PHY106Quarks-2

PHY106Quarks-2 - Announcements Based on a students input, I...

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Unformatted text preview: Announcements Based on a students input, I have now made the solutions to the HW available in the Physics Library. (Rm 208 Physics Building). They are on restricted reserve, which means you can check them out, but they must stay in the library. Solutions will be posted on the Monday after they are due. If you do not hand in the assignment by then, it cannot be counted The first set of exercises from Lab1, and HWs 1 & 2 are now available for you.. Based on a students input, I have now made the solutions to the HW available in the Physics Library. (Rm 208 Physics Building). They are on restricted reserve, which means you can check them out, but they must stay in the library. Solutions will be posted on the Monday after they are due. If you do not hand in the assignment by then, it cannot be counted The first set of exercises from Lab1, and HWs 1 & 2 are now available for you.. Review from last time A bit more on quarks 6 different kinds of quarks. Matter is composed mainly of up quarks and down quarks bound in the nuclei of atoms . The masses vary dramatically (from ~0.005 to 175 [GeV/c 2 ]) Why is matter made only of up & down quarks ? This will be answered later! Mass [GeV/c 2 ] Gold atom Silver atom Proton Anti-particles too ! We also know that every particle has a corresponding antiparticle ! That is, there are also 6 anti-quarks, they have opposite charge to the quarks. So, the full slate of quarks are: , , , , u c t d s b Q= +2/3 Q= -1/3 Quarks Particle , , , , u c t d s b Q= -2/3 Q= +1/3 Anti- Particle Quark Confinement Quarks are confined inside hadrons (baryons or mesons). We do not see them as free particles (like electrons, for example). This is a result of the strong force which we will discuss later Quarks are confined inside hadrons (baryons or mesons). We do not see them as free particles (like electrons, for example). This is a result of the strong force which we will discuss later q Hadron Jail Protons & Neutrons To make a proton: We bind 2 up quarks of Q = +2/3 and 1 down quark of Q = -1/3 ....
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PHY106Quarks-2 - Announcements Based on a students input, I...

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