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IPM Calendar
Positions in the
School of Particles and Accelerators
LHC News
ATLAS and CMS experiments present Higgs search
status
(December
13, 2011)
In a seminar held at CERN today,
the ATLAS and CMS experiments presented the status
of their searches for the Standard Model Higgs boson. Their
results are based on the analysis of considerably more data than
those presented at the summer conferences, sufficient to make
significant progress in the search for the Higgs boson, but not
enough to make any conclusive statement on the existence or
non-existence of the elusive Higgs. The main conclusion is that
the Standard Model Higgs boson, if it exists, is most likely to
have a mass constrained to the range 116-130 GeV by the ATLAS
experiment, and 115-127 GeV by CMS. Tantalising hints
have been seen by both experiments in this mass region, but
these are not yet strong enough to claim a discovery.
Full Story
in English
Full Story in Persian
Following the
OPERA collaboration's presentation at CERN on 23 September,
inviting scrutiny of their neutrino time-of-flight measurement
from the broader particle physics community, the collaboration
has rechecked many aspects of its analysis and taken into
account valuable suggestions from a wide range of sources. One
key test was to repeat the measurement with very short beam
pulses from CERN. This allowed the extraction time of the
protons that ultimately lead to the neutrino beam to be measured
more precisely.
CERN has 2020 vision for LHC upgrade
(November
16, 2011)
CERN1 today
kicked off the High Luminosity LHC study with a workshop bringing
together scientists and engineers from some 14 European
institutions, supported through the European Commission’s
seventh Framework programme (FP7), along with others from Japan
and the USA. The goal is to prepare the ground for an LHC
luminosity upgrade scheduled for around 2020. Luminosity gives a
measure of the collision rate in a particle accelerator and
therefore gives an indication of its performance. Full
Story
LHC proton run for 2011 reaches successful
conclusion
(October
31, 2011)
After some 180 days of running and four hundred
trillion proton proton collisions, the LHC’s 2011 proton run
came to an end at 5.15pm yesterday evening. For the second year
running, the LHC team has largely surpassed its operational
objectives, steadily increasing the rate at which the LHC has
delivered data to the experiments.
Full Story
OPERA experiment reports anomaly in flight time
of neutrinos from CERN to Gran Sasso
(September 23, 2011)
The OPERA1 experiment,
which observes a neutrino beam from CERN2 730
km away at Italy’s INFN Gran Sasso Laboratory, will present new
results in a seminar at CERN this afternoon at 16:00 CEST. The
seminar will be webcast at http://webcast.cern.ch.
Journalists wishing to ask questions may do so via twitter using
the hash tag #nuquestions, or via the usual CERN press office
channels.
Full Story
CERN's LHCb experiment takes precision physics to
a new level (August 26, 2011)
Results to be presented by CERN1’s
LHCb experiment at the biennial Lepton-Photon conference in
Mumbai, India on Saturday 27 August are becoming the most
precise yet on particles called B mesons, which provide a way to
investigate matter-antimatter asymmetry. The LHCb experiment
studies this phenomenon by observing the way B mesons decay into
other particles. The new results reinforce earlier measurements
from LHCb presented at last month’s European Physical Society
conference in Grenoble, France, showing that the B meson decays
so far measured by the collaboration are in full agreement with
predictions from the Standard Model of particle physics, the
theory physicists use to describe the behaviour of fundamental
particles.
Full Story
CERN’s CLOUD experiment provides unprecedented insight into
cloud formation
(August 25, 2011)
In a paper published in the journal Nature today,
the CLOUD1 experiment
at CERN2 has
reported its first results. The CLOUD experiment has been
designed to study the effect of cosmic rays on the formation of
atmospheric aerosols - tiny liquid or solid particles suspended
in the atmosphere - under controlled laboratory conditions.
Atmospheric aerosols are thought to be responsible for a large
fraction of the seeds that form cloud droplets. Understanding
the process of aerosol formation is therefore important for
understanding the climate.
Full Story
Weekly
Topical Seminar: IPM@CMS Meeting
This meeting
is held every Tuesday 13:30-15:30. The meeting is an
on-line meeting between School of Particles and
Accelerators in Larak and our group at CMS in Geneva.
The connection is via the EVO (http://evo.caltech.edu/)
technology and in the CMS community. The meeting is with
no password and everybody is welcome to attend.
Full Story
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Weekly Seminar on " Top
quark anomalous couplings in single top events "
Speaker: Dr.
Abideh Jafari from IPM
Abstract:
New
interactions at higher energies may manifest themselves in the
form of effective couplings of SM fermions. In this context, top
quark as the heaviest fermion of the Standard Model, plays an
important role since it decays before hadronization. The quark
information, like spin, is therefore not lost and is accessible
in decay products. It decays almost all the time to a b-quark
and a W-boson and provides an interesting area to study the Wtb
vertex in search for new interactions. Wtb vertex is involved
also in the production of top quark (single-top), giving another
place to investigate the anomalous couplings. The Large Hadron
Collider is a top quark factory. Hence, precision measurements
using top quark events are possible with enough statistics.
I will present a research proposal on this subject in which all
event information is used to build a likelihood to obtain the
most probable values for the Wtb anomalous couplings in
single-top.
Time: Wednesday, February 8, 2012 at 14:00
in
Larak
سمینار یک روزه
آشنایی با شتابگر خطی
Presentations
files
Two
new lectures
Prof. Daniel Grumiller from Vienna University of Technology
1- IPM Colloquium on "Gravity in lower dimensions"
Abstract:
He gives an introduction to gravity in two and three dimensions
and address what we can learn from these theories for classical
and quantum gravity.
Time: Monday, January 30, 2012 at 14:00
in Niavaran building
2- Weekly Seminar on " The
AdS/log CFT correspondence"
Abstract:
I summarize the evidence accumulated so far in favor of a
correspondence between certain fine-tuned gravity theories in 3
dimensions and logarithmic conformal field theories in 2
dimensions. I also address recent generalizations of this
correspondence to higher spin gravity and higher-dimensional
gravity theories and mention possible applications to condensed
matter systems with quenched disorder.
Time: Thursday, February 2, 2012 at 11:00
in
Larak
Second IPM School and Workshop on Applied
AdS/CFT
May 1-8, 2012
The
Second Ali-Mohammadi Prize
For the best physics PhD
theses written in Iran
The Institute for Research in Fundamental Sciences (IPM) in
collaboration with the Physics Society of Iran shall give a
prize annually to the best PhD theses in physics written in
Iran. The prize will be called "Ali-Mohammadi Prize" in
recognition of the scientific and academic services rendered by
the late martyred professor of the University of Tehran, Mas'ood
Ali-Mohammadi, the first recipient of a PhD degree from an
Iranian university, who had an influential role in creating the
scientific infrastructure of IPM as well as the establishment of
graduate studies in Iranian universities and academic
institutions.
Full Story
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