2013:groups:np:paired_resonances
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2013:groups:np:paired_resonances [2013/06/18 14:30] lorenzo.basso |
2013:groups:np:paired_resonances [2013/06/18 14:55] lorenzo.basso |
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| We start with singlets of ''SU(3)_C'' that are easier to describe. According to ''SU(2)_L × U(1)_Y'', we can have | We start with singlets of ''SU(3)_C'' that are easier to describe. According to ''SU(2)_L × U(1)_Y'', we can have | ||
| - | * Vector SU(2) singlets ''S_\mu ~ (1,Y)'' | + | * Vector SU(2) Singlets ''S_\mu ~ (1,Y)'' |
| - | In order to couple to pairs of SM fermions, ''Y=0,±1''. The case ''Y=0'' is uninteresting, because it has only | + | In order to couple to pairs of SM fermions, ''Y=0,±1''. The case ''Y=0'' is uninteresting here, because it has only trivial gauge couplings (still it can be considered in VLQ decays). Hence, the only possibility is ''Y=±1'', leading to a vector with charge ''±1'' (singlet W'). |
| - | trivial couplings. Hence, the only possibility is ''Y=±1'', leading to a vector with charge ''±1'' (singlet W'). | + | |
| - | The only vector current that can be written that preserves Lepton and Barion number couples the vector to RH quarks: ''\bar{u}_R S_\mu \gamma^\mu d_R'' | + | The only vector current that can be written that preserves Lepton and Barion number couples the vector to RH quarks: ''g_S \bar{u}_R S_\mu \gamma^\mu d_R'' |
| + | |||
| + | Single production is model dependent and depends on g_S. It usually dominates over pair production, which might take over for small g_S values. On the other side, pair production is mediated by SM gauge interaction and from this point of view, it is rather model independent. | ||
| __Signatures__: ''jjjj'' (covered), ''tbjj'' (interesting), ''tbtb'' (hopeless?) | __Signatures__: ''jjjj'' (covered), ''tbjj'' (interesting), ''tbtb'' (hopeless?) | ||
| + | |||
| + | Exemple reference: [...] | ||
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| + | * Scalar SU(2) Singlets ''S ~ (1,Y)'' | ||
| + | //To be filled// | ||
| + | |||
| + | * Vector SU(2) Doublets ''D_\mu ~ (2,Y)'' | ||
| + | Perhaps the most interesting case. | ||
| + | |||
| + | * Scalar SU(2) Doublets ''D ~ (2,Y)'' | ||
| + | //To be filled// | ||
2013/groups/np/paired_resonances.txt · Last modified: 2013/06/20 14:30 by lorenzo.basso
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