Tagged Questions
1
vote
1answer
95 views
What is Transverse Energy?
What is transverse energy? Why we use transverse total energy instead of energy and transverse momentum in place of Total momentum in the particle detectors?
3
votes
1answer
86 views
What algorithms are used for track reconstruction in cloud chambers?
In particular I'm interested in any algorithms that can separate multiple tracks from one another reliably.
4
votes
3answers
89 views
Does a Photon leave trace in a silicon tracker?
I am having this image from ATLAS Detector.
In gray you can see the ATLAS's Si Tracker.In Green you see the Electromagnetic Callorimeter. In red there is the Hadron Callorimeter and in Blue there ...
2
votes
1answer
64 views
Understanding how mass spectroscopy works
Let me start by saying that I've posted this question here as well. I've posted it here because I think the questions I've asked involve the physics of molecules.
So I’m trying to get a deeper ...
3
votes
1answer
50 views
Single electron non-perturbing detector
I am designing an experiment where I need to trigger the release of an electron by a radioactive source (Sr-90).
The easy way to do it is to use a thin scintillator right after the source collimator. ...
6
votes
1answer
53 views
Measuring nucleons using electron beams
sorry if the question is too elementary. From: The Britannica Guide to Particle Physics:
The sizes of atoms, nuclei, and nucleons are measured
by firing a beam of electrons at an appropriate target. ...
1
vote
3answers
94 views
New physics at high energies, cosmic rays, particle-detectors in space
New physics is expected at high energies and cosmic rays have high energies, so have there been or are there any plans to put particle detectors in space to study cosmic rays for new physics ?
3
votes
1answer
113 views
Cloud chamber video showing large particles - What are they?
Watching a video of a cloud chamber on wikipedia (http://en.wikipedia.org/wiki/File:Cloud_chamber.ogg), I cannot help noticing the large collisions that take place at 00:12 and 00:24.
What are ...
3
votes
0answers
86 views
Proton flux model or data at energy range up to 100 keV
I am looking for a model or at best the database of proton fluxes (solar p+) at a energy range of some eV up to 100 keV. I have already found the SOHO database:
http://umtof.umd.edu/pm/
But the ...
3
votes
2answers
2k views
What is p_T? (transverse momentum?)
I've been looking at a few papers in experimental physics (from the ATLAS collaboration, for example) and I've often run across phrases such as "high-p_T electron." What exactly is p_T? Is it simply ...
5
votes
1answer
196 views
What is the smallest distance between a decaying vertex and an interaction point a detector can measure?
A short lived particle is created at the interaction point and then decaying a distance $d$ away, in some detector. My question is what is the smallest distance $d$ that can be measured ...
7
votes
2answers
476 views
What does the data in various stages of analysis from a particle collision look like?
I've been following the news around the work they are doing at the LHC particle accelerator in CERN. I am wondering what the raw data that is used to visualize the collisions looks like. Maybe someone ...
5
votes
1answer
465 views
7 GeV dark matter particle: how particle accelerators missed it?
This posting is regarding the recent confirmation of the DAMA results that might be due to underlying differences in proton and neutron cross section with the dark matter particles, which reflect on ...
1
vote
1answer
111 views
experimental setup to measure Center-Of-Momenta of products from spontaneous radiactive decay
This question is an attempt to complement this other question about fluctuations in radiactive decay.
This question is completely experimental though: in general, suppose i have certain sample of a ...
