text: 346,7,756214204122603520,23165990,Seán Bartz 🏁🏎,"It feels hot enough outside to restore chiral symmetry (which my new paper predicts is 151 MeV ~ a trillion degrees) <LINK> When you say ""about a trillion degrees,"" it doesn't matter if you use Fahrenheit or Celsius. Switching to Kelvin is a rounding error. Chirality literally refers to ""handedness"" of particles. Do they seem to be spinning clockwise or counterclockwise as they move toward you? Imagine a football thrown by a right-handed player vs thrown by a lefty. They both move forward, but spin opposite ways. Chirality. A video of a left-handed throw would look the same as video of a right-handed throw that had been reflected in a mirror. Chiral symmetry. Some particles made of quarks look the same as their reflection, and some look reversed. If they were like footballs, this wouldn't matter. But quarks are different. How they look under reflection affects how they interact w/ empty space. Thus, the particles have different masses This is chiral symmetry breaking. A symmetry (mirror reflection) is almost true, but not quite. A mirror universe is different from ours. Chiral symmetry breaking accounts for most of the mass of ordinary matter. Quark mass accounts for about 10%, rest from this interaction This has all been at zero temperature. At high temp and density (like when we collide gold ions together), chiral symmetry is restored. My paper looks at how chiral symmetry is restored as temperature and density increase. Share w/ your friends! <LINK> This paper written in collaboration with a @Macalester undergrad, Theo Jacobson! #heymac <LINK> Also, shout out to @TheOnlyMasSquad whose question inspired the chiral football analogy <LINK>",http://arxiv.org/abs/1607.05751,"We investigate the in-medium behavior of mesons at finite temperature and baryon chemical potential within a soft-wall model of AdS/QCD. We use a quartic scalar potential to obtain the correct form of chiral symmetry breaking. At zero quark mass the chiral phase transition is second-order, becoming a crossover at physical quark mass. At zero baryon chemical potential, we find a chiral transition temperature of 155 MeV in the chiral limit and a pseudo-transition temperature of 151 MeV at physical quark mass, consistent with lattice results. In the low-temperature limit, the second-order transition occurs at a baryon chemical potential of 566 MeV while the rapid crossover occurs at 559 MeV. A new parameterization of the dilaton profile results in improved meson spectra. Meson melting occurs at a lower temperature and chemical potential than the chiral phase transition, so the vector-axial vector mass splitting remains constant until the bound states melt. ",Chiral Phase Transition and Meson Melting from AdS/QCD,13,"['It feels hot enough outside to restore chiral symmetry (which my new paper predicts is 151 MeV ~ a trillion degrees) <LINK>', 'When you say ""about a trillion degrees,"" it doesn\'t matter if you use Fahrenheit or Celsius. Switching to Kelvin is a rounding error.', 'Chirality literally refers to ""handedness"" of particles. Do they seem to be spinning clockwise or counterclockwise as they move toward you?', 'Imagine a football thrown by a right-handed player vs thrown by a lefty. They both move forward, but spin opposite ways. Chirality.', 'A video of a left-handed throw would look the same as video of a right-handed throw that had been reflected in a mirror. Chiral symmetry.', ""Some particles made of quarks look the same as their reflection, and some look reversed. If they were like footballs, this wouldn't matter."", 'But quarks are different. How they look under reflection affects how they interact w/ empty space. Thus, the particles have different masses', 'This is chiral symmetry breaking. A symmetry (mirror reflection) is almost true, but not quite. A mirror universe is different from ours.', 'Chiral symmetry breaking accounts for most of the mass of ordinary matter. Quark mass accounts for about 10%, rest from this interaction', 'This has all been at zero temperature. At high temp and density (like when we collide gold ions together), chiral symmetry is restored.', 'My paper looks at how chiral symmetry is restored as temperature and density increase. Share w/ your friends! https://t.co/M1JkpJ5Rnv', 'This paper written in collaboration with a @Macalester undergrad, Theo Jacobson! #heymac https://t.co/M1JkpJ5Rnv', 'Also, shout out to @TheOnlyMasSquad whose question inspired the chiral football analogy https://t.co/IcRcb8vfSw']",16,07,1667