This might be a very naive question but I really don't have a proper answer. Why Bosons have integer spins while Fermions have half-integer spins?
In context with electroweak precision tests, Peskin-Takeuchi or oblique or S,T,U parameters are quite familiar. I am looking for some references where these things are nicely explained (I have...
05 June 2018 4,368 0 View
As we know, the observed mass of a particle is the sum of the bare mass and the quantum corrections. Physically, how can I understand bare mass? Is it the mass at the tree level?
05 June 2017 2,474 1 View
In the book 'Particle Dark Matter: Observations, Models and Searches' by Gianfranco Bertone I came across the following statement: '...the sea quarks and gluons do not contribute to the vector...
03 April 2017 3,504 11 View
Majorana fermions do not have vector interaction and hence there is no spin-independent direct search cross section for majorana like WIMPs. Can anyone please show me the proof ?
03 April 2017 5,742 3 View
For a Vector Boson DM, I have the following spin-independent direct detection (scattering) cross-section with nucleus (please see the attahced file), where n_n and n_p are the number of nucleons...
02 March 2017 4,266 4 View
How can I obtain the DM DM -> SM SM annihilation cross section if the DM effective operator is given? It would be really helpful if someone can show me the detail derivation.
02 March 2017 3,458 4 View
In collider physics I have frequently come across H_T cut over jet momenta. How do we define this quantity and what is the physical reason for applying this apart from missing energy cut?
01 February 2017 8,806 3 View
I have a Feynman graph in t-channel with vector (X)-scalar(\phi)-scalar(\phi) vertex. Can someone please help me to find out what is the vertex factor for such a process and how can I calculate...
31 December 2016 7,721 4 View
In two Higgs doublet model (2HDM), how the W and Z bosons get mass? I am specifically looking for Type II 2HDM case.
31 December 2016 1,176 8 View
We know that ${\gamma_{mu},\gamma_{nu}}$= 2 $g_{\mu\nu}$, where $g_{\mu\nu}$ is the flat metric . That shows spinors are someway related to the metric of space. Can anyone please explain how?
08 September 2016 9,956 3 View
I did PR spin coating on trench structure. I used AZ P4620 PR and the thickness or PR is around 11um. The substrate is Si. And my trench structure depth is 141um(negative way). Even though I...
08 August 2024 2,298 0 View
If we map as a continuous motion an ionising electron (beginning its journey at n=1) in an H atom, a specific hyperbolic spiral appears (see animation). When we solve this spiral formula, we find...
07 August 2024 5,343 2 View
Let's say we have a standard, regular hexagonal honeycomb with a 3-arm primitive unit cell (something like the figure attached; the figure is only representative and not drawn to scale). The...
07 August 2024 1,937 1 View
The stability of the Solar System is a complex subject that blends the classical framework of Newtonian mechanics with the modern insights provided by General Relativity (GR). Understanding this...
07 August 2024 2,569 1 View
Hello, everyone. I have tried to determine carrier motilities of some materials, by Density Functional Theory, using Quantum ESPRESSO. There are a few methods to do it, like a package called...
04 August 2024 8,894 1 View
average particle size calculation from TEM
04 August 2024 2,921 1 View
TEP presentation caption (The Environmental Project) Re: Why should Washington’s DC, or any country government point of location think of as nowadays of as to being 'tomorrow as to come! if it...
03 August 2024 2,484 1 View
Dear Researchers I need to know, how to load and plot 2D-PIV (particle image velocimetry) recorded velocity vector field data in Tecplot? Thank You
02 August 2024 3,615 1 View
I am currently using CASTEP version 2020. When I want to run optical properties calculations with spin-orbit coupling(SOC), I encounter the following error in a pop-up window before the job gets...
02 August 2024 2,890 0 View
The delta function seems produce logical contradictions when analyzed on a fundamental level. I would be curious if anyone else agrees.
31 July 2024 10,109 3 View