2017:groups:np:efttherror
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2017:groups:np:efttherror [2017/06/22 12:15] olivier.mattelaer |
2017:groups:np:efttherror [2017/07/05 09:20] benjamin.fuks |
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| - | A question that often arises is wheter dimension-8 effects compromise present analysis testing dimension-6 ones. Normally this requires a discussion about the expected size of dimension-8 operators under given assumptions (see for instance "On the Validity of the Effective Field Theory Approach to SM Precision Tests" https://arxiv.org/pdf/1604.06444.pdf) | ||
| - | Here we want to compute a class of dimesnion-8 effects that arises after a change of basis, in such a way that their coefficient is uniquely related to the coefficients of dimension-6 operators. | + | A question that often arises is whether dimension-8 effects compromise present analysis testing dimension-6 ones. Normally this requires a discussion about the expected size of dimension-8 operators under given assumptions (see for instance "On the Validity of the Effective Field Theory Approach to SM Precision Tests" https://arxiv.org/pdf/1604.06444.pdf) |
| + | |||
| + | Here we want to compute a class of dimension-8 effects that arises after a change of basis, in such a way that their coefficient is uniquely related to the coefficients of dimension-6 operators. | ||
| The goal of this analysis will be to understand under what conditions we can trust the dimension-6 analysis in the rotated basis. | The goal of this analysis will be to understand under what conditions we can trust the dimension-6 analysis in the rotated basis. | ||
| Line 32: | Line 33: | ||
| 1) perform field redefinition to find the coefficient of O_8 as a function of the coefficient of O_1 | 1) perform field redefinition to find the coefficient of O_8 as a function of the coefficient of O_1 | ||
| - | -> Francesco | + | -> **Francesco** |
| 2) comupte contribution to \psi\psi -> V_L V_L from O_1, O_2 and O_8 | 2) comupte contribution to \psi\psi -> V_L V_L from O_1, O_2 and O_8 | ||
| Use Re-Weighting method to avoid statistical error in the various generation | Use Re-Weighting method to avoid statistical error in the various generation | ||
| - | -> Model and param_card created by Ken -> Run by Olivier | + | -> Model and param_card created by Ken + **Ramona** -> Run by **Olivier** |
| 3) Impose that the quadratic piece be bigger than the linear piece, and test in these conditions how big the dimension-8 contribution becomes | 3) Impose that the quadratic piece be bigger than the linear piece, and test in these conditions how big the dimension-8 contribution becomes | ||
| - | -> Olivier | + | -> **Olivier** |
| 4) Understand wheter this behavior is the same in other processes | 4) Understand wheter this behavior is the same in other processes | ||
| - | -> Shanka: O_W, O_B and O_WB and O_phi_1 (this one is strongly constrained by custodial symmetry, that's what I remember) (Eq. 2 in Ref. https://arxiv.org/pdf/1211.4580.pdf) which modify the ZWW/ gamma WW couplings as given in Eqs. 27 and 28. | + | -> **Shankha**: O_W, O_B and O_WB and O_phi_1 (this one is strongly constrained by custodial symmetry, that's what I remember) (Eq. 2 in Ref. https://arxiv.org/pdf/1211.4580.pdf) which modify the ZWW/ gamma WW couplings as given in Eqs. 27 and 28. |
| - | -> Ken for generating the model, Shanka for the generation/comparaison | + | -> **Ken** and **Ramona** for generating the model, **Biplob** and **Shankha** for the generation/comparaison |
| Line 51: | Line 52: | ||
| 1) generate the model with and without those contributions | 1) generate the model with and without those contributions | ||
| - | -> Benj | + | -> **Benj** |
| + | |||
| + | * {{:2017:groups:np:hel.dim6.fullytruncated.tgz|Here}} is a model fully truncated at the dim 6 level. | ||
| 2) generate p p > W W (same process as above) and compare the various results. | 2) generate p p > W W (same process as above) and compare the various results. | ||
| Use Re-Weighting method to avoid statistical error in the various generation | Use Re-Weighting method to avoid statistical error in the various generation | ||
| - | -> Ken and Olivier | + | -> **Ken** and **Olivier** |
2017/groups/np/efttherror.txt · Last modified: 2017/08/15 13:45 by francesco.riva
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