| Friday, March 22, 2024 |
| Popov | |
| Event Type: Hep Th Discussion Group | |
| Time: 12:00 PM - 1:30 PM | |
| Location: 726 Broadway, 902, Lg Conf | |
| String Derived Z′ Model at an Upgraded Superconducting Super Collider | |
| Alon Farragi, Liverpool University | |
| Event Type: Informal HEP Talk | |
| Time: 12:30 PM - 1:45 PM | |
| Location: 726 Broadway, 940, CCPP Seminar | |
| Abstract: The future of collider physics is under investigation. With the High Luminosity LHC program lasting until the late 2030s, the next machine in the energy frontier is envisioned to appear in 30--40 years, which may be too far into the future to sustain the field. In this paper we explore the physics potential of an Upgraded Superconducting Super Collider (USSC). The Original Superconducting Super Collider (OSSC) was planned to operate at 20TeV beam energy, and with improved magnet technology and/or longer tunnel, one may envision that it can be extended to 25--30TeV beam energy. Given that the decision on the OSSC construction took place in Autumn 1988 and it was planned to start operation in the 1996-1999 period, an USSC can be constructed 10--15 years from decision and fill the gap between the end of HL--LHC and the future envisioned machines. While the main mission of the USSC will be to test the Standard Model and its electroweak and strongly interacting sectors, as a specific example we illustrate the invariant mass distribution at NNLO in QCD for a 5 TeV Z′ in the string derived Z′ model. | |
| The action for self-dual p-form gauge fields and the geometry of gravitons | |
| Chris Hull, Imperial College, London | |
| Event Type: Informal HEP Talk | |
| Time: 2:00 PM - 3:15 PM | |
| Location: 726 Broadway, 940, CCPP Seminar | |
| Abstract: Sen's action for a p-form gauge field with self-dual field strength coupled to a spacetime metric involves an explicit Minkowski metric in addition to the spacetime metric and the presence of this raises questions as to whether the action is coordinate independent and whether it can be used on a general spacetime manifold. A natural generalisation of Sen's action is presented in which the Minkowski metric is replaced by a second metric on spacetime. The resulting theory is covariant and can be formulated on any spacetime. It describes a physical sector, consisting of the chiral p-form gauge field coupled to the dynamical metric g, plus a shadow sector consisting of a second chiral p-form and the second metric. A spacetime with two metrics has some interesting geometry and some of this is explored here and used in the construction of the interactions. The action has two diffeomorphism-like symmetries, one acting only on the physical sector and one acting only on the shadow sector, with the spacetime diffeomorphism symmetry arising as the diagonal subgroup. | |