Hep Definition and 33 Threads

From data of proton-proton collisions at the LHC using the ATLAS detector I have plotted a heatmap of the distribution of satellite clusters (brem and converted photons) around seed clusters (electron/photon candidates without satellites) at (eta, phi) = (0,0). The data I am using is of the...

Hello everyone, I'm soon going to be done with my bachelor's degree, so I am looking for masters to apply to. I am quite interested in pursuing a career in theoretical physics with an interest in particle physics and cosmology. One such master's degree that caught my attention is the degree in...

Hi all, I got my Ph.D. a couple of years back (HEP physics) but for various reasons I never applied for any postdoc positions. I ended up working as a software engineer. It's been alright, it pays the bills, but I really don't give a damn about the work and feel quite unfulfilled and...

I'm reading through Thomson's "Modern Particle Physics", and I've gotten stuck at a point in the derivation of the form factor for electron scattering in a static potential due to an extended charge distribution. It's just a mathematical "trick" i don't quite get. He goes from $$\int\int...

Hello there. I just finished my Bsc. in Engineering Physics+M.eng and I'm about to enter my Msc in Physics (no direct PhD in my country), so I'm choosing which electives to take on my first semester (as my professors suggested me to skip most of the basics). While I entered with the idea to...

Hello, I often hear the phrase "Well, since you are taking a ratio bin-by-bin, you don't have to care about the luminosity syst. uncertainty and the trigger efficiency syst. uncertainty". I think I understand qualitatively why this is the case (It cancels out in the ratio, since both...

Hi everyone! I'm trying to make a list of recommended books (introductory and advanced). So far, what I was able to search are the following: Particle Physics: - Griffiths: Introduction to Elementary Particles - Thomson: Modern Particle Physics - Nachtmann: Elementary Particle Physics -...

The ATLAS experiment has seen a bump that could be a new particle at a mass of 3.0 TeV/c^2 with a local significance of more than three sigma, and a global significance of a bit more than two sigma in Run-2 data looking at decays of qqbb states to a W or Z boson and a Higgs boson. It is...

ever since my first year in undergraduate, I wanted to pursue a degree on theoretical high energy physics. so I took a lot of theoretical classes and started a double major in math (I dropped it after I took some classes I was interested in). however now I have only one year left, I began to...

Hi people, This semester I am going to be a tutor for a master course class on C++ in HEP... I would like to listen from people with more expertise on the field: 1. What do students find (in general) difficult to understand in C++ from your experience with teaching it? In my case I think the...

I've recently finished my Ph.D. in HEP physics but I've not yet applied for any jobs since I don't really know what to do next. So I'm here hoping for some advice/ideas; I'll give fuller details for anyone who can be bothered to read them (sorry about the extreme length). Anyway... I'm almost...

Hi Before closing, I apologize for too long passage calling for the advise. I thought I need to give the potential advisors as precise information as I can. I graduated from a university in South Korea with major in Electrical engineering and minor in physics. I decided to change my major to...

I have a stupid question that has been bugging me for quiet some time and I wouldn't try to post it if I could give myself a reasonable answer, but here it goes: In order to make an analysis in HEP, people rely on codes/tools/frameworks and stuff like this... Here goes my thinking: 1. Suppose an...

I'm in the first year of HEP PhD program and currently learning QFT. The reason why I'm still learning QFT as a grad student even though it has been almost 9 months since I started PhD is because I started physics lately - I changed major when I was junior. I haven't studied SUSY, Supergravity...

Hi there, I'm a junior in undergrad, and so far I've had a summer of research experience at an REU, just started research at my current school in December, and am doing another REU this summer. I'm a transfer student and at my previous school there were literally no research opportunities...

I am looking to apply to some schools in Canada for the M.Sc. program in HEP theory as a safety option. I have already applied to UBC, McGill and Waterloo (none of which I consider safeties, btw). What do you think about Simon Fraser and U of Saskatchewan? Are their departments good in general...

Hey guys, just curious of your opinions on this matter. Which graduate schools are the best to earn a Ph.D. in physics theory from and research in concerning the theoretical sub-fields Quantum Field Theory, General Relativity, and Elementary Particle Physics (maybe String Theory)? Which has...

Hey everyone, I'm clearly new here but currently working on my PhD in High Energy Theory, circa April 2015 (5 years and still going strong). Anyway, I've always hopped on here to browse a few topics and hope I can continue to do so but officially now! Also, I like helping people who are...

Where to go to study experimental high energy physics in the US? What are the best groups working on experiment HEP to join with?

I read some of the articles related to particle physics experiment and don't know the meaning of it. 1. minimum bias event 2. pile up Also, η (pseudo-rapidity) is used instead of θ to describes the angular distribution, but why ? Can someone explains to me ?

Hello! This is my first time starting my own thread and I have spent a lot of time reading other threads and posts about Physics grad admission. My post is not really about "WILL I GET ACCEPTED?" per say, but I just need a place to write about how I feel and for some reason I feel like doing it...

I read recently that all energy is either kinetic or potential. In high energy physics, it is easy to understand the kinetic bit, but potential energy eludes me. What are some examples of potential energy at the high energy physics/elementary particle level? Also, if strings exist, how is...

Hi, I've been trying to find a list somewhere of some of the better HEP graduate programs in the US. I can't find anything specific to HEP though. Does anyone know where I may be able to find this information (online)? I know the some of the more prestigious schools have some of the...

I was wondering if there were any others on the forum who do some form of swing. I personally do list lindy hop, and a little bit of blues and balboa. If not how about other types of dance?

Hey, I was wondering if anyone had any recommendations for something I could research for a paper I have to write about my major (Physics). I could do history of particle physics, but I'd rather not. Any and all suggestions would be great! Thanks for your time, Elwin

Hey, I was wondering if anyone have some suggestions on good summer schools, or where I can find them, for PhD students in High Energy Physics? Europe based would be good but perhaps not necessary. More specifically I am working in QCD Theory/Phenomenology. Cheers!

Im currently in my second year of college, but am a year out from finishing the requirments for a B.S. in physics. If I keep the 18 hours/semester going I could finish a double major for math as well. When applying to a particle/high energy grad program how much weight would a B.S. in math hold...

I am writing a small personal webpage (http://pubpages.unh.edu/~jmm42/JML/levesque.html# ), and am trying to write code so that when the cursor is over my navigation buttons, the buttons highlight to a gray color #404040: and the text color becomes white. I am trying to write this code in...

Hi, Could anyone tell me what type of statistical test is used to estimate the parameters of the standard model? I hear many particle physicists say, eg. "we have a 95% confidence that this quark mass falls between A and B" and what immediately comes to mind are the methods of statistical...

two trains 200 meters and 150 metrers are running on the parallel raila at this rate of 40km/hr and 45 km/hr.in how time will they cross each other if they are running in the same direction?

Hi all, I was wondering what are the prospects of becoming a professor as a particle physicist. Since the LHC experiments have over 5000 scientists and then there's neutrino, heavy ion, dark matter/energy searches, and more, it seems that getting a professorship after ~3 yrs of postdoc work for...

in HEP, what exactly is the definition of soft particle? also, why are branching fractions \Gamma in GeV instead of a unitless ratio?

I was wonder what you felt the important experimental discoveries in high energy physics over the past twenty five years have been? This is a subject I'm not familiar with and would like to do a bit of reading on my own. For instance, I imagine the possible mass of the neutrino would be on...