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High Energy, Nuclear, Particle Physics Forum

Join expert discussion on High Energy, Nuclear, Particle Physics. Properties, relationships, and interactions of subatomic particles. Experimental and theoretical physics of nuclei and elementary particles.

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Why does ψ'' have a lower leptonic branching ratio compared to ψ' and J/ψ?

Apr 14, 2014 · Replies 2 · Apr 14, 2014

Replies: 2

Views: 2K

Spatial distribution of radiation from radioactive elements

Apr 11, 2014 · Replies 9 · Apr 13, 2014

Replies: 9

Views: 3K

What is the distribution of mass in an atomic nucleus?

Apr 10, 2014 · Replies 4 · Apr 12, 2014

Replies: 4

Views: 2K

Why are exited states of an Isotope metastable?

Apr 7, 2014 · Replies 4 · Apr 12, 2014

Replies: 4

Views: 3K

Neutrinos incident on target - interaction with nucleons or nuclei?

Apr 11, 2014 · Replies 3 · Apr 12, 2014

Replies: 3

Views: 2K

Pion Decay into Gamma rays angle

Apr 10, 2014 · Replies 2 · Apr 11, 2014

Replies: 2

Views: 4K

Virtual bosons and conservation of energy

Apr 5, 2014 · Replies 6 · Apr 11, 2014

Replies: 6

Views: 3K

Penguin diagrams and CP violation

Apr 10, 2014 · Replies 6 · Apr 11, 2014

Replies: 6

Views: 3K

Conserved charge from Lorentz symmetry

Apr 11, 2014 · Replies 5 · Apr 11, 2014

Replies: 5

Views: 3K

Baryon Multiplets and quark content

Apr 10, 2014 · Replies 3 · Apr 10, 2014

Replies: 3

Views: 4K

Why EM and weak interaction are unified

Apr 10, 2014 · Replies 2 · Apr 10, 2014

Replies: 2

Views: 2K

Pair Production, electron and positron from isolated photon

Apr 10, 2014 · Replies 10 · Apr 10, 2014

Replies: 10

Views: 5K

When determining if a decay is possible, is there a method to use?

Apr 9, 2014 · Replies 6 · Apr 10, 2014

Replies: 6

Views: 2K

Photon helicity: Wigner's unitary rep. of Poincare group and gauge symmetry

Oct 15, 2012 · Replies 67 · Apr 9, 2014

3

Replies: 67

Views: 12K

How to Determine the Range of Strong and Weak Interaction

Apr 9, 2014 · Replies 4 · Apr 9, 2014

Replies: 4

Views: 4K

Understanding Color Factors in Eq. 8.45-8.46

Apr 8, 2014 · Replies 2 · Apr 9, 2014

Replies: 2

Views: 2K

How Does Chiral Symmetry Breakdown Influence Meson Mass Differences?

Apr 9, 2014 · Replies 1 · Apr 9, 2014

Replies: 1

Views: 2K

Proving the "Thread Change: Spinor Identity

Apr 8, 2014 · Replies 3 · Apr 8, 2014

Replies: 3

Views: 2K

Counting degrees of freedom for Goldstone bosons

Apr 6, 2014 · Replies 10 · Apr 7, 2014

Replies: 10

Views: 5K

Rules of Parity and Charge Conjugation Parity

Apr 5, 2014 · Replies 1 · Apr 5, 2014

Replies: 1

Views: 3K

Possible decays of buttomonium

Apr 5, 2014 · Replies 2 · Apr 5, 2014

Replies: 2

Views: 3K

Is the point of QFTs that we can 'derive' particles?

Apr 4, 2014 · Replies 9 · Apr 5, 2014

Replies: 9

Views: 2K

Why only delayed neutrons matter ?

Apr 3, 2014 · Replies 7 · Apr 4, 2014

Replies: 7

Views: 5K

How Do Ionization and Radiation Energy Loss Differ in Materials?

Mar 24, 2014 · Replies 3 · Apr 4, 2014

Replies: 3

Views: 3K

Breit-Wigner Distribution: What is it & How is it Used?

Mar 18, 2014 · Replies 7 · Apr 3, 2014

Replies: 7

Views: 3K

Beta Decay Q&A: Quarks, W Bosons & More

Apr 1, 2014 · Replies 8 · Apr 2, 2014

Replies: 8

Views: 3K

Unveiling the Mystery of Proton Spin

Mar 25, 2014 · Replies 14 · Apr 2, 2014

Replies: 14

Views: 3K

Zero dipole moment in stationary state?

Apr 2, 2014 · Replies 1 · Apr 2, 2014

Replies: 1

Views: 3K

Particle Decay: Radioactivity & Reversibility

Mar 30, 2014 · Replies 6 · Mar 31, 2014

Replies: 6

Views: 3K

Pauli exclusion regarding nucleons

Mar 31, 2014 · Replies 1 · Mar 31, 2014

Replies: 1

Views: 2K

Why Is Carbon-14 Radioactive Despite Its Small Nucleus Size?

Mar 30, 2014 · Replies 6 · Mar 30, 2014

Replies: 6

Views: 2K

Doubt on sign of the propagator on Peskin

Mar 26, 2014 · Replies 3 · Mar 29, 2014

Replies: 3

Views: 2K

Feynman diagram for radiative transition

Mar 29, 2014 · Replies 1 · Mar 29, 2014

Replies: 1

Views: 2K

Spontaneous symmetry breaking and the photon/baryon ratio

Mar 19, 2014 · Replies 5 · Mar 29, 2014

Replies: 5

Views: 3K

How can majorana neutrinos still be CP violating?

Mar 23, 2014 · Replies 4 · Mar 29, 2014

Replies: 4

Views: 3K

Fierz Identity Question: Understanding the Transformation and Matrices

Mar 27, 2014 · Replies 2 · Mar 27, 2014

Replies: 2

Views: 3K

Is the higgs boson the mediator of the higgs field?

Dec 21, 2013 · Replies 31 · Mar 26, 2014

2

Replies: 31

Views: 8K

Poll

Source of Energy in a Fission Reaction

Mar 24, 2014 · Replies 6 · Mar 25, 2014

Replies: 6

Views: 5K

Feynman diagram for pair annihilation

Mar 24, 2014 · Replies 5 · Mar 25, 2014

Replies: 5

Views: 4K

Why can't we detect neutrino-antineutrino annihilation?

Mar 23, 2014 · Replies 11 · Mar 25, 2014

Replies: 11

Views: 4K

Are Neutrinos the Missing Dark Matter?

Mar 21, 2014 · Replies 9 · Mar 24, 2014

Replies: 9

Views: 2K

Can dyons be broken down into scalar and pseudoscalar components?

Mar 23, 2014 · Replies 2 · Mar 23, 2014

Replies: 2

Views: 3K

E.o.m. for a particle in a sphere of dust

Mar 23, 2014 · Replies 1 · Mar 23, 2014

Replies: 1

Views: 1K

A question about Feynman diagrams

Feb 27, 2014 · Replies 15 · Mar 22, 2014

Replies: 15

Views: 4K

Can We Consider Elementary Particles and Gravity Without a Minkowski Metric?

Mar 22, 2014 · Replies 7 · Mar 22, 2014

Replies: 7

Views: 2K

Why massless particle can only have two helicity states?

Mar 21, 2014 · Replies 4 · Mar 21, 2014

Replies: 4

Views: 6K

A manifesto on gauge invariance - how am I wrong?

Mar 7, 2014 · Replies 11 · Mar 20, 2014

Replies: 11

Views: 3K

Conservation of angular momentum in nuclear physics

Mar 18, 2014 · Replies 2 · Mar 19, 2014

Replies: 2

Views: 2K

Electron-Muon Scattering Cross Section

Mar 18, 2014 · Replies 2 · Mar 19, 2014

Replies: 2

Views: 4K

Energy of Particle: How to Calculate Joules from Temp

Mar 8, 2012 · Replies 9 · Mar 18, 2014

Replies: 9

Views: 3K

Gauge invariance Vs. Gauge covariance

Jun 6, 2012 · Replies 14 · Mar 17, 2014

Replies: 14

Views: 10K

Hamiltonian formulation of QCD and nucleon mass

Mar 14, 2014 · Replies 2 · Mar 15, 2014

Replies: 2

Views: 2K

Why Study Hadron Physics and the Decay Constant of Mesons?

Mar 14, 2014 · Replies 1 · Mar 14, 2014

Replies: 1

Views: 2K

Where do the initial neutrons come from?

Mar 12, 2014 · Replies 5 · Mar 13, 2014

Replies: 5

Views: 7K

Matter Vs. Antimatter-They have reversed charge, but sadly not reverse gravity.

Jan 30, 2013 · Replies 26 · Mar 11, 2014

Replies: 26

Views: 7K

Particle Physics Table: Find All Particles & Properties

Mar 11, 2014 · Replies 4 · Mar 11, 2014

Replies: 4

Views: 3K

Furry's theorem and soft bremsstrahlung

Mar 11, 2014 · Replies 2 · Mar 11, 2014

Replies: 2

Views: 4K

Why we use the trace calculation?

Mar 11, 2014 · Replies 2 · Mar 11, 2014

Replies: 2

Views: 2K

Feynman diagrams with odd number of vertices.

Mar 10, 2014 · Replies 4 · Mar 11, 2014

Replies: 4

Views: 4K

How to determine the decay mode probability of a pion

Mar 7, 2014 · Replies 8 · Mar 9, 2014

Replies: 8

Views: 4K

Centre of mass frame in nuclear reactions?

Mar 7, 2014 · Replies 6 · Mar 8, 2014

Replies: 6

Views: 4K

Minimal subtraction vs Momentum subtraction schemes

Mar 6, 2014 · Replies 9 · Mar 7, 2014

Replies: 9

Views: 6K

Advanced : HQET Derivative manipulation

Feb 13, 2014 · Replies 1 · Mar 6, 2014

Replies: 1

Views: 2K

Plasma Multipactor by Gene Meeks: Self-Sustaining Power Device?

Mar 6, 2014 · Replies 2 · Mar 6, 2014

Replies: 2

Views: 2K

Orbital quantum number in the shell model

Mar 5, 2014 · Replies 2 · Mar 6, 2014

Replies: 2

Views: 2K

Difference between heavy and light mesons

Mar 5, 2014 · Replies 2 · Mar 6, 2014

Replies: 2

Views: 2K

Why don't dark matter and other such particles hit us?

Feb 22, 2014 · Replies 15 · Mar 5, 2014

Replies: 15

Views: 3K

Have Quark Collision Experiments Revealed the Nature of Matter?

Feb 6, 2014 · Replies 7 · Mar 4, 2014

Replies: 7

Views: 3K

Why is Planck time scaled by c^5?

Mar 1, 2014 · Replies 6 · Mar 2, 2014

Replies: 6

Views: 4K

Stimulated virtual W+, W- when supernova core-> neutron star?

Mar 2, 2014 · Replies 1 · Mar 2, 2014

Replies: 1

Views: 2K

Relative Momentum of Quarks in Mesons at Center of Mass Frame

Feb 10, 2014 · Replies 7 · Feb 27, 2014

Replies: 7

Views: 3K

Dimension of n-point Green function

Feb 23, 2014 · Replies 3 · Feb 26, 2014

Replies: 3

Views: 3K

How Can Lone Quarks Exist in a Color-Neutral Quark-Gluon Plasma?

Feb 21, 2014 · Replies 44 · Feb 26, 2014

2

Replies: 44

Views: 11K

Spontaneous symmetry breaking in the standard model

Feb 25, 2014 · Replies 4 · Feb 25, 2014

Replies: 4

Views: 3K

Binding Energy: Why Does Deuterium Have 1 MeV?

Feb 25, 2014 · Replies 5 · Feb 25, 2014

Replies: 5

Views: 2K

Adjust parameters of Standard Model so only photons, e-, e+ remain?

Feb 23, 2014 · Replies 6 · Feb 25, 2014

Replies: 6

Views: 2K

The Higgs field (mechanism) is the cause of fictitious forces?

Feb 24, 2014 · Replies 2 · Feb 25, 2014

Replies: 2

Views: 2K

Can lead shielding block beta particles?

Feb 24, 2014 · Replies 3 · Feb 24, 2014

Replies: 3

Views: 2K

Neutrino beam passes through optics lens, focus the neutrinos?

Feb 23, 2014 · Replies 2 · Feb 24, 2014

Replies: 2

Views: 2K

QCD Feynman Diagrams: Understanding Particle Interactions

Feb 23, 2014 · Replies 7 · Feb 23, 2014

Replies: 7

Views: 3K

Nuclear explosion and black holes

Feb 5, 2014 · Replies 7 · Feb 21, 2014

Replies: 7

Views: 4K

What Are the Different Origins of Helium?

Feb 17, 2014 · Replies 10 · Feb 20, 2014

Replies: 10

Views: 5K

Do Electrons and Positrons Have a Finite Lifetime?

Jul 1, 2012 · Replies 19 · Feb 20, 2014

Replies: 19

Views: 9K

Diagram of relative strengths of fundamental forces

Feb 14, 2014 · Replies 2 · Feb 19, 2014

Replies: 2

Views: 3K

How can we say a particle is a particle or an antiparticle

Jan 12, 2014 · Replies 14 · Feb 17, 2014

Replies: 14

Views: 5K

How is energy released in nuclear fission?

Feb 14, 2014 · Replies 16 · Feb 15, 2014

Replies: 16

Views: 8K

What Are the Current Insights on Various Fusion Technologies Like Sonofusion?

Jan 9, 2013 · Replies 21 · Feb 11, 2014

Replies: 21

Views: 6K

Lorentz transformation of delta function

Feb 8, 2014 · Replies 4 · Feb 10, 2014

Replies: 4

Views: 6K

List of Charge Conjugation and Parity numbers

Feb 9, 2014 · Replies 3 · Feb 10, 2014

Replies: 3

Views: 4K

Proton-proton inelastic cross section in MeV

Feb 6, 2014 · Replies 6 · Feb 8, 2014

Replies: 6

Views: 3K

Two questions about the binding energy chart?

Feb 8, 2014 · Replies 5 · Feb 8, 2014

Replies: 5

Views: 4K

Why is goldstone's theorem incorrect in gauge theories?

Feb 7, 2014 · Replies 3 · Feb 8, 2014

Replies: 3

Views: 3K

Can better technologies overcome the size limitations of particle accelerators?

Feb 6, 2014 · Replies 5 · Feb 7, 2014

Replies: 5

Views: 5K

Why is the strength of weak nuclear force important ?

Jan 25, 2014 · Replies 7 · Feb 7, 2014

Replies: 7

Views: 5K

SU(2) axial and vector subgroups

Mar 15, 2012 · Replies 9 · Feb 7, 2014

Replies: 9

Views: 7K

Does fusion nuclear reaction produce alpha ridation

Feb 3, 2014 · Replies 8 · Feb 7, 2014

Replies: 8

Views: 2K

Non-canonical terms of scalar fields

Feb 5, 2014 · Replies 1 · Feb 5, 2014

Replies: 1

Views: 3K

Are Dirac Spinors Indicating Two Particles in Your Solution?

Feb 4, 2014 · Replies 1 · Feb 4, 2014

Replies: 1

Views: 3K

Inelastic and elastic scattering and absorption.

Feb 1, 2014 · Replies 3 · Feb 3, 2014

Replies: 3

Views: 5K

What's the relation between Mass Defect and the Strong Nuclear Force?

Feb 1, 2014 · Replies 2 · Feb 1, 2014

Replies: 2

Views: 4K

Particle Physics

Welcome to the Particle Physics forum!

Particle physics is a branch of physics that explores the fundamental constituents of matter and the forces acting upon them at the smallest scales. It involves the study of subatomic particles, such as quarks, leptons, and bosons, and their interactions.

Particle accelerators and detectors are crucial tools in this field, allowing scientists to probe the properties of particles by colliding them at high energies. The Standard Model of particle physics encapsulates our current understanding of these elementary particles and their interactions, but researchers continually seek to expand this framework and explore phenomena such as dark matter and dark energy.

Particle physics plays a central role in unraveling the fundamental nature of the universe, helping us comprehend the building blocks that form all matter and the forces governing their behavior.

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