For TypeII 2HDM, a large splitting m_H0 - m_A0 ~ 200-300 GeV is required. For TypeI 2HDM, sizable m_H0 - m_A0 is not required but perfectly possible. In both cases, g g -> H0 -> Z A0 -> ll bb could probe this scenario for low tan_beta (< 5) as a complementary search to bbA0 ([[2015:​groups:​higgs:​morehiggs:​lowmassa]]).   * Assume light A0 scenario for 2HDM (m_A0 < 100 GeV, e.g. [[http://​arxiv.org/​abs/​1412.3385]]). For TypeII 2HDM, a large splitting m_H0 - m_A0 ~ 200-300 GeV is required. For TypeI 2HDM, sizable m_H0 - m_A0 is not required but perfectly possible. In both cases, g g -> H0 -> Z A0 -> ll bb could probe this scenario for low tan_beta (< 5) as a complementary search to bbA0 ([[2015:​groups:​higgs:​morehiggs:​lowmassa]]).
   * Use [[http://​cds.cern.ch/​record/​2014119]] to extract the limits on tan_beta in the (m_A0,m_H0) plane, in the 2HDM alignment limit:   * Use [[http://​cds.cern.ch/​record/​2014119]] to extract the limits on tan_beta in the (m_A0,m_H0) plane, in the 2HDM alignment limit:
-      The plot below shows the excluded regions for Type I: (red -> t_beta = 0.5; blue -> t_beta = 1; orange -> t_beta = 1.5; green -> t_beta = 2)+      The plot below shows the excluded regions for Type I (left) and Type II (right): (red -> t_beta = 0.5; blue -> t_beta = 1; orange -> t_beta = 1.5; green -> t_beta = 2)
       ​       ​
- ​{{:​2015:​groups:​higgs:​morehiggs:​h0toa0ztriangle.jpeg?​direct&​300|}}+ ​{{:​2015:​groups:​higgs:​morehiggs:​h0toa0ztriangle.jpeg?​direct&​300|}} ​{{:​2015:​groups:​higgs:​morehiggs:​h0toa0ztriangle_type2.jpeg?​direct&​300|}} 
 + 
 +Regarding the interplay/​contamination of bbH0 in the gg channel...  
  
      * LHC14 Prospects and interplay with bbA0      * LHC14 Prospects and interplay with bbA0
  
-          ​+     
       ​       ​
 +**Literature**:​
  
  
 +**__Light A/H__**:
  
 +  * [[http://​arxiv.org/​abs/​1412.3385]]:​ A detailed analysis of the 2HDM allowed region for a light A0 (20 GeV < m_A0 < 60 GeV), both in TypeI and TypeII. It also has a discussion of detection prospects in bbA0 and gg->A0 for "​aligment"​ and "​wrong-sign"​ scenarios, showing that in particular for TypeII the "​wrong-sign"​ can be completely explored with bbA0.  ​
  
-**Literature**:​ 
  
-  ​[[http://​arxiv.org/​abs/​1412.3385]]:​ A detailed analysis of the 2HDM allowed region for a light A0 (20 GeV < m_A0 < 60 GeV), both in TypeI and TypeII. It also has a discussion of detection prospects in bbA0 and gg->A0 for "​aligment"​ and "wrong-sign" scenarios, showing that in particular for TypeII the "​wrong-sign"​ can be completely explored with bbA0.  ​+**__Sizable Splitting in 2HDM and A->ZH/H->​ZA__**:​ 
   * [[http://​cds.cern.ch/​record/​2014119]]:​ CMS has recently carried on a search of A0 -> Z H0 / H0 -> Z A0 in ll bb, ll tautau final states. This search constraints values of tan_beta up to 4 for some (m_A0, m_H0) values with a sizable splitting.   * [[http://​cds.cern.ch/​record/​2014119]]:​ CMS has recently carried on a search of A0 -> Z H0 / H0 -> Z A0 in ll bb, ll tautau final states. This search constraints values of tan_beta up to 4 for some (m_A0, m_H0) values with a sizable splitting.
   * [[http://​arxiv.org/​abs/​1405.5537]]:​ A physical motivation for a large mass splitting m_A0 - m_H0 ~ 200-300 GeV and the search for A0 -> Z H0 at LHC is provided: this large splitting leads to a strong EW phase transition in the early universe, which could be responsible for the generation of the observed matter-antimatter asymmetry via EW baryogenesis. It also analyzes LHC14 search prospects for A0 -> Z H0 in ll bb and ll W W (W -> l nu).   * [[http://​arxiv.org/​abs/​1405.5537]]:​ A physical motivation for a large mass splitting m_A0 - m_H0 ~ 200-300 GeV and the search for A0 -> Z H0 at LHC is provided: this large splitting leads to a strong EW phase transition in the early universe, which could be responsible for the generation of the observed matter-antimatter asymmetry via EW baryogenesis. It also analyzes LHC14 search prospects for A0 -> Z H0 in ll bb and ll W W (W -> l nu).
   * [[http://​arxiv.org/​abs/​1404.1922]]:​ Detailed discussion of LHC14 search prospects for A0 -> Z H0 in both ll bb and ll Z Z, and H0 -> Z A0 in ll bb.   * [[http://​arxiv.org/​abs/​1404.1922]]:​ Detailed discussion of LHC14 search prospects for A0 -> Z H0 in both ll bb and ll Z Z, and H0 -> Z A0 in ll bb.
 +
 +
 +**__Constraints on 2HDM (e.g. Flavour)__**:​
 +  * [[http://​arxiv.org/​abs/​1208.2788]] Bounds on m_H+ from b -> s gamma, both for Type I and Type II. They show that for Type II, the bound is particularly strong (m_H+ > 380 GeV) and tan_beta independent.
    
2015/groups/higgs/morehiggs/largesplit.1434548652.txt.gz · Last modified: 2015/06/17 15:44 by jose_miguel.no