Recent content by daschaich

By coincidence, I saw today a recent PhD thesis on computational calculations of causal dynamical triangulation, completed at Jagiellonian University in Kraków. If this sounds like something that may interest you, then you could check out the authors cited in the bibliography to find other...

To reiterate one of bromden's points, to a first approximation pretty much any research university in the US (or other countries) has some physicists working in part or entirely on computational projects. However, different places will have different specialties, such as particle physics (with...

No. While muons and tau leptons are essentially "electrons, only heavier", the proton is a completely different beastie. Among other things, the proton is a composite object formed of quarks and gluons, whereas all the leptons are elementary point particles to the limit of our current...

This 45MB pdf is the most recent information I was able to find about HyperK, from the 2010 International Workshop on Next generation Nucleon Decay and Neutrino Detectors (NNN10) last December, which estimates construction from 2014 until 2019. There may be updates at NNN11 coming up this...

Not very fast, at least not without new apparatus. Check out slide 32 in http://www-conf.slac.stanford.edu/icfa2008/kearns081028.pdf The plot there shows the SuperK proton lifetime sensitivity hitting 10^34 years around 2007, and 2x10^34 around 2017. The 2009 press release you mention on...

Neutrino mixing is precisely this "something similar". Recall that for quark mixing, we have the choice of mixing either the up-type quarks or the down-type quarks (or both with some redundancy). On the leptonic side, we have the choice of mixing either the neutrinos or the charged leptons (or...

Excellent explanation element4. I believe the question is just how physicists label the number of fermions transforming under the gauge group. We call each different type of fermion a "flavor", and use N_f to refer to the number of flavors. A slight complication is that we tend to assume...

Thanks for that explanation, fzero. I'm also working on a project involving the electroweak chiral lagrangian, so I appreciate this information. CoolPhysics5, Appelquist and Wu write down Feynman rules for triple gauge vertices from the EWchiL. It might be an instructive exercise to...

Heh. Then there are various hadrons, particularly the bottom hadrons explored at the B factories. Deep inelastic scattering experiments provided a lot of information about parton distribution functions and other hadronic structure functions and form factors. Jet physics dates back to the...

You might be interested by this brief summary that Matt Strassler wrote about "How We Learn What Happened in a Proton-Proton Collision". In particular, we track the particles produced in collisions through their interactions with the surrounding environment (the detector). Since we don't...

Dickfore, that's all correct except for: The photon is massless because it is a gauge boson; the three Nambu--Goldstone bosons resulting from the SU(2) \times U(1) \to U(1) symmetry breaking are "eaten" by the W and Z becoming massive. The electric charge (i.e., electromagnetic coupling) e...

Nope, standard model Higgs cross sections are much smaller.

Here it is: http://www-d0.fnal.gov/Run2Physics/WWW/results/final/HIGGS/H11B/ They say: "We find no evidence for anomalous resonant dijet production".

CDF has posted many updated plots and comments here: http://www-cdf.fnal.gov/physics/ewk/2011/wjj/7_3.html They claim 4.1sigma significance considering both statistical and systematic uncertainties (the 4.8sigma only considers statistical uncertainties). There are rumors of a DZero release on...

Fair enough, that's not my field of expertise (though I vaguely recall some debate regarding whether or not such a decomposition is really well-defined, i.e., unique and gauge-invariant). Quick Google searches give me plenty of lattice results on the spin structures of hadrons. For instance...