Nuclear Physics Seminar

semester, 2010


Wednesday, February 3rd 2010
1:25 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Evan Frodermann, University of Minnesota
Subject: There will be no seminar this week.
Soft photons in heavy-ion collisions at forward rapidity.

Wednesday, February 10th 2010
1:25 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: John H .Broadhurst, University of Minnesota
Subject: Use of nuclear processes to enhance radiation treatment of cancer

Wednesday, February 17th 2010
1:25 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Yong-Zhong Qian, University of Minnesota
Subject: What can we learn from supernova neutrinos?

Observational indications for different types of core-collapse supernovae and their characteristic neutrino emission will be reviewed. The various effects associated with neutrino oscillations will be discussed. The neutrino signals expected from different types of supernovae will be examined as probes of supernova physics and neutrino properties.


Wednesday, February 24th 2010
1:25 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Purnendu Chakraborty , University of Minnesota
Subject: Viscosities from Linear Sigma Model

Wednesday, March 3rd 2010
1:25 pm:
Nuclear Physics Seminar in 435 Physics
There will be no seminar this week.

Wednesday, March 10th 2010
1:25 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Jose A. R. Cembranos, University of Minnesota
Subject: Thermodynamics of p-Adic strings

We will discuss the thermodynamics of field theories characterized by nonlocal propagators by focusing on the p-adic models associated with the tachyon phenomenology in string theories. We will compute the partition function and main thermodynamic properties arising from perturbative thermal loops. We will analyze the results from different approaches, as the relation to string theory, presence of ghosts states, generation of vacuum energy, etc.


Wednesday, March 17th 2010
1:25 pm:
Nuclear Physics Seminar in 435 Physics
There will be seminar this week.

Wednesday, March 24th 2010
1:25 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Chen Hou, University of Minnesota
Subject: Gamma Parameter of Dense Plasma in the Crust of Neutron Stars

Wednesday, March 31st 2010
1:25 pm:
Nuclear Physics Seminar in 435 Physics
The seminar has been cancelled. Prof. Kapusta will speak next week.

Wednesday, April 7th 2010
1:25 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Joe Kapusta, University of Minnesota
Subject: Potentials for Soft-Wall AdS/QCD

Soft-wall models in AdS/QCD generally have dilaton and scalar fields that vary with the fifth-dimension coordinate. These fields can be parameterized to yield hadron mass spectra with linear radial trajectories and to incorporate spontaneous breaking of chiral symmetry. We show how to construct scalar potentials which lead to such solutions.


Wednesday, April 14th 2010
1:25 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Abe Reddy (University of Minnesota)
Subject: Applying HBT interferometry to Hawking emission

Wednesday, April 21st 2010
1:25 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Projjwal Banerjee, University of Minnesota
Subject: Can The First Stars be Very Massive?

Wednesday, April 28th 2010
1:25 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Sean Bartz, University of Minnesota
Subject: Radial Excitations of the Pion from a Soft-Wall AdS/QCD Model

After reviewing the previous results from our model, I will present further results from the soft-wall model for the pion sector.


Wednesday, May 5th 2010
1:25 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Laurens Keek, University of Minnesota
Subject: Detailed models of superbursts from accreting neutron stars

Superbursts are the most energetic thermonuclear bursts observed from accreting neutron stars. Deep inside the envelope, close to the crust, a thick carbon-rich layer flashes. Afterwards it takes over a day for the neutron star surface to cool down. Because ignition takes place close to the crust, superbursts are sensitive to crustal heating. The amount of crustal heating depends on the nuclear physics in the crust and core, and is not well understood. Superbursts provide an observational measure to probe this. We present the first multi-zone models of series of recurring superbursts created with a hydrodynamic stellar evolution code that includes a large network of nuclear reactions. We obtain constraints for crustal heating by comparing our models to the scarce observational data. Furthermore, we discuss how our model reproduces characteristics of the observed light curve, such as details of the precursor burst that is seen just prior to the superburst.


Wednesday, May 12th 2010
1:25 pm:
Nuclear Physics Seminar in 435 Physics
There will be no seminar this week.

Wednesday, September 8th 2010
1:30 pm:
Nuclear Physics Seminar in 435 Physics
There will be an organizational meeting this week

Wednesday, September 15th 2010
1:30 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Laurens Keek, University of Minnesota
Subject: Thermonuclear carbon flashes from accreting neutron stars

Wednesday, September 22nd 2010
1:30 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Chen Hou, University of Minnesota
Subject: Snow storm in the neutron star crust

Wednesday, September 29th 2010
1:30 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Sean Bartz, University of Minnesota
Subject: Pion Mass Spectrum from AdS/QCD

The Anti-de Sitter Space/Conformal Field Theory correspondence offers insights into the non-perturbative regime of strongly coupled gauge theories such as Quantum Chromodynamics. I present the results of a soft-wall AdS/QCD model applied to the radial excitations of the pion. In this model, we show the equivalence of two common representations of the pseudoscalar field. We calculate the mass eigenvalues of these representations, finding good agreement with experiment. The Gell-Mann-Oakes-Renner relation is also naturally obtained.


Wednesday, October 6th 2010
1:30 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Alexander Heger, University of Minnesota
Subject: Multi-Zone Models for Type I X-Ray Bursts - Movies and live show

Wednesday, October 13th 2010
1:30 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Michael Albright and Joe Kapusta, University of Minnesota
Subject: Quasi-Particle Theory of Transport in Hot Dense Matter

A theoretical framework for the calculation of transport coefficients of
hadronic matter at finite temperature is presented. The framework is
based on the quasi-particle picture. It allows for an arbitrary number of hadron species with point-like interactions, and allows for both elastic and inelastic collisions. Detailed balance is ensured. The particles have temperature dependent masses arising from mean field or potential effects, which maintains self-consistency between the equation of state and the transport coefficients. An application to the linear sigma model is given.


Wednesday, October 20th 2010
1:30 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Yong-Zhong Qian, University of Minnesota
Subject: Recent progress and future outlook of r-process studies

Wednesday, October 27th 2010
1:30 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Chris West, University of Minnesota
Subject: To be announced.

Wednesday, November 3rd 2010
1:30 pm:
Nuclear Physics Seminar in 435 Physics
There will be no seminar this week.

Wednesday, November 10th 2010
1:30 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Projjwal Banerjee, University of Minnesota
Subject: Neutrino induced nucleosynthesis

Wednesday, November 17th 2010
1:30 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Thomas Kelley, University of Minnesota
Subject: The Thermodynamics of a 5D Gravity-Dilaton-Tachyon Solution

The LHC has started heavy-ion collisions. Such collisions
create the so-called quark-gluon plasma (QGP). I discuss a
finite-temperature holographic model with a soft-wall geometry that may be able to analytically describe QGP. The 5D model is a black-hole dynamical solution of Einstein's equations that is used to calculate the thermal properties of the corresponding 4D gauge theory.


Wednesday, November 24th 2010
1:30 pm:
Nuclear Physics Seminar in 435 Physics
There will be no seminar this week.

Wednesday, December 1st 2010
1:30 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Ke-Jung Chen (University of Minnesota)
Subject: The Biggest Explosions of the Universe: Simulations of Thermonuclear Supernovae of Very Massive Stars

Current models of the formation of the first stars in the universe suggest that these stars were very massive, having a typical mass scale of hundreds of solar masses. Such stars would explode as pair instability supernovae (PSNe). We present the results from multidimensional numerical studies of PSNe with a new radiation-hydrodynamics code, CASTRO. We simulate the fluid instabilities that occur in multiple spatial dimensions and discuss how the resulting mixing affects the explosion and nucleosynthesis of these supernovae.


Wednesday, December 8th 2010
1:30 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Meng-Ru Wu, University of Minnesota
Subject: Spectra dependence of collective neutrino oscillations in supernovae

Wednesday, December 15th 2010
1:30 pm:
Nuclear Physics Seminar in 435 Physics
There will be no seminar this week.

Wednesday, December 22nd 2010
1:30 pm:
Nuclear Physics Seminar in 435 Physics
No seminar. Finals week.

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