Related Experiment Video
Updated: Jul 31, 2026
07:46
Setting Limits on Supersymmetry Using Simplified Models
Published on: November 16, 2013
Constraining Light-Quark Yukawa Couplings from Higgs Distributions
Fady Bishara1, Ulrich Haisch1,2, Pier Francesco Monni1
1Rudolf Peierls Centre for Theoretical Physics, University of Oxford, OX1 3NP Oxford, United Kingdom.
Physical Review Letters
|April 8, 2017
Summary
This study introduces a new method to measure Higgs boson couplings to bottom and charm quarks using Large Hadron Collider (LHC) data. The approach enhances sensitivity by analyzing Higgs production, offering improved constraints on fundamental particle physics.
Area of Science:
- High Energy Physics
- Particle Physics
- Quantum Field Theory
Background:
- The Standard Model of particle physics describes fundamental particles and forces.
- Yukawa couplings quantify the interaction strength between fermions and the Higgs boson.
- Precise measurement of these couplings is crucial for testing the Standard Model and searching for new physics.
Purpose of the Study:
- To propose a novel strategy for constraining bottom and charm Yukawa couplings.
- To enhance sensitivity to these couplings beyond existing methods.
- To explore the potential for bounding the strange Yukawa coupling.
Main Methods:
- Exploiting Large Hadron Collider (LHC) measurements of transverse momentum distributions in Higgs production.
- Utilizing differential Higgs spectra distortions caused by quark-initiated processes and quark loop emissions.
- Avoiding the need for exclusive final state reconstruction or heavy-flavor tagging.
Main Results:
- Derived constraints on bottom and charm Yukawa couplings using LHC Run I data.
- Demonstrated enhanced sensitivity compared to previous proposals.
- Investigated the prospects for future LHC runs and potential bounds on the strange Yukawa coupling.
Conclusions:
- The proposed method offers a powerful new tool for probing Yukawa couplings at the LHC.
- This approach provides improved precision for fundamental parameters of the Standard Model.
- Future LHC data will further refine these constraints and potentially reveal new physics.
Related Concept Videos
01:08Spin–Spin Coupling Constant: Overview
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must have a...
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must have a...
01:20Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
01:21Energy Associated With a Charge Distribution
The work done to bring a charge through a distance r is given by the potential difference between the initial and the final position. To assemble a collection of point charges, the total work done can be expressed in terms of the product of each pair of charges divided by their separation distance, defined with respect to a suitable origin. Solving this expression gives the energy stored in a point charge distribution.
01:23Equilibrium Conditions for a Particle
When an object is in equilibrium, it is either at rest or moving with a constant velocity. There are two types of equilibrium: static and dynamic. Static equilibrium occurs when an object is at rest, while dynamic equilibrium occurs when an object is moving with a constant velocity. In both cases, there must be a balance of forces acting on the object.
To understand the concept of equilibrium, let us first consider the forces acting on an object. When different forces act on an object, they can...
To understand the concept of equilibrium, let us first consider the forces acting on an object. When different forces act on an object, they can...
01:12Fermi Level Dynamics
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
01:16Conservation of Mass in Finite Cotrol Volume
The principle of conservation of mass is a fundamental law in fluid mechanics and is applied using the continuity equation. We apply the concept to a finite control volume to derive the continuity equation.
A system is defined as a collection of unchanging contents, and the conservation of mass states that a system's mass is constant.
A system is defined as a collection of unchanging contents, and the conservation of mass states that a system's mass is constant.