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  • Masses, Mixings, Yukawa Couplings and their Symmetries

    2009-4-20 · The method leads naturally to a classi cation of Yukawa couplings accord-ing to their symmetries and suggests a new parametrization of masses and mixings that is useful to study the behaviour of Yukawa couplings under the renormalization …

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  • A new method for measuring the bottom quark Yukawa ...

    2017-11-4 · A new method for measuring the bottom quark Yukawa coupling at the CERN Large Hadron Collider D. Rainwater Theoretical Physics Department, Fermilab, P.O. Box 500, Batavia, IL 60510 We propose a new method for measuring the bottom quark Yukawa coupling at the LHC. Higgs boson produc-tion in purely electroweak WHjjevents is calculated. The

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  • Testing the supersymmetric QCD Yukawa coupling in

    In order to establish supersymmetry (SUSY) at future colliders, the identity of gauge couplings and the corresponding Yukawa couplings between gauginos, sfermions and fermions needs to be verified. A first phenomenological study for determining the Yukawa coupling of the SUSY-QCD sector is presented here, using a method which combines information from LHC and ILC.

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  • Testing the supersymmetric QCD Yukawa coupling in

    A first phenomenological study for determining the Yukawa coupling of the SUSY-QCD sector is presented here, using a method which combines information from LHC and ILC. In order to establish supersymmetry (SUSY) at future colliders, the identity of gauge couplings and the corresponding Yukawa couplings between gauginos, sfermions and fermions needs to be verified.

    Get Price
  • Masses, mixings, Yukawa couplings and their

    1993-5-6 · The method leads naturally to a classification of Yukawa couplings according to their symmetries and suggests a new parametrization of masses and mixings that is useful to study the behaviour of Yukawa couplings under the renormalization group.

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  • Determining the SUSY-QCD Yukawa coupling -

    Here a first phenomenological study for determining this coupling is presented, using a method which combines information from LHC and ILC. Among the firm predictions of softly broken supersymmetry is the identity of gauge couplings and the corresponding Yukawa couplings …

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  • Determining the SUSY-QCD Yukawa coupling —

    Among the firm predictions of softly broken supersymmetry is the identity of gauge couplings and the corresponding Yukawa couplings between gauginos, sfermions and fermions. In the event that a SUSY-like spectrum of new particles is discovered at future colliders, a key follow-up will be to test these relations experimentally.

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  • The Contribution from Neutrino Yukawa Couplings to

    2004-5-24 · In this class of models with universal soft supersymmetry breaking interactions,the flavor and CP violation due to the neutrino Yukawa couplings is computed byintegrating out the right-handed neutrinoNi superfields. This particular model hasbeen studied in a number of papers, beginning with. In particular, the contributionof neutrino Yukawa couplings to lepton EDMs has been studiedin this …

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  • Approximate Analytic Solutions of RG Equations for

    each propagator entering into the Yukawa vertex. Then, one has the following expressions for the Yukawa couplings: Y t = Y t0E t [1+A(Y t0F t +Y b0F b)] 1/A[1+2BY t0F t] 1/B[1+3CY t0F t] 1/C, 1 A + 1 B + 1 C =1 Y b = Y b0E b [1+A(Y t0F t +Y b0F b)] 1/A[1+2BY b0F b] 1/B[1+C(3Y b0F b +Y τ0F τ)] 1/C, Y τ = Y τ0E τ [1+A′Y τ0F τ] 1/A′[1+2B′Y τ0F τ] 1/B′[1+C(3Y b0F b +Y τ0F τ)] 1/C, 1 A′ + 1 B′ + 1 C =1

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  • A new method for measuring the bottom quark Yukawa ...

    2017-11-4 · the spin and couplings, which must be SU(2) gauge couplings to the weak bosons and Yukawa couplings to fermions, proportional to the mass of the fermion. At the LHC, it will be fairly straightforward to deter-mine the spin [3] as well as to extract the gauge cou-plings [4]. Measuring the Yukawa couplings is more di cult.

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  • Yukawa coupling in nLab

    In order to establish supersymmetry (SUSY) at future colliders, the identity of gauge couplings and the corresponding Yukawa couplings between gauginos, sfermions and fermions needs to be verified. A first phenomenological study for determining the Yukawa coupling of the SUSY-QCD sector is presented here, using a method which combines information from LHC and ILC.

    Get Price
  • Testing the supersymmetric QCD Yukawa coupling in

    2004-11-29 · Yukawa interaction or a Yukawa coupling and g is called a Yukawa coupling constant. To be a useful theory, a theory must be renormalizable. It means when one com- putes amplitudes (evaluated perturbatively via Feynrnan diagrams) one must obtain an answer in which all divergences can be absorbed into the couplings, masses and

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  • The Yukawa Coupling in Three Dimensions

    1993-5-6 · Physics Letters B 305 (1993) 90-97 North-Holland Masses, mixings, Yukawa couplings and their symmetries Arcadi Santamaria 1 CERN, Geneva, Switzerland Received 26 February 1993 PHYSICS LETTERS B We present a method to find the number of real and imaginary observable parameters coming from the Yukawa sector in an arbitrary gauge theory.

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  • Masses, mixings, Yukawa couplings and their

    2006-6-10 · Among the firm predictions of softly broken supersymmetry is the identity of gauge couplings and the corresponding Yukawa couplings between gauginos, sfermions and fermions. In the event that a SUSY-like spectrum of new particles is discovered at future colliders, a key follow-up will be to test these relations experimentally. In detailed studies it has been found that the SUSY-Yukawa ...

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  • [hep-ph/0606121] Determining the SUSY-QCD

    1993-10-25 · A general method of computing string corrections to the Kähler metric and Yukawa couplings is developed at the one-loop level for a general compactifi…

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  • Superstring threshold corrections to Yukawa couplings

    2021-7-3 · model Yukawa couplings of type. 10 10 5. H, which are known to be absent perturbatively [27]. In the second part of the letter we provide a globally consistent intersecting. D. 6-brane model and show that an. E. 2-instanton generates a mass term for certain matter fields, thus providing a new mechanism for decoupling exotic matter. SU. 5 ...

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  • Nonperturbative Yukawa Couplings from String Instantons

    2021-7-7 · ABSTRACT: Search for CP mixing in the Higgs sector is well-motivated given the large matter-antimatter asymmetry in Universe that cannot be explained by the Standard Model. While the CP properties of Higgs boson interaction with gauge bosons have been explored since Higgs boson discovery, direct constraints on CP mixing in fermion Yukawa couplings were not available until last …

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  • Study of CP properties of top Yukawa coupling with

    2017-11-7 · obtained several possible scenarios for the GU scale Yukawa couplings. 2 Quark masses and mixings at 1 GeV As already mentioned, the hierarchy observed in low energy values of quark masses and mixings can be used as a guide to search for the structure of quark Yukawa couplings. This hierarchy can be better appreciated by using

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  • The Yukawa Coupling in Three Dimensions

    2004-11-29 · Yukawa interaction or a Yukawa coupling and g is called a Yukawa coupling constant. To be a useful theory, a theory must be renormalizable. It means when one com- putes amplitudes (evaluated perturbatively via Feynrnan diagrams) one must obtain an answer in which all divergences can be absorbed into the couplings, masses and

    Get Price
  • Yukawa Couplings in Heterotic Compactification |

    2010-3-19 · We present a practical, algebraic method for efficiently calculating the Yukawa couplings of a large class of heterotic compactifications on Calabi-Yau three-folds with non-standard embeddings. Our methodology covers all of, though is not restricted to, the recently classified positive monads over favourable complete intersection Calabi-Yau three-folds. Since the algorithm is based on ...

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  • Emperically Derived Fermion Higgs Yukawa Couplings

    2017-11-23 · Emperically Derived Fermion Higgs Yukawa Couplings and Pole Masses Kevin Loch⇤ (Dated: 23 November, 2017) Empirically derived formulas are proposed for calculating the Higgs field Yukawa couplings and pole masses of the twelve known fundamental fermions with experimental inputs m e, m µ and the Fermi constant G0 F.

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  • [1606.09253] Constraining Light-Quark Yukawa

    2016-6-30 · Compared to other proposals it leads to an enhanced sensitivity to the Yukawa couplings due to distortions of the differential Higgs spectra from emissions which either probe quark loops or are associated to quark-initiated production. We derive constraints using data from LHC Run I, and we explore the prospects of our method at future LHC runs.

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  • Yukawa couplings and quark and lepton masses in an

    2020-11-3 · II. YUKAWA COUPLINGS FROM 16M 144H 45M AND 16M 144H 120M An explicit analysis of these couplings relies on oscil-lator method [3] with special techniques developed in [1,2,4,5](for an alternative technique see [6]). Here we discuss the result of the analysis without going into the details of the computation. To show that the couplings of Eq.

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  • Non-minimal coupling in Higgs–Yukawa model with ...

    2016-5-16 · We study the fixed-point structure of the Higgs–Yukawa model, with its scalar being non-minimally coupled to the asymptotically safe gravity, using the functional renormalization group. We have obtained the renormalization group equations for the cosmological and Newton constants, the scalar mass squared and quartic coupling constant, and the ...

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  • Local B-model Yukawa couplings from A-twisted

    Abstract. Using the exact formula for the A-twisted correlation functions of the 2D |mathcal{N}=(2,2)| gauged linear sigma model, we reconsider the computation of the B-model Yukawa couplings of the local toric Calabi–Yau varieties. Our analysis is based on an exact result that has been evaluated from the supersymmetric localization technique and careful treatment of its application.

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  • Review Article Higgs-Yukawa Model in Chirally Invariant ...

    2019-7-31 · Higgs-Yukawa Model in Chirally Invariant Lattice Field Theory ... using the method in [ ]. 2. Lattice Setting and Simulation Strategy.. e Action. e Euclidean action of the continuum Higgs-Yukawa model containing one doublet of fermions, ... otherwise, the Yukawa couplings 0 and 0

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  • Exploring CP phase in τ-lepton Yukawa coupling in Higgs ...

    2019-10-8 · tau-lepton Yukawa couplings are estimated at 13TeV LHC with 1000fb−1 of integrated luminosity. We also present a novel way to reconstruct τ momen-tum at the LHC utilizing the information of impact parameter. Finally, we obtain that the asymmetries can be as large as 35% for a case of maximal CP violation in the τ Yukawa couplings.

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  • standard model - Technical naturalness of Yukawa

    2021-6-7 · 11. Top's Yukawa coupling of order one is technically natural, the much smaller couplings are not natural. One may find this problem discussed under the term 'hierarchy of Yukawa couplings'. The previous paragraph really says that the Standard Model doesn't have any mechanism to explain the smallness of any non-top Yukawa couplings.

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  • Charm and bottom Yukawa couplings: experimental

    2017-11-3 · Deviations in the Yukawa couplings would be an indication of new physics The decay channel ത ҧprovides an important way to probe the yukawa coupling for b/c quarks ത: •Dominant contribution to the total decay width (highest branching ratio - 58%) •Searched for …

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  • Realistic Yukawa couplings through instantons in ...

    [en] The Yukawa couplings of the simpler models of D-branes on toroidal orientifolds suffer from the so-called ''rank one'' problem-there is only a single non-zero mass and no mixing. We consider the one-loop contribution of E2-instantons to Yukawa couplings on intersecting D6-branes, and show that they can solve the rank one problem.

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  • standard model - Yukawa Couplings of Fermions to

    2021-2-16 · Yukawa Couplings of Fermions to Higgs Field. g f = 2 m f v. Question: In his book 'Modern Particle Physics', Mark Thomson writes on page 486: Interestingly, for the top quark with m t ∼ 173.5 ± 1.0 GeV, the Yukawa coupling is almost unity. Whilst this may be a coincidence, it is perhaps natural that the Yukawa couplings of the fermions are O ...

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  • Local B-model Yukawa couplings from A-twisted

    Abstract. Using the exact formula for the A-twisted correlation functions of the 2D |mathcal{N}=(2,2)| gauged linear sigma model, we reconsider the computation of the B-model Yukawa couplings of the local toric Calabi–Yau varieties. Our analysis is based on an exact result that has been evaluated from the supersymmetric localization technique and careful treatment of its application.

    Get Price
  • (PDF) UCLA Generalized Yukawa couplings and Matrix

    In this paper we work out the details of the matrix model and the gauge theory for the ˜ QΦn Q coupling. With these results as a starting point, we then outline how a polynomial of generalized Yukawa couplings QP ˜ (Φ)Q can be analyzed. We find complete agreement between the matrix model with one boundary and the gauge theory.

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  • Higgs Pair Production as a Signal of Enhanced Yukawa

    Higgs Pair Production as a Signal of Enhanced Yukawa Couplings Phys Rev Lett. 2018 Jul 13;121(2):021801. doi: 10.1103/PhysRevLett.121.021801. Authors Martin Bauer 1 , Marcela Carena 2 3 4 , Adrián Carmona 5 Affiliations 1 Institut für Theoretische Physik ...

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  • Computing Yukawa couplings from

    Computing Yukawa couplings from magnetized extra dimensions Daniel Cremades, Luis E. Ibáez and Fernando Marchesano-S-duality, deconstruction and confinement for a marginaldeformation of SUSY Yang-Mills Nick Dorey-D3/D7 brane inflation and semilocal strings Keshav Dasgupta, Jonathan P. Hsu, Renata Kallosh et al.-Recent citations

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  • Supersymmetry Unification Predictions for M_top

    Next, we evolve the Yukawa couplings using two-loop RGEs, starting from the experimental values of the quark and lepton masses at the weak scale and imposing unification of bottom–tau Yukawa couplings at M G U T within 5 %. Matching conditions at M S U S Y are well known in the MSSM.

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  • Four-Loop Gauge and Three-Loop Yukawa Beta

    2021-7-20 · We present the beta functions of gauge and Yukawa couplings in general four-dimensional quantum field theory, at four and three loops, respectively. The essence of our approach is fixing unknown coefficients in the most general ansatz for beta functions by direct calculation in several simplified models. We apply our results to the standard model and its extension with an arbitrary …

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  • Exploring CP phase in τ-lepton Yukawa coupling in Higgs ...

    2019-10-8 · tau-lepton Yukawa couplings are estimated at 13TeV LHC with 1000fb−1 of integrated luminosity. We also present a novel way to reconstruct τ momen-tum at the LHC utilizing the information of impact parameter. Finally, we obtain that the asymmetries can be as large as 35% for a case of maximal CP violation in the τ Yukawa couplings.

    Get Price
  • Yukawa couplings and quark and lepton masses in an

    We propose a new method for measuring the H -> bb rate at the CERN LHC in a manner which would allow extraction of the b quark Yukawa coupling. Higgs boson production in purely electroweak WHjj events is calculated.

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  • Generalized Yukawa couplings and matrix models —

    2020-11-3 · II. YUKAWA COUPLINGS FROM 16M 144H 45M AND 16M 144H 120M An explicit analysis of these couplings relies on oscil-lator method [3] with special techniques developed in [1,2,4,5](for an alternative technique see [6]). Here we discuss the result of the analysis without going into the details of the computation. To show that the couplings of Eq.

    Get Price
  • Exclusive window onto Higgs Yukawa couplings.

    2020-8-3 · In this article we investigate U(N) gauge theories with matter in the fundamental and adjoint representations of the gauge group, interacting via generalized Yukawa terms of the form model and the gauge theory descriptions of these theories. The analysis leads to a partial description of the Higgs branch of the gauge theory.

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  • Probing Higgs Yukawa Couplings with Rare Decays ...

    2015-3-13 · We show that both flavor-conserving and flavor-violating Yukawa couplings of the Higgs boson to first- and second-generation quarks can be probed by measuring rare decays of the form hMV, where M denotes a vector meson and V indicates either γ, W or Z. We calculate the branching ratios for these processes in both the standard model and its ...

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  • Supersymmetry Unification Predictions for M_top

    2015-5-13 · sensitivity to both the magnitude and sign of the Yukawa couplings of the Higgs boson to quarks[3Ð6]. These couplings are challenging to access in hadron colliders through the directH! qqø decays, owing to the over-whelming QCD background[7]. Among the channels proposed as probes of the light quark Yukawa couplings[4,6], those with the heavy

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  • Soft Yukawa couplings in supersymmetric theories -

    Next, we evolve the Yukawa couplings using two-loop RGEs, starting from the experimental values of the quark and lepton masses at the weak scale and imposing unification of bottom–tau Yukawa couplings at M G U T within 5 %. Matching conditions at M S U S Y are well known in the MSSM.

    Get Price
  • standard model - Technical naturalness of Yukawa

    Radiatively induced Higgs-fermion couplings have non-trivial momentum-dependent form factors, which at low momentum are enhanced with respect to the case of tree-level Yukawa couplings. These form factors may be probed by various sum rules and relations among Higgs boson decay widths and branching ratios to fermion final states.

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  • Unification of gauge and Yukawa couplings - IOPscience

    2021-6-7 · 11. Top's Yukawa coupling of order one is technically natural, the much smaller couplings are not natural. One may find this problem discussed under the term 'hierarchy of Yukawa couplings'. The previous paragraph really says that the Standard Model doesn't have any mechanism to explain the smallness of any non-top Yukawa couplings.

    Get Price
  • quantum field theory - How to determine the number

    2019-7-26 · The Yukawa coupling is enhanced at low energies, showing that a genuine unification of gauge and Yukawa couplings may be achieved. Some other arguments and directions of study are also mentioned to tackle the problem of producing a scalar potential allowing to accommodate the measured Higgs mass at 125 GeV.

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