Higgs To Mu-Tau Decays Would Encourage \(B-L\) Ssm

While Egyptian airplanes boot the bucket on on collapsing (President el-Sisi's foes accept decorated the same aircraft amongst graffiti "we volition choose this aircraft down" some 2 years ago!) in addition to Erdogan keeps on blackmailing Europe (and proving the cluelessness of the politicians who wanted or desire to promote Turkey into a primal solver of Europe's problems), a novel Turkish-Egyptian hep-ph newspaper looks unexpectedly sexy:

Large \(BR(h \to \tau \mu)\) inwards Supersymmetric Models

Hammad, Khalil, in addition to Un analyze how compatible the uncomplicated plenty supersymmetric models are amongst a perchance emerging upshot of the LHC analyses – namely the decay of the Higgs to a flavor-violating pair\[

h\to\mu^\pm \tau^\mp

\] which seems to appear inwards roughly a 2-sigma excessive release of events both at ATLAS in addition to CMS in addition to the suggested branching ratio is around 1%.




The trio says that it's real unlikely that the normal minimal supersymmetric criterion model may generate this flavor-violating decay. The supersymmetric seesaw model generates the the season mixing radiatively in addition to the predicted branching ratio is much smaller than 1%.




On the other hand, they discovery out that the supersymmetric models amongst the \(B-L\) estimate symmetry predict the large branching ratio rather generically in addition to naturally. That's cool because I accept had other reasons to honey the \(B-L\) models.

Note that \(B-L\) naturally arises every bit a estimate symmetry inwards the left-right-symmetric models that accept been discussed (also on this blog) because of the (now largely abandoned) hints of novel estimate bosons around \(2,3\TeV\). In these models, the left-right-asymmetric Standard Model formula for the electrical accuse \(Q=Y/2+T_3\) is replaced with \(Q=(B-L)/2+T_{3L}+T_{3R}\), a combination of generators of estimate groups \(U(1)_{B-L}\times SU(2)_L\times SU(2)_R\). With the extra \(SU(2)_R\), the left-handed in addition to right-handed 2-component spinor parts of the quark in addition to lepton fields may move reunified into a unmarried doublet in 1 lawsuit again piece the \(125\GeV\) Higgs is supposed to move a nation inwards the \((2,2)\) representation.

Such left-right-symmetric models may naturally move embedded inwards grand unified theories exactly \(SU(5)\) isn't enough. You quest \(SO(10)\) or \(E_6\) – which I accept ever preferred, anyway, non solely because they unify the representations of quarks in addition to leptons into 1 (per generation; the iii reps may move unified into 1 if 1 uses a season symmetry). One could debate that at that spot be several other hints, including the \(750\GeV\) cernette, which are to a greater extent than probable to move explained inside left-right-symmetric or \(SO(10)\) or \(E_6\) models than asymmetric or \(SU(5)\)-based models.

The LHC collisions volition move restarted tomorrow, on Thursday. Each major detector has collected nigh 0.8 inverse femtobarns inwards 2016. Within a month, the integrated luminosity for 2016 could surpass the luminosity for the whole yr 2015, which was below 4/fb, in addition to the LHC could accelerate its information collection induce before long afterwards.

Many things are possible in addition to perhaps likely: the \(750\GeV\) cernette, gluino nigh \(1.5\TeV\) in addition to diverse other, less visible superpartners around \(0.5\TeV\), the flavor-violating decay of the Higgs, in addition to others. 2016 could move the yr when the experiments volition outpouring ahead of the particle physics phenomenology – inwards the feel that the phenomenologists volition accept to run difficult to grab upwardly amongst the experiments. At the same moment, I tend to experience that the explanation of those novel discoveries, if any, volition move rather conservative – compatible amongst the scenarios that I accept considered the prettiest ones for decades.