Asymptotic helicity conservation in SUSY

Gounaris, G. J.; Layssac, J.; Renard, F.M.

doi:10.1002/prop.201000016

Cited by 2 publications

(4 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…of (9) is of course determined by (6), and similar expressions for the other gauge bosons. As seen in (9), most of the gauge and gaugino asymptotic amplitudes, are identical. But for µ −τ = ±1, sign differences appear, related to the way the fermionic states in the l.h.s.…”

Section: Supersimplicity For Gg → V Vmentioning

confidence: 67%

“…Results analogous to (9), are also true for longitudinal vector bosons, which necessarily include higgsino amplitudes in the l.h.s. [13,10,14].…”

Section: Supersimplicity For Gg → V Vmentioning

confidence: 95%

“…In such a case all HV amplitudes vanish asymptotically like inverse powers of the energy, while the HC ones tend to non-vanishing constants. Particularly for processes involving external gauge bosons, huge cancellations among the various diagrams contrive to establish HCns [9].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Untitled

Gounaris¹,

Renard²

2011

Acta Phys. Pol. B

Self Cite

View full text Add to dashboard Cite

It is known that for any 2-to-2 process in MSSM, only the helicity conserving (HC) amplitudes survive asymptotically. Studying many such processes, at the 1-loop Electroweak (EW) order, it is found that their high energy HC amplitudes are determined by just three forms: a log-squared function of the ratio of two of the (s, t, u) variables, to which a π 2 is added; and two Sudakov-like ln-and ln 2 -terms accompanied by respective massdependent constants. Apart from a possible additional residual constant (which is also discussed), these HC amplitudes, may be expressed as linear combinations of the above three forms, with coefficients being rational functions of the (s, t, u) variables. This 1-loop property, called supersimplicity, is of course claimed for the 2-to-2 processes considered; but no violating examples are known at present. For ug → dW , supersimplicity is found to be a very good approximation at LHC energies, provided the SUSY scale is not too high. SM processes are also discussed, and their differences are explored.

show abstract

Section: Supersimplicity For Gg → V Vmentioning

confidence: 67%

“…Results analogous to (9), are also true for longitudinal vector bosons, which necessarily include higgsino amplitudes in the l.h.s. [13,10,14].…”

Section: Supersimplicity For Gg → V Vmentioning

confidence: 95%

See 1 more Smart Citation

Untitled

Gounaris¹,

Renard²

2011

Acta Phys. Pol. B

Self Cite

View full text Add to dashboard Cite

show abstract

“…In such detail calculations, we have observed that in processes involving external gauge bosons, huge cancelations among the various diagrams need to conspire, in order to establish HCns [1,2,3]. On the contrary, no such cancelations appear, in processes where all external particles are fermions or scalars.…”

Section: Introductionmentioning

confidence: 99%

THE PROCESSES $gg\to\tilde\chi^+_i\tilde\chi^-_j$, $\tilde\chi^0_i\tilde\chi^0_j$ AT HIGH ENERGIES

Gounaris

Layssac

Renard

2011

Int. J. Mod. Phys. A

Self Cite

View full text Add to dashboard Cite

The processes gg →χ AbstractAccording to the helicity conservation (HCns) theorem, the sum of the helicities should be conserved, in any 2-to-2 processes in MSSM with R-parity conservation, at high energies; i.e. all amplitudes violating this rule, must vanish asymptotically. The realization of HCns in gg →χj is studied, at the one loop electroweak order (EW), and simple high energy expressions are derived for the non-vanishing helicity conserving (HC) amplitudes. These are very similar to the corresponding expressions for gg → W + W − , ZZ, γZ, γγ derived before. Asymptotic relations among observable unpolarized cross sections for many such processes are then obtained, some of which may hold at LHC-type energies.

show abstract

Asymptotic helicity conservation in SUSY

Cited by 2 publications

References 13 publications

Untitled

Untitled

THE PROCESSES $gg\to\tilde\chi^+_i\tilde\chi^-_j$, $\tilde\chi^0_i\tilde\chi^0_j$ AT HIGH ENERGIES

Contact Info

Product

Resources

About