Read about high energy | 14 Discussions | Page 1

  1. Adams2020

    I The surface area of an oblate ellipsoid

    In "An Introduction to Nuclear Physics by W. N. Cottingham, D. A. Greenwood" for the surface area of an oblate ellipsoid, the following equation is written for small values of ε : The book has said this without proof. I found the following formula for the desired shape: No matter how hard I...
  2. Adams2020

    Mass difference due to electrical potential energy

    I do not really know the relationship between potential energy and mass difference. Isn't the difference in mass of protons and neutrons due to their quarks? (the neutron is made of two down quarks and an up quark and the proton of two up quarks and a down quark.) Please help.
  3. S

    A High energy symmetry breaking and laws of physics?

    In some models of the beginning of the universe, like for example in chaotic inflation, space would stop expanding in some points, creating hubble volumes that could experience different spontaneous symmetry breaking, which would result in different properties, such as different physical...
  4. avnl

    A Calculating the propagator of a Spin-2 field

    Nieuwenhuizen uses a method for calculating the propagator by decomposing the field ## h_{\mu\nu}, ## first into symmetric part ## \varphi_{\mu\nu} ## and antisymmetric part ## \psi_{\mu\nu} ##, and then by a spin decomposition using projector operators. Using this he writes the dynamical...
  5. cordless03

    A High-Energy biophysics?

    Are there any ways particle physics can impact biology? Specifically, being able to use methods from theoretical physics to study biological systems (possible physiology related).
  6. Malek

    B Antiparticles and Cosmology

    There is an assumption in cosmology say that there is another universe Composed of antiparticles? I mean that the atom composed of positron rather than an electron, anti-proton rather than a proton and anti-neutron rather than a neutron.
  7. S

    Struggling to choose my PhD topic

    <Moderator note: Moved from academic guidance to career guidance on Scott92's request. Reason: The question primarily addresses job opportunities in dependence of PhD subject.> Hey everyone, I'm a student who is currently undertaking a Master of Physics (coursework & research) at the...
  8. I

    Quantum QFT: groups, effective action, fiber bundles, anomalies, EFT

    Hi, I am looking for textbooks in QFT. I studied QFT using Peskin And Schroeder + two year master's degree QFT programme. I want to know about the next items: 1) Lorentz group and Lie group (precise adjectives, group representation and connection between fields and spins from the standpoint of...
  9. C

    Relation between operator and experimental action

    Hi I have some questions about operator and experimental action 1, For each experimental action(no matter how trivial or complex), can they ALWAYS be described by some corresponded operator? how to proof? For example, adding some energy to excit a particle can be described in operator language...
  10. M

    I Yuri Milner Breakthrough Starshot - Nano Craft hitting Earth

    I've been doing some work with my classes around the Yuri Milner Breakthrough Starshot project to send a tiny nano craft of mass around a few grams to alpha centauri. The starchip would travel at 20% of the speed of light. I've had them calculating various properties of the ship including...
  11. M

    Phase transition at high energies?

    Hi,I'm new here, and created my account solely for following question: Does the incompatibility between QM and Relativity indicate a phase transition at high energies? (as in: indicate more than a "could be")
  12. Moelf

    How's UC Santa Barbra undergrad in term high-energy physics?

    I'm an applying high school student. I know something about the field so don't worrying talking about the subject itself just assume I know how research works. I want to know how does it feel like to be a student in UCSB physics department if you want to have high-energy particle physics as...
  13. Z

    Will electron create gamma-radiation?

    If we put cathode rod with enormouse voltage in vacuum between strong magnetic fields pointing down paralel to rod end then put electron in it with initial speed equal to speed of light and begin circling around cathode, Will electron make gamma -rays according to synchrotron radiation?
  14. G

    Proton to neutron conversion at relativistic energies

    The reaction p→n+e++νe is common inside nucleus. But it not considered when we talk about free particle and reason is simply given mass of products being larger than reactants. Now my question is if there is a high energy proton having total energy in order of 2 GeV or let it to be 100 GeV (To...