University of Rochester
High Energy and
Nuclear Physics Seminars 2009-2010
Arie Bodek and Aran
Garcia-Bellido
Last Updated Sept 16, 2009
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 2009-2010
September 22, 2009
Speaker: Adrian Melissinos, Rochester.
Title: "The effect of the tides on the LIGO interferometers"
Abstract: Long arm interferometers are subject to the tidal
deformations of the Earth, which must be compensated to keep the
instrument on a dark fringe. In addition tidal forces produce a
time-dependent, f ~ 10^{-5} Hz, gravity gradient along the arms which
affects the signal at the free spectral range frequency. Data obtained
by the LIGO Scientific Collaboration show that the observed tidal lines
agree with the known values to within the measurement resolution of
6x10^{-9} Hz.
September 29, 2009 http://www.pas.rochester.edu/urpas/calendar/2009/09/29
https://www.pas.rochester.edu/urpas/particle_physics_seminar_5
Speaker: Craig Hogan, Fermilab
Title: "Holographic Noise in
Michelson Interferometers: a Direct Experimental Probe of
Unification at the Planck Scale"
Abstract: Classical spacetime and quantum mass-energy form the basis of
all of physics. They become inconsistent with each other at the
Planck scale,
5.4 times 10^{-44} seconds, which may signify a need for
reconciliation in a unified theory. Although proposals for
unified theories exist, a direct experimental probe of this
scale, 16 orders of magnitude above Tevatron energy, has seemed
hopelessly out of reach. However in a particular interpretation
of holographic unified theories, derived from black hole
evaporation physics, a world assembled out of
Planck-scale waves displays effects of unification
with a new kind of uncertainty in position at the Planck
diffraction scale, the geometric mean of the Planck length and
the apparatus size. In this case a new phenomenon may measurable,
an indeterminacy of spacetime position that appears as noise in
interferometers. The colloquium will discuss the theory of the
effect, and our plans to build a holographic interferometer at
Fermilab to measure it.
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 Blackman,
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 -
9/9
- Andrew Blackman,
University of Toronto
The
R-Symmetric supersymmetric standard model
https://www.pas.rochester.edu/urpas/particle_physics_seminar
The
R-Symmetric supersymmetric standard model
9/16 - no
seminar
9
/23 - Ashok Das,
University of Rochester
Superstring
theory and PT
symmetric quantum mechanics
https://www.pas.rochester.edu/urpas/high_energy_physics_seminar_10
Superstring
theory and PT
symmetric quantum mechanics
9/30 - No seminar
- Rosh Hashana
Tuesday 10/7/08
- Suharyo
Sumowidagdo, Florida State University
Title: Top Quark Pair
Production in Tau+Lepton Channel: Probing interactions between members
of the third generation.
Abstract
We present the measurement of
top quark-antiquark pair production in lepton+hadronic tau channel
using approximately 1 inverse femtobarn of DO data. We select
events with one isolated, energetic electron or muon, one isolated
hadronic tau, high missing transverse energy, and two or more energetic jets. One or
more of the jets are required to have originated from a b-quark by
applying neural network tagging algorithm. We discuss the results
within the context of a cross-section measurement, as well as a search
for charged Higgs boson in top quark decays.
https://www.pas.rochester.edu/urpas/high_energy_physics_seminar_12
10/14 Sarada
Rajeev, University of Rochester
Title: "Solitons in Little Higgs Models"
Abstract:
Just as pions are made of quarks, it
is possible that the Higgs
bosons are made of some smaller particles. The original
proposals of this sort
("Technicolor") were ruled out by precision electro-weak data. "Little Higgs"
models of Arkani-Hamed et. al. avoid this fate by clever cancellations
of radiative corrections. It
is expected that the LHC will be able to test some of these models. If the Higgs bosons are like pions, do
these models leas to analogues of baryons in the electroweak sector; i.e.,
additional particles (could be fermions or bosons depending on
details) made of the same stuff as Higgs bosons? Baryons can be explained
as topological solitons of
pions. Soour question becomes, are there similar solitons in Little Higgs models? I will answer this
question in a version of these models due to Chris Hill and Richard
Hill at Fermilab.
https://www.pas.rochester.edu/urpas/high_energy_physics_seminar_6
Tuesday
10/21/08 -
Mark Trodden, Alumni
Professor of Physics, Syracuse University
Title: "Gravitational
Approaches to Cosmic Acceleration"
Abstract:
Among the possible
explanations for the observed acceleration of
the universe, perhaps the boldest is the idea that new gravitational
physics might be the culprit. In this seminar I will discuss some of
the challenges of constructing a sensible phenomenological extension of
General Relativity, give examples of some candidate models of modified
gravity and survey existing observational constraints on this approach.
I will conclude by discussing how we might hope to distinguish between
modifications of General Relativity and dark energy as competing
hypotheses to explain cosmic acceleration.
https://www.pas.rochester.edu/urpas/high_energy_physics_seminar_11
Tuesday 10/28/08 Sourabh
Dube, Rutgers
TITLE: "Search for Supersymmetry using the Trilepton signature"
Abstract:
Using 2.0fb-1 of integrated
luminosity collected by the CDF II experiment at the Tevatron ppbar
collider at root(s)=1.96TeV,
we present a search for
supersymmetry using the three lepton and missing energy signature of
chargino-neutralino production.
We expect to see approximately 11
supersymmetric events for a suitable choice of parameters in the mSUGRA
model. Our observation of 7 events is consistent with the Standard
Model expectation of 6.4 ± 1.1 events. We rule out chargino
masses up to 145 GeV/c2 in certain mSUGRA regions and present an
exclusion region in mSUGRA parameter space. We also present a method to
extract model-independent results from this search.
https://www.pas.rochester.edu/urpas/high_energy_physics_seminar_16
Tuesday 11/4/08
Carsten
Rott, Ohio State
Tile: Indirect Searches for Dark Matter with IceCube
Abstract
High energy neutrinos are unique
messengers, traveling cosmic distances without being absorbed or deflected,
that offer a new perspective
on the high-energy
universe. The IceCube neutrino observatory is an ice-Cherenkov detector currently
under construction in the deep,
clear ice beneath the
geographic South Pole for the detection of these particles. It is a multi-purpose experiment that
can not only be used to look
cosmic neutrino sources, but also study atmospheric neutrinos, cosmic-rays, or search indirectly for
dark matter, to name a few.
After a brief introduction to the IceCube detector and Deep Core, a new subdetector that will be especially
sensitive to neutrinos with energies below a TeV, I will summarize the main physics
results. After that the talk will focus on indirect searches for dark matter and will
conclude with an outlook into future discovery potentials.
https://www.pas.rochester.edu/urpas/high_energy_physics_seminar_13
Tuesday 11/11/08
- Pablo D. Goldenzweig, University of Cincinnati.
Title: Recent Results on B->VV Decays at Belle
Abstract:
The study of B-meson decays to
hadronic final states tests our
understanding of both weak and strong interactions. Specifically,
B-meson decays to two vector
mesons can shed light on the helicity structure of weak interactions through polarization
studies. These decays yield
important constraints on the unitarity triangle and can probe for new physics phenomena. In this talk, I will
present recent results for the
charmless vector-vector decays B0->wK*0 and B0->rho0rho0 using
the worlds largest data set
of BB(bar) pairs collected with the Belle detector at the KEKB e+e- collider. An overview of the
analysis techniques will be
presented along with the branching
fractions for the b->s penguin dominated B0->wK*0 and non-resonant
B0->wK+pi- decays. A first measurement of the longitudinal polarization
fraction for wK*0 decays will also be presented, along with a discussion of
both SM and possible new physics interpretations. For B0->rho0rho0
decays, I will present Belle's
measurement of the branching fraction and CKM angle phi_2.
https://www.pas.rochester.edu/urpas/high_energy_physics_seminar_17
Tuesday
1/18/08 -
Ron Poling , U Minnesota
Title: "All Hail CESR (and
CLEO) - Thirty Years Shaping the Standard Model".
https://www.pas.rochester.edu/urpas/high_energy_physics_seminar_7
Tuesday 11/25/08 Jiyeon Han,
University of Rochester
Title: The Differential Cross
Section Distribution of Drell-Yan Dielectron Pairs in the Z Boson Mass
Region (Public Talk followed by closed PhD. Defence);
Abstract
We report on a measurement of
the rapidity distribution, dsigma/dy, for
Z/Drell-Yan to e+e- events produced in pbar p
collisions at sqrt{s}=1.96 TeV. The data sample consists of 2.13
fb^(-1) corresponding to about about
160,000 Z/Drell-Yan to ee candidates in the Z
boson mass region collected by the Collider
Detector at Fermilab.
The dsigma/dy distribution, which is measured over the full
kinematic range for
e+e- pairs in the
invariant mass range 66<M_e+e-<116 GeV/c^2, is
compared with theory
predictions.
There is good agreement between the data and predictions of
Quantum Chromodynamics in
Next to Leading Order
with the CTEQ6.1M Parton Distribution Functions.
https://www.pas.rochester.edu/urpas/particle_physics_seminar_proceeded_by_phd_defense
12/2/08 No seminar
Tuesday 12/9/08
- Lynne
Orr, University of Rochester
Title: "Top at Future Hadron Colliders".
https://www.pas.rochester.edu/urpas/high_energy_physics_seminar_15
Spring 09
Tuesday 1/20/09, Urlich
Baur,
University of Buffalo
https://www.pas.rochester.edu/urpas/high_energy_physics_seminar_8
Title: Precision physics at the LHC
Abstract:
I discuss the
prospects for measuring the W boson mass, the W width, the weak mixing
angle, and the Higgs boson couplings at the LHC. Particular emphasis is
given to the status of theoretical calculations relevant for these
measurements.
Tuesday 1/27/09 Cristiano Galbiati, Princeton
http://www.pas.rochester.edu/urpas/particle_physics_seminar_0
Title: Noble liquids - The
revolution in direct dark matter searches recent results from borexin
Abstract:
"Noble liquid detectors are changing
in a fundamental way the field ofdirect dark matter searches.
They feature excellent discriminationbetween minimum ionizing events -
due to background radioactivity -and nuclear recoils - the signature of
WIMP dark matter interactions-. Their unmatched promise of a
rapid scaling of the target mass (by 2-3 orders of magnitude!) and of a
corresponding increase in sensitivity is driving a large number of
researchers into the field: it's the 21st century gold rush of
astroparticle physics. Will they provide the first successful
exploration of the dark sector? Finally, I will present very recent
results from the Borexino solar neutrino experiment. I will also
discuss how the technology developed in the context of solar neutrino
searches will impact future direct dark matter searches."
Tuesday
2/3/09 , Open
Tuesday 2/10/09- Jodi
Cooly, Stanford University
Tuesday 2/17/09, open
Tuesday 2/24/09, Amanda Weinstein UCLA
Tueday 3/3/09 - Jonghee Yoo,
Fermilab
Title : The first CDMS five tower
results and the solid xenon project
Abstract :
The Cryogenic
Dark Matter Search (CDMS) is originally designed searching for Weakly
Interacting Massive Particles (WIMPs)
with
low-temperature crystal detectors that are able to read out both
ionization and phonon signals. However the same detector can also be
used for solar
and Galactic axion search. In this talk I will present results of dark
matter search, and the first results of solar and
Galactic axion
search using the CDMS detectors. I will then discuss a next generation
multi-purpose detector R&D, the solid xenon project.
Tuesday 3/10/09 - No seminar Spring Break
Tuesday 3/17/09 - OPEN possible seminar (now No
seminar - APS meeting)
Tuesday 3/24/09 open
Tuesday 3/31/09 Cynthia
Keppel,
Hampton University and Jefferson Lab
https://www.pas.rochester.edu/urpas/high_energy_physics_seminar_14
THURSDAY 4/2/2009 - Special
HEP Seminar Dave Toback (Texas A&M)
http://www.pas.rochester.edu/urpas/special_high_energy_physics_seminar_0
Title: The search for supersymmetry at CDF
Tuesday 4/7/09 Steve Ritz, NASA
Title: Fermi Mission Results, Status, and Plans at GLAST
https://www.pas.rochester.edu/urpas/high_energy_physics_seminar_9
Tuesday 4/14/09 Toichiro Kinoshita, Cornell
Title: Tackling the $\alpha^5$ term of the electron g-2: Progress
Report"
https://www.pas.rochester.edu/urpas/high_energy_physics_seminar_19
T
uesday 4/21/09 William Wester,
FNAL
Title "Recent advances in the detection of heavy quark hadronic
states" (from CDF data).
https://www.pas.rochester.edu/urpas/high_energy_physics_seminar_18
Wed 4/22/09 Geumbong Yu, Department of Physics and
Astronomy, University of Rochester
Title: Search for Charged Higgs Bosons in Decays of Top Quarks
in Proton-Antiproton Collisions at Sqrt(s) = 1.96 TeV (Also
PhD Thesis Defense)
Abstract:
We report on
the first direct search for charged Higgs bosons in decays of top
quarks in pbar-p collisions at Sqrt(s) = 1.96 TeV. The search
uses a data sample with an integrated luminosity of 2.2 fm-1 collected
by CDF II detector at Fermilab, and looks for a resonance in the
invariant mass distribution of two jets in the lepton+jets sample
of t-tbar candidates. We observe no evidence of charged Higgs
bosons in top quark decays; hence 95\% C.L. upper limits on the
branching ratio, B(t -> H+ b) in assumptions of B(H+
-> C sbar = 1.0 and B}(t -> Wb)
+ B(t -> H b) = 1.0, are placed at 0.1 to 0.3,
corresponding to charged Higgs boson masses of 60 Ge B(t -> H+ b)
can also be used as model independent limits on the decay branching
ratio of top quarks to any charged scalar bosons beyond thestandard
model.