Dark sector shining through 750 GeV dark Higgs boson at the LHC
We consider a dark sector with SU(3)C×U(1)Y×U(1)X and three families of dark fermions that are chiral under dark U(1)X gauge symmetry, whereas scalar dark matter X is the SM singlet. U(1)X dark symmetry is spontaneously broken by nonzero VEV of dark Higgs field 〈Φ〉, generating the masses of dark fer...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2016-07-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269316301617 |
| _version_ | 1811202367939411968 |
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| author | P. Ko Takaaki Nomura |
| author_facet | P. Ko Takaaki Nomura |
| author_sort | P. Ko |
| collection | DOAJ |
| description | We consider a dark sector with SU(3)C×U(1)Y×U(1)X and three families of dark fermions that are chiral under dark U(1)X gauge symmetry, whereas scalar dark matter X is the SM singlet. U(1)X dark symmetry is spontaneously broken by nonzero VEV of dark Higgs field 〈Φ〉, generating the masses of dark fermions and dark photon Z′. The resulting dark Higgs boson ϕ can be produced at the LHC by dark quark loop (involving 3 generations) and will decay into a pair of photon through charged dark fermion loop. Its decay width can be easily ∼45 GeV due to its possible decays into a pair of dark photon, which is not strongly constrained by the current LHC searches pp→ϕ→Z′Z′ followed by Z′ decays into the SM fermion pairs. The scalar DM can achieve thermal relic density without conflict with direct detection bound or the invisible ϕ decay into a pair of DM. |
| first_indexed | 2024-04-12T02:38:33Z |
| format | Article |
| id | doaj.art-4dc4cbebfaf74872b3dd90a377fecef2 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 1873-2445 |
| language | English |
| last_indexed | 2024-04-12T02:38:33Z |
| publishDate | 2016-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-4dc4cbebfaf74872b3dd90a377fecef22022-12-22T03:51:24ZengElsevierPhysics Letters B0370-26931873-24452016-07-01758C20521110.1016/j.physletb.2016.05.014Dark sector shining through 750 GeV dark Higgs boson at the LHCP. KoTakaaki NomuraWe consider a dark sector with SU(3)C×U(1)Y×U(1)X and three families of dark fermions that are chiral under dark U(1)X gauge symmetry, whereas scalar dark matter X is the SM singlet. U(1)X dark symmetry is spontaneously broken by nonzero VEV of dark Higgs field 〈Φ〉, generating the masses of dark fermions and dark photon Z′. The resulting dark Higgs boson ϕ can be produced at the LHC by dark quark loop (involving 3 generations) and will decay into a pair of photon through charged dark fermion loop. Its decay width can be easily ∼45 GeV due to its possible decays into a pair of dark photon, which is not strongly constrained by the current LHC searches pp→ϕ→Z′Z′ followed by Z′ decays into the SM fermion pairs. The scalar DM can achieve thermal relic density without conflict with direct detection bound or the invisible ϕ decay into a pair of DM.http://www.sciencedirect.com/science/article/pii/S0370269316301617 |
| spellingShingle | P. Ko Takaaki Nomura Dark sector shining through 750 GeV dark Higgs boson at the LHC Physics Letters B |
| title | Dark sector shining through 750 GeV dark Higgs boson at the LHC |
| title_full | Dark sector shining through 750 GeV dark Higgs boson at the LHC |
| title_fullStr | Dark sector shining through 750 GeV dark Higgs boson at the LHC |
| title_full_unstemmed | Dark sector shining through 750 GeV dark Higgs boson at the LHC |
| title_short | Dark sector shining through 750 GeV dark Higgs boson at the LHC |
| title_sort | dark sector shining through 750 gev dark higgs boson at the lhc |
| url | http://www.sciencedirect.com/science/article/pii/S0370269316301617 |
| work_keys_str_mv | AT pko darksectorshiningthrough750gevdarkhiggsbosonatthelhc AT takaakinomura darksectorshiningthrough750gevdarkhiggsbosonatthelhc |