High Energy Physics Seminars 2003
Schuster Colloquia: 2.303.30pm, Bragg Lecture Theatre
Normal seminar coordinates: Wednesdays 23pm, Moseley Lecture Theatre
Wednesday 24 Sept  Dr Beate Heinemann (CDF  Liverpool)  Experiment 
Tuesday 30 Sept, at
3pm Blackett Lecture Theatre 
Dr Jenny Thomas (UCL)  Experiment 
Wednesday 8 Oct, 2.30pm  Dr John Ellis FRS (CERN)  SCHUSTER COLLOQUIUM 
Wednesday 15 Oct  Dr Nikolaos Kidonakis (Cambridge)  Theory 
Wednesday 22 Oct  Dr Apostolos Pilaftsis (Manchester)  Theory 
Friday 24 Oct Niels Bohr Common Room 
Dr Carlo Oleari (Durham)  Theory 
Wednesday 29 Oct  Dr Judith McGovern (Manchester)  Theory/Experiment 
Wednesday 5 Nov  Dr Gavin Salam (Paris)  Theory 
Wednesday 12 Nov, 2.30pm  Prof Helen Gleeson (Manchester)  SCHUSTER COLLOQUIUM 
Wednesday 19 Nov  IOP halfday meeting on B physics 
Monday 24 Nov at 3pm Bragg Lecture Theatre 
Dr Agustin SabioVera (Cambridge and Hamburg)  Theory 
Wednesday 26 Nov  Dr Albrecht Kyrieleis (Manchester)  Theory 
Wednesday 3 Dec  Dr Athanasios Dedes (Durham)  Theory 
Wednesday 10 Dec, 2.30pm  Prof Hugh McCann (UMIST)  SCHUSTER COLLOQUIUM 
Tuesday 16 Dec 4.30pm Venue: TBA 
Dr Stefan SoldnerRembold (Manchester)  Experiment 
Wednesday 17 Dec  Dr Nick Barlow (Manchester)  Experiment 
Abstracts
An overview over the CDF experiment at the TeVatron at Fermilab near Chicago is given. Socalled Run 2 which aims at accumulating more than 20 times more data than Run 1 has started about two years ago and I will present some of the recent results based on an integrated luminosity of about 120 pb1. The focus will be on new measurements in the electroweak, top and QCD sector and their relevance to the physics at the LHC at CERN.
15 Oct, N Kidonakis:
I present a unified approach to calculating the
nexttonexttoleading order (NNLO) soft and virtual QCD
corrections to cross sections for electroweak, Higgs, QCD, and
SUSY processes. I derive master formulas that can be used for
any of these processes in hadronhadron and leptonhadron
collisions. The formulas are based on a unified threshold
resummation formalism and can be applied to both total and
differential cross sections for processes with either simple or
complex color flows and for various factorization schemes and
kinematics.
I present detailed phenomenological results for top quark
production at the Tevatron and for direct photon production. I
also briefly discuss the production of charged Higgs bosons;
massive electroweak vector bosons; top quarks via
flavorchanging neutral current processes; and squarks and gluinos.
22 Oct, A Pilaftsis:
I briefly review the theoretically appealing scenario of baryogenesis
through leptogenesis induced by the outofequilibrium decays of heavy
Majorana neutrinos. Recently, it has been found that if two of the
heavy Majorana neutrinos have a mass difference comparable to their
decay widths, then the phenomenon of separation of leptons from
antileptons gets resonantly amplified. Hence, this scenario has been
called resonant leptogenesis. We show that resonant
leptogenesis can be realized with heavy Majorana neutrinos even as
light as 0.51 TeV, in complete agreement with the current solar and
atmospheric neutrino data. The prospects of testing this novel
scenario of baryogenesis in lowenergy and collider experiments are
briefly discussed.
24 Oct, C Oleari:
The vectorboson fusion process is expected to provide crucial information
on Higgs boson couplings at the Large Hadron Collider at CERN. The
achievable statistical accuracy demands comparison with nexttoleading
order QCD calculations, and the capability to disentangle the signal from
the backgrounds.
I present the calculation of these corrections and the kinematical cuts
to apply to suppress the backgrounds.
5 Nov, G Salam:
The resummation of logarithmicallyenhanced terms to all perturbative
orders is a prerequisite for many studies of QCD final states. Until
now such resummations have always been performed by hand, for a single
observable at a time. In this seminar I will discuss the physical
basis for such resummations and show how to exploit this understanding
to allow a computer program to automatically carry out resummations
for arbitrary observables. Novel applications include the first
nexttoleading logarithmic resummations of event shapes in dijet
production at hadronic colliders.
26 Nov, A Kyrieleis:
The high energy limit is of particular importance for the understanding of
the transition from perturbative QCD to hadron physics. In this limit,
calculations at fixed order of the coupling are insufficient,
contributions from all orders of the coupling have to be considered. The
BFKL approach which allows to resum all these
contributions is discussed. This approach implies the notation of
impact factors incorporating the properties of the scattering
particles. The NLO corrections to BFKL have turned out to be
important. The photon impact factor at NLO will allow for the first
stringent test of NLO BFKL. In particular the real
corrections to this impact factor and first numerical results are
addressed.
3 Dec, A Dedes:
I will present the minimal supersymmetric standard model with
general broken Rparity, focusing on minimal supergravity
(mSUGRA).
I shall discuss:
a) origins of lepton number violation b) scalar potential c)
neutrino masses d) signatures at colliders
17 Dec, N Barlow:
The BaBar detector is situated at the PEPII asymmetricenergy e+e
collider at the Stanford Linear Accelerator Center (SLAC). One of the
primary goals of the BaBar experiment was the precise measurement of
the CPviolation parameter known as sin2beta, which can be cleanly
measured in neutral B decays to charmonium final states. One such
decay mode is B>eta_c K. I will describe a measurement of the
branching fraction of this decay, and give a brief summary of a
timedependent CP violation analysis using this decay channel.
Notes:
For help with AV equipment: Joe Lee, ext 54038 (please give 23 days notice)


Email: jenny@hep.man.ac.uk 
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