I am traveling today and received the following note from Maya.

Papa,

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Today, I will be adding more commands to my code so that 1) it will have title text 2) the like sign data (blue) will be fit with a 3rd order polynomial function and 3) the unlike sign data (red) will be fit with a gaussian function, hopefully. The last one will probably be the hardest, because I only just learned about Gaussian fits yesterday. Also, side note, the x axis of the graph is being measured in volts, not grams. Giga-electron Volts actually, GeV.
I’d say I understand about 70% of the project I am working on. Yesterday I spent a lot of time reading about the Muon Telescope Detector, which is the detector that collected this upsilon data. I’ll include pictures of its general construction. I’ve also been reading and asking about upsilon. Upsilon is a meson that is made up of a bottom quark and its antiparticle. Because the bottom quark and the bottom anti-quark have color charges that are compliments, they cancel each other out. This means that upsilon is “flavorless” or in a quarkonium state. I have yet to figure out what is significant about this state or why we are so interested in it, but I’m not done reading yet and I can ask more in tomorrow’s meeting.
Eric, the other intern in my lab, has also been looking at a flavorless meson emitted in the central collisions. It’s called J/psi (pronounced jape-sigh). It’s really similar to upsilon in that it is comprised of a quark and its antiparticle (compliment color charges that cancel each other out). I only mention this because Papa you will be psyched. Charm + anti-charm = J/psi meson. According to wikipedia “Mesons formed by a bound state of a charm quark and a charm anti-quark are generally known as ‘charmonium’”. I feel like charmonium is a Carl word.
So, long story short. The histogram I just made is comparing the number of like sign and unlike sign upsilon mesons that were emitted over the course of many RHIC collisions from their last batch. The unlike signs are slightly more common which is very important!! I don’t know why, but Rongrong says it is! Anyways, blog message received, you may post any or all of these pictures.