University of Rochester

High Energy and Nuclear Physics Seminars 2011-2012
Arie Bodek, Regnina Demina
Last Updated   March 28, 2012
Bodek at pas.rochester.edu, regina at pas.rochester.edu

  Seminars are Tuesdays, 3:30-4:30 pm, room BL372 - See details (Title and Abstract)  for each seminar after the list below.

High Energy and Nuclear Physics Seminars Fall 2011 - Spring 2012

Sept. 13, 2011  Tuesday   Regina Demina, UR 
Title:  t-tbar charge production asymmetry in p-pbar collisions.

Sept. 20, 2011  Tuesday   Melanie Day, UR    T2K Seminar
     Title: Indications of Electron Neutrino Appearance at T2K

Abstract: Starting in 1998 experiments began to show that neutrinos oscillate from one flavor to another over time, a phenomena that is explained by the existence of neutrino mass. Oscillation from muon and electron neutrino into tau neutrino has been measured to great precision in many experiments. T2K is a long baseline experiment from Tokai to Kamioka in Japan that was designed to measure the more difficult oscillation from muon neutrino into electron neutrino. A description of the T2K experiment and the recent result showing an indication of electron neutrino appearance at the far detector with a significance of 2.5σ will be discussed.

Sept. 27, 2011  Tuesday    No seminar Kevin and Steve out of town.

Oct. 4, 2011  Tuesday Arie Bodek, 
Title:  Neutrino Quasielastic Scattering from Nuclear Targets

Abstract. We present a parametrization of the observed enhancement in the transverse electron quasielas-tic (QE) response function for nucleons bound in carbon as a function of the square of the four momentum transfer (Q2) in terms of a correction to the magnetic form factors of bound nucleons.. The Q2 dependence of the transverse enhancement is observed to resolve much of the long standing discrepancy in the QE total cross sections and differential distributions between low energy and high energy neutrino experiments on nuclear targets (sometimes referred to as the axial mass anomaly).  

Oct. 6, 2011   Thursday, 3:30 pm BL372  Special Seminar -   Luca Grandi (Princeton)  Dark Matter

Oct. 11, 2011  Tuesday Jesse Woden, Stanford - Neutrinoless Double Beta Decay (Fall Break)

Oct. 18, 2011 Tuesday  - No seminar
Oct. 25, 2011 Tuesday  - No seminar, Quantum Optics Seminar instead

Nov. 1, 2011 Tuesday   - No seminar - election day
Nov. 8, 2011 Tuesday  -   Thomas McElmurry,  University of Rochester 
 Title: Top Pair Forward-Backward Asymmetry from Loops of New Strongly Coupled  Quarks

Abstract:  We examine loop-mediated effects of new heavy quarks Q=(t',b') on ttbar production at hadron colliders, using a phenomenological model  with flavor off-diagonal couplings of charged and neutral scalars  phi=(phi^+-,phi^0) to Q. We show that an invariant-mass-dependent asymmetry, in the t tbar center of mass, consistent with those recently reported by the CDF collaboration can be obtained for quark masses around 350-500 GeV, scalar masses of order 100-200 GeV, and modest to strong Yukawa couplings. Wefurther show that this invariant-mass dependence can be used to probe the parameters of the underlying model. The requisite strong interactions suggest a non-perturbative electroweak symmetry breaking mechanism and composite states at the weak scale. A typical prediction of this framework is  that the new heavy quarks decay dominantly into t phi final states.

Nov. 15, 2011 Tuesday   -  no seminar

Nov. 22, 2011 Tuesday - no seminar

Nov. 29, 2011 Tuesday  Robert Shrock of Stony BrooK Title:
"Some Recent Results on Technicolor and Extended Technicolor Models"

Dec . 6, 2011 Tuesday   John Arrington - Argonne National Lab.
  Title:  High Momentum Components and Short Range Correlations in Nuclei

Dec . 13, 2011 Tuesday  - no seminar

Jan . 24, 2012 Tuesday  -  no seminar
Jan . 31, 2012 Tuesday  -  no seminar

Feb . 7, 2012 Tuesday  - no seminar
Feb . 14, 2012 Tuesday -  no seminar
Feb . 21, 2012 Tuesday  -  no seminar
Feb . 28, 2012 Tuesday  - no seminar
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Mar . 6, 2012   Tuesday, March 6, 2012 - 3:30pm
Dr. Segev Y. BenZvi University of Wisconsin-Madison: Mapping the TeV Sky with cosmic rays and gamma rays

The high-energy charged particles known as cosmic rays were first discovered 100 years ago, but we have yet to confirm where and how they are created.  It is believed that most of the cosmic rays at TeV energies are accelerated by supernova remnants in our galaxy, but because the cosmic rays are deflected by galactic magnetic fields, we cannot trace their paths back to their sources.
   Magnetic "scrambling" of the cosmic rays is expected to make their arrival direction distribution at Earth almost completely isotropic. However, during the past several years multiple experiments have reported a significant anisotropy in the TeV cosmic rays observed in the northern hemisphere.  These surprising results are not currently well-understood.
   The IceCube Neutrino Observatory, which is deployed at the South Pole and was completed in 2010, is sensitive to TeV cosmic rays arriving from the southern sky.  The IceCube data show that the anisotropy observed in the northern hemisphere is also present in the south on both large and small angular scales.  The anisotropy also appears to have a strong energy dependence.  We will describe the IceCube results and discuss the possible origins of the anisotropy.  We will also discuss future measurements of TeV cosmic rays and gamma rays at the HAWC Gamma Ray Observatory, currently under construction in Mexico.

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Mar . 20, 2012 Tuesday, March 20, 2012 - 3:30pm
Dr. Jeter Hall Fermilab  :  Searching for low mass dark matter

There is overwhelming evidence that a majority of the matter in the Universe is non-baryonic, cold, dark matter. Weakly Interacting Massive Particles (WIMPs) are a compelling class of candidates for dark matter and a number of experimental programs are rapidly increasing sensitivity for WIMPs. Recently there has been theoretical and experimental interest in WIMPs with a mass of 1-10 GeV. I will describe some of the challenges in searching for particles that are light compared to the nuclei of most modern dark matter detectors. I will present the latest results from the Cryogenic Dark Matter Search and prospects for further exploring the low mass WIMPs hypothesis.
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Mar .  27, 2012 Tuesday -  no seminar

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April . 3, 2012 Tuesday -  two seminars one at 2 pm and one at 3:30 pm
 -------
Tuesday, April 3
Event Location: Bausch & Lomb 372 at 2 pm  (followed by tea at 3 pm)
Speaker: Dr. Luciano Calabretta, Laboratori Nazionali del Sud
Talk Title: High power cyclotrons for accelerator driven subcritical nuclear reactor systems
Abstract:
An accelerator module based on a injector cyclotron and a Superconducting Ring Cyclotron (SRC) able to accelerate  H2+ molecules is presented.  H2+ molecules are stripped by a foil and create a proton beam with maximum energy of 800 MeV and a maximum power of 8 MW. Extensive beam dynamics studies have begun carried out in the last two years and prove the feasibility of such a machine for the DAEdALUS (Decay At rest Experiment for d_cp At Laboratory for Underground Science) experiment, proposed by groups of MIT and Columbia University.

The use of H2+ molecules beam has three main advantages: 1) it reduces the space charge effects, 2) because of stripping extraction, it simplifies the extraction process w.r.t. single turn extraction and 3) we can extract more than one beam out of one SRC.

*It is straightforward to propose this solution, suitable upgraded to deliver up to 10 MW, to drive an ADS. In particular a system based on three accelerator modules to drive two sub critical reactors will be described. Each SRC will be equipped with two extraction systems, delivering in total six beams to drive the two reactors. This solution allows us to minimize the construction and operational cost of the accelerator chain and benefiting directly from the build in redundancy i.e. two reactors can still be feed when one accelerator module is off*.

The description of the superconducting magnetic sector simulated by the code TOSCA and the simulation of the beam dynamic along the SRC will be presented. Feasibility aspects of the ring cyclotron, the advantages and problems relates with acceleration of the H2+ molecules, and main features of the cyclotron injector will be discussed.
 

Tuesday, April 3, 2012
Event Location: Bausch & Lomb 372 at 3:30 pm (tea at 3 pm in B&L 271)
Speaker: Dr. Constantine Papageorgakis, Rutgers University
Talk Title: Recent developments in String Theory
Abstract:
M-theory is the over-arching 11-dimensional theory which includes all 10-dimensional string theories in its moduli space. Its fundamental degrees of freedom are believed to involve not strings but membranes (or M2-branes) and so-called M5-branes. Due to the inherently non-perturbative nature of M-theory our grasp over both of these has been remarkably limited until recently. In this talk I will introduce all of the above objects, concepts and theories and will review advances over the last few years which have significantly improved our understanding.

April . 10, 2012 Tuesday - OPEN
April . 17, 2012 Tuesday - OPEN
April . 24, 2012 Tuesday - OPEN

May . 1, 2012 Tuesday - OPEN

--------------------------------

----Historical Records

Spring 2011

Jan 18, 2011 no seminar faculty senate --> January 17, 2011  Liang Yang   http://www.pas.rochester.edu/urpas/particle_physics_seminar_13
Jan 25, 2011  no seminar
Feb. 1, 2011   Lauren Hsu    http://www.pas.rochester.edu/urpas/calendar/2011/02/1
Feb.. 8, 2011   Juan Estrada   http://www.pas.rochester.edu/urpas/calendar/2011/02/8
Feb. 15, 2011 - (faculty senate)    David Goldstein  http://www.pas.rochester.edu/urpas/calendar/2011/02/15
Feb. 16, 2011 (Wed)  Alex Shushkov  http://www.pas.rochester.edu/urpas/calendar/2011/02/16
Feb. 22, 2011   Jesse Wodin  http://www.pas.rochester.edu/urpas/calendar/2011/02/22
 March 2, 2011  (Colloq)  Doreen Wackeroth http://www.pas.rochester.edu/urpas/physics_astronomy_colloquium_31
March 1, 2011 Open
March 8, 2011 Spring Break,  no seminar
March 15, 2011  no seminar faculty senate
March 22, 2011 - Henning Fleatcher, University of Rochester   SUSY searches at LHC
March 29, 2011  - Open
April 5, 2011 - Luca Grandi,  Princeton - Dark Matter
April 12, 2011 - Philip Rodrigues - New Results for T2K
April 19, 2011  no seminar faculty senate
April 26, 2010  Open  - Last seminarTBA
requests
From Ferbel;  contact  Hassan Jawahery, U of Maryland.
From Orr;  invite Dave Gerdes at Michigan (gerdes@umich.edu) to  talk about the Dark Energy Survey
Veronica Sanz   vsanz@yorku.ca,veronica.hirn@gmail. moved to Spring.

 Henning Fleatcher

Sept 14 , 2010             no seminar.    Kevin out of Town
Sept 21, , 2010            no seminar
Sept 28,  2010             not seminar, Kevin out of Town
 Oct   5, 2010              Ian Taylor (SUNY SB) : The first T2K physics run
Abstract:
T2K is a long-baseline neutrino oscillation experiment in Japan, which started data taking in January 2010.  The talk will cover the design philosophy of the experiment, the status and performance of the beam and detectors during the first run, the progress towards a first analysis and plans for the future.

Oct 12, 2010     Frozen in Time: Neutrino Physics with Liquid Argon Detectors
Mitch Soderberg  ; Syracuse University / Fermilab
Abstract
The discovery just over a decade ago that neutrinos can change identities by oscillating between flavors was a remarkable revision to the Standard Model description of these particles. This discovery implies that neutrinos are not massless as had previously been thought, and opens the possibility that they might play a crucial role in answering
fundamental questions such as whether the observed matterantimatter asymmetry in the universe can be attributed to CP violating
neutrino interactions. Liquid Argon Time Projection Chambers (LAr TPCs) are ideally suited for the study of neutrino interactions thanks to precision detection capabilities that make them the modern day equivalent of bubble chambers. In this talk I will introduce the LAr TPC concept, highlighting recent work in the development of this technology for use in studying neutrinos with increasingly larger detectors. After presenting the details of current work in this area at Fermilab, I will conclude by discussing preliminary ideas for the next generation of neutrino oscillation experiments that could feature
 20 kiloton LAr TPC far detector at the Deep Underground Science and Engineering Laboratory (DUSEL) in South Dakota.

Oct. 26, 2010    no seminar, levin out of town.
Nov. 2, 2010   no seminar, faculty sentate
Nov. 9, 2010   no seminar Kevin out of town
Nov, 16, 2010  Andrew Blechman   blechman@wayne.edu
Nov. 23, 2010  Open  
Nov. 30, 2010  Open  
Dec. 7, 2010  no seminar Kevin out of Town

requests: 

High Energy and Nuclear Physics Seminars Spring 2010

Jan 19, 2010             no seminar.   Faculty senate
Jan 26, 2010            no seminar, Kevin out of town (Jan 25-30)

Feb 2, 2010            Alexander Mitov, Stony Brook     alexander.mitov@stonybrook.edu
Title: "How well do we know the top-pair cross-section at the Tevatron and LHC?"
Abstract: I will present the many theoretical advances made in the last couple of years that are needed for precision studies of heavy flavor production at hadron colliders (fixed order calculations, massive gauge theory amplitudes, all order resummations). I will then focus on LHC and Tevatron phenomenology addressing the question: how well do we know the top-pair cross-section at the Tevatron and LHC?

Feb. 9, 2010             no seminar,     Kevin out of town (Feb.  8-12)

Feb. 16, 2010             Un Ki Yang,  Manchester
Title:  Searches for new physics in top quark and neutrino sectors at hadron colliders
Abstact:  I will present the recent CDF results on the searches for new physics in top quark sector, mainly charged Higgs, and will also discuss the prospects for few interesting new physics searches in the top quark and neutrino sectors using early ATLAS data at the LHC.

Feb. 23, 2010          no seminar           Kevin out of town (Feb. 22-26)

March 2, 2010      open
Title:
Abstact:

March 9, 2010         No seminar - Spring break.

Monday March 15, 2020,   Particle/Nuclear  Seminar

 Prof. Osamu Hashimoto : Department of physics, Tohoku University,  Sendai, JAPAN

Title:          Test of charge symmetry breaking in A=7 hypernuclei

Abstract :  Hypernuclear spectroscopy made progress in the past years  both by hadronic beams and electron beams.  I will give introductory description of Lambda hypernuclear spectroscopy, emphasizing  our programs at KEK and Jefferson Lab Hall C. As an example of recent results at JLab, test of charge symmetry breaking in A=7 T=1 iso-triplet hypernuclei will be presented based on our binding energy determination of $^{7}_{\Lambda}$He. Research activity of strangeness nuclear physics group at Tohoku University, and future prospect of the study of strangeness degree of freedom in hadronic many-body sistem will be also briefly described.  

,March 16, 2010     No seminar,  Aran out of town,  Faculty senate    

March 23, 2010       no seminar,    Kevin out of town   
         Brock Tweedie <brock@pha.jhu.edu>  asked him to move from March 23 to March 30,10

March 30, 2010   Brock Tweedie  John Hopkina  <brock@pha.jhu.edu> 
Title:
Abstact:

Wed. March 31, 2010 Colloq.  3:30 pm Tea,  Talk  3:45 pm

Speaker:  "Bill McDonough" <mcdonoug@geol.umd.edu>
Talk title_: Geoneutrino/Antineutrino detection: an interdisciplinary experiment at the boundaries of physics, astrophysics, geology and
national security
Short Abstract_:  The KamLAND experiment in Japan successfully measured the antineutrino flux from an encircling array of nuclear power plants,
as well as detecting the geoneutrino flux from the earth.  This and the Borexino experiments are now placing limits on the distribution of heat
producing elements in the Earth [the nuclear power that drives convection in the earth and plate tectonics], the potential existence of
a natural georeactor (nuclear) deep inside the earth, as well as providing insights into the solar burning model of the sun.  I will
present proposals for large (10-50 kT) liquid scintillation experiments, which include a mobile device that is deployable in ocean, with specific
applications in physics, astrophysics, geology and national security.  I will also show how the results from the KamLAND geoneutrino experiment
challenges geophysical models for the thermal evolution of the earth and alternatively support a significant contribution from secular cooling of
the earth's mantle.

April 6, 2010              no  seminar (Faculty senate)
 

April 13, 2010      Florencia Canelli ,  University of Chicago
Title: New Electroweak and Top Physics Results from the Tevatron

Abstract: In this seminar I will show the latest and most precise electroweak and top quark physics results from the CDF and D0
experiments. I will include newly observed diboson processes, the Tevatron combined W boson mass, the new CDF top quark mass, and the latest results regarding top quark properties. I will conclude by explaining how these measurements help us get closer to finding the elusive Higgs boson.

April 20, 2010               no seminar,  Kevin out of town

April 27, 2010      Veronica Sanz-Gonzalez,  York University  ( vsanz@yorku.ca)
Title"Dark Matter Leaves a Trace",
Abstract

Pseudo-Dirac Dark Matter is a type of dark matter which behaves Dirac-like for relic abundance and Majorana-like in direct detection experiments. Dirac dark matter has unsuppressed s-wave interactions, avoiding overabundance issues. Majorana dark matter lacks potentially dangerous vector interactions with nuclei. Satisfying both constraints, relic abundance and direct detection bounds, sets the splitting between two nearly-degenerate states composing a pseudo-Dirac fermion. This physical scale is such that missing energy is produced in association with visible displaced vertices of two leptons or jets at colliders. Because of the additional information from relic abundance, all parameters can be extracted  from the decay length and the invariant mass of the products, even though the measurement involves missing energy.------

emails sent to : tye (sht5@cornell.edu), asner (asner@physics.carleton.ca)
 

Archive of High Energy and Nuclear Physics Seminars 2008-2009
 
Fall 08  (For titles and Abstract, see bottom of this page)
 
9/9/08  -  Andrew Blechman, University of  Toronto   (hosted by Arie Bodek)
 9/16/08  -  no seminar
 9/23/08  -  Ashok Das, University of Rocheseter (hosted by Arie Bodek)
9/30/08  -  No seminar - Rosh Hashana
10/7/08 -  Haryo Sumowidagdo ,  Florida State University (hosted by Aran Garcia-Bellido)
10/14/08   Sarada Rajeev,  University of Rochesrer  (hosted by Arie Bodek)
 10/21/08  Mark Trodden, Syracuse University -(hosted by Arie Bodek)
10/28/08   Sourabh Dube, Rutgers  (hosted by Aran Garcia-Bellido)
11/4/08     Carsten Rott,  Ohio State  (hosted by Aran Garcia-Bellido)
11/11/08  - Pablo D. Goldenzweig, U. Cincinnati  (hosted by Aran Garcia-Bellido)
11/18/08  - Ron Poling ,  U Minnesota  (hosted by Arie Bodek)
11/25/08  - Jiyeon Han, University of Rochester (hosted by Arie Bodek)
12/2  -        no seminar
12/9/08    - Lynne Orr, University of Rochester  (hosted by Arie Bodek)

Spring 09  (For titles and Abstract, see bottom of this page)

1/20/90  Urlich Baur,  University of  Buffalo  (hosted by Arie Bodek)
1/27/09 - Cristiano Galbiati, Princeton  (Hosted by Kevin McFarland)
2/3/09 -  Open   - hosted by
2/10/09- Jodi Cooley, Stanford University
  http://med.stanford.edu/profiles/frdActionServlet?choiceId=printerprofile&fid=8820
http://med.stanford.edu/profiles/Jodi_Cooley-Sekula/
2/17/09 - Open  - hosted by
2/24/09 - Amanda Weinstein, UCLA
       http://www.astro.ucla.edu/~veritas/team.htm
3/3/09 -     Jonghee Yoo, Fermilab
Tuesday 3/10/09   - No seminar -  Spring Break (Aran out of town)
Tuesday 3/17/09   -  No seminar - APS meeting (Aran out of town)
3/24/09 - no seminar
3/31/09 - Cynthia Keppel, Hampton University and Jefferson Lab  (hosted by Arie Bodek)
4/2/ 2009   Special HEP Seminar  Dave Toback (Texas A&M) - THIS IS A THURSDAY - (hosted by Aran Garcia-Bellido)
4/7/09    Steve Ritz, NASA    (hosted by  Arie Bodek) - Aran out of town
4/14/09 -Toichiro Kinoshita, Cornell  (hosted by Arie Bodek)
4/21/09 - William Wester, FNAL  (hosted by Aran Garcia-Bellido)
Wed 4/22/09  Geumbong Yu,   Department of Physics and Astronomy, University of Rochester 

TITLES AND ABSTRACTS
Fall  2008 -