Download e-book for kindle: Beyond Standard Model Collider Phenomenology of Higgs by Marc Christopher Thomas

By Marc Christopher Thomas

ISBN-10: 3319434519

ISBN-13: 9783319434513

ISBN-10: 3319434527

ISBN-13: 9783319434520

This thesis reviews collider phenomenology of physics past the traditional version on the huge Hadron Collider (LHC). It additionally explores intimately complex themes regarding Higgs boson and supersymmetry – essentially the most interesting and well-motivated streams in particle physics. specifically, it unearths a really huge enhancement of a number of Higgs boson construction in vector-boson scattering whilst Higgs couplings to gauge bosons range from these estimated by way of the normal version. The thesis demonstrates that end result of the lack of unitarity, the very huge enhancement for triple Higgs boson creation occurs. it is a actually novel finding.
The thesis additionally reports the consequences of supersymmetric companions of most sensible and backside quarks at the Higgs creation and rot on the LHC, pointing for the 1st time to non-universal changes for 2 major construction tactics of the Higgs boson on the LHC–vector boson fusion and gluon–gluon fusion.
Continuing the exploration of Higgs boson and supersymmetry on the LHC, the thesis extends current experimental research and indicates that for a unmarried decay channel the mass of the head quark superpartner under a hundred seventy five GeV will be thoroughly excluded, which in flip excludes electroweak baryogenesis within the minimum Supersymmetric version. this can be a significant new discovering for the HEP community.
This thesis is especially basically written and the advent and conclusions are available to a large spectrum of readers.

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Additional resources for Beyond Standard Model Collider Phenomenology of Higgs Physics and Supersymmetry

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1 Plot of; a PL (cos θ ∗ ) = 34 (1 − cos2 θ ∗ ), b P+ + P− where P± (cos θ ∗ ) = 38 (1 ± cos θ ∗ )2 Han et al. [12] proposed to directly reconstruct the 4-momenta of the decay products of the gauge bosons. 3) with fL + f− + f+ = 1, thus allowing us to directly measure the proportion of gauge bosons with each polarisation. They showed that the fit is robust against full hadronisation. Doroba et al. [13] proposed a new variable to isolate WL WL scattering in samesign WW production. This variable arose from the observation that WL ’s tend to be emitted at smaller angles with respect to the initial quarks compared to the transversely polarised bosons, and hence the final quarks are more forward.

To find the angle θV of vector boson scattering in the VV mass frame, first of all we find the momenta p1 and p2 of the initial quarks q1 , q2 in the q1 q2 → q3 q4 ZZ process from a) total invariant mass of the final state particles and b) from the total momentum of the final state particle along the z-axis. Then we find two pairs of the final and initial quarks, say, (q1 , q3 ) and (q2 , q4 ) with the minimal angle between them in the centre-of-mass frame. This will give us access to the four momentum of each virtual vector boson, pV1 , pV2 in the initial state: pV1 = q3 − q1 and pV2 = q4 − q2 which along with invariant masses of the final state particles subsequently allows us to calculate the θV angle in 3 These are not identical to the VBF cuts used in Sect.

5) cuts respectively. We can see that as in the VV → VV analysis, the cross section for the Higgsless (red, a = 0) case is larger than for the SM (blue). 5 on this distribution is relatively small, and can be observed in that the difference in cross section between a = 0 and a = 1 becomes greater in the region √ where M4l is large. This is to be expected as a higher M4l translates to a larger s of the vector boson collision, with its associated larger cross-sectional increase the Higgsless case.

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Beyond Standard Model Collider Phenomenology of Higgs Physics and Supersymmetry by Marc Christopher Thomas

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