<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math>violating anomalous couplings in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>W</mml:mi><mml:mi>γ</mml:mi></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Z</mml:mi><mml:mi>γ</mml:mi></mml:math>production at the LHC

Dawson, S.; Gupta, Sudhir Kumar; Valencia, G.

doi:10.1103/physrevd.88.035008

Cited by 11 publications

(6 citation statements)

References 27 publications

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“…On the other hand, the experimental analyses at LEP which studied the angular distribution of final state particles are sensitive to CP-odd TGCs. A comparison between the CP-odd sector of TGC Lagrangian [54,91,92] and our effective Lagrangian (Eq. 2) implies…”

Section: Discussionmentioning

confidence: 99%

Constraints onCP-violating gauge-Higgs operators

et al. 2015

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We consider the most general set of SU (2) × U (1) invariant CP-violating operators of dimension six, which contribute to V V h interactions (V = W, Z, γ). Our aim is to constrain any CP-violating new physics above the electroweak scale via the effective couplings that arise when such physics is integrated out. For this purpose, we use, in turn, electroweak precision data, global fits of Higgs data at the Large Hadron Collider and the electric dipole moments of the neutron and the electron. We thus impose constraints mainly on two-parameter and three-parameter spaces. We find that the constraints from the electroweak precision data are the weakest. Among the existing Higgs search channels, considerable constraints come from the diphoton signal strength. We note that potential contribution to h → γZ may in principle be a useful constraining factor, but it can be utilized only in the high energy run. The contributions to electric dipole moments mostly lead to the strongest constraints, though somewhat fine-tuned combinations of more than one parameter with large magnitudes are allowed. We also discuss constraints on gauge boson trilinear couplings which depend on the parameters of the CP-violating operators .Although the discovery of "a Higgs-like boson" at the Large Hadron Collider (LHC) has been a refreshing development [1,2], there is no clear signal yet for physics beyond the standard model (SM). It is therefore natural that physicists are trying to wring the last drop out of the Higgs sector itself, in attempts to read fingerprints of new physics.One approach is to examine all available data in terms of specific new models, such as supersymmetry or just additional Higgs doublets. In the other approach, one can take a model-independent stance, parametrize possible modifications of the interaction terms of the Higgs with pairs of SM particles, and examine them in the light of the available data. Such modifications can again be of two types. In the first category, they are just multiplicative modifications of the coupling strengths, the Lorentz structures remaining the same as in the SM. Constraints on such modifications have already been derived from the available Higgs data [3][4][5][6][7]. In the second class, one considers additional operators with new Lorentz structures satisfying all symmetries of the SM [8][9][10][11][12][13][14][15]. Gauge invariance of such operators in their original forms may be expected, since they are obtained by integrating out new physics that is just above the reach of the present round of experiments. Sets of such higher-dimensional operators contributing to the effective coupling of the Higgs to, say a pair of electroweak vector bosons have been studied extensively. Here it makes sense to include only SU (2) × U (1) invariant operators in one's list to start with, because the yet unknown new physics lies at least a little above the electroweak symmetry breaking scale. A host of such gauge invariant higher-dimensional operators have been, and are being, analyzed with considerable...

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Section: Discussionmentioning

confidence: 99%

Constraints onCP-violating gauge-Higgs operators

et al. 2015

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“…Since no LEP bound is available on the CP-violating TGC coupling δκ γ , at present CP Z Z is an independent variable. However, in the future significant constraints on δκ γ could be obtained from LHC data [19]. All in all, we are left with 3 CPconserving couplings, κ Z Z and γ γ,Z γ , and 3 CP-violating ones, CP γ γ,Z γ,Z Z .…”

Section: Relating Higgs Pseudo-observables To Ew Observablesmentioning

confidence: 99%

Electroweak bounds on Higgs pseudo-observables and $$h\rightarrow 4\ell $$ h → 4 ℓ decays

et al. 2015

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“…Another possibility, which we use here, is to make these correlations even under the interchange of the two proton (beam) momenta. For this purpose we explicitly introduce an additional factor as was done for the study of CP violation in W γ production [17]. The T-odd correlations with the extra factor are given by…”

Section: T-odd Correlations In Pp → W Jmentioning

confidence: 99%

CP violating anomalous couplings in W jet production at the LHC

Valencia

2017

Phys. Rev. D

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T-odd correlations in W j production at the LHC have been studied recently as a way to measure a phase produced by QCD at NLO by Frederix et. al. [1]. That study found that the induced asymmetry could be observed with 20 fb −1 of 8 TeV data. These T-odd asymmetries can also be induced by CP violating new physics interfering with the SM at LO. In this paper we study this possibility using effective Lagrangians to describe the new physics. We find that the leading contribution arises at dimension eight, and that it necessarily introduces flavor changing neutral currents as well. We discuss the constraints that can be placed on the flavor structure of the new physics operator from studies of FCNC in kaon and B meson decays and then compare the T-odd correlations in W j induced by CP violating new physics to those induced by QCD at NLO. We quantify the level at which these couplings can be probed at the LHC, and find that they will not affect a measurement of the NLO QCD phases.

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CPviolating anomalous couplings inWγandZγproduction at the LHC

Cited by 11 publications

References 27 publications

Constraints onCP-violating gauge-Higgs operators

Constraints onCP-violating gauge-Higgs operators

Electroweak bounds on Higgs pseudo-observables and $$h\rightarrow 4\ell $$ h → 4 ℓ decays

CP violating anomalous couplings in W jet production at the LHC

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