And I will also intervene three minutes before the talk to the end of the talk.
Thank you.
Thank you very much. Can you hear me? Yes.
Okay, great. Can you see my slides here? Sure.
I am very happy to be presenting the status of CMS with some perspectives and
and some new results.
See?
And So who are we we're the CMS collaboration. We're now 237 Institute's
in 55 countries. And when I was preparing this talk, I was thinking, we're in 2020.
And maybe 2020 is a little different than what we had expected. But one of the
things that you know, we celebrated this year was, this was since the last lacp. We
have the 10th anniversary of collisions, you know, at CMS and at the LSE. So We had
wanted to have a party at our last collaboration meeting, but we have a
virtual on toast to the LMC instead. And looking back in what else has happened
over the last year, we had our collaboration meeting in Thailand where we
many of us got to meet or boil Highness The princess of Thailand during our CMS
week. That seems like a very long time ago. So we have lots of plans coming for
2020 we were in the middle of completing the long shutdown work very much in the
middle of it and everything was making good progress. Preparing for run three and
I highlight here on the side on the work we've been doing to try to include GPUs in
the HL T and trying to figure out how to make that improvements in in the online
new construction to take advantage of the GPS And, of course, preparing for the HSC
and getting ready for conferences and publishing papers. And But, as you will
know, things are a little bit different than what we had planned for. And we're,
at the end of February, really
took a deep breath and
looked at the situation and we moved I know all our meetings to virtual like
we're doing for this conference in the beginning of March, and had a big
collaboration meeting at the end of March, which went well. We put CMS into safe mode
and everyone started teleworking. And right now we're very much in the startup
phase again and doing the slow restart. We've warmed up the magnet, and we're
bringing back the laboratories on the CERN site, and you know, where most people are
still teleworking. Of course is a world situation not just the same situation. But
this is where we are at this point of trying to work on me getting back to work
as much as we can but maintaining sort of the priority of the health and safety of
all the people and I think was mentioned before, that is their discussion of the
schedule on Juni. So, just a quick overview of what's been going on in LS to
where last year we did a lot of work on the new ons and with h Cal where we
finished up the phase one upgrades of the of the readout and immune systems we've
been doing work which is more related towards HL hc and even have installed our
first level first phase two detector, the one layer of the of the G of the john
chambers. The second one is to be installed later. So things are, as has
been mentioned before, of course have been delayed since since March but we're
getting back to it and we'll be working on you know, completing all the Milan
upgrades the beam pipe installation, and preparing to put in the pixels with a new
layer one pixel detector. And, and of course, we're reevaluating that schedule
right now. So let's move on to some physics results in here. I'm trying to
give a highlight of recent results. So it'll be sort of
rush through many of our recent
analyses that have come out for this conference or in the last few months.
We are poised to reach our one milestone of 1000 papers overall where we have about
we have 969 papers submitted on collect data. And we had hoped to have a party at
the next collaboration meeting to celebrate the 1,000th paper but we'll have
to be doing that virtually or in person in some leader to. And I just point out that
the LFC club races have gotten to be very experts in machine learning. In fact, two
of our papers have been published or accepted for publication and machine
learning journals.
So the first
result of highlight is the first observation visa vest x 3872 five decay
mode. And this is of course, x 3872 is an interesting state that people have want to
learn more about and so we've been looking at how it's produced for raid decays of
different behead bronze and here, we look at the ratio with respect to age This
production of the SDK with respect to a normalization channel, which is the side
to s channel. And the top plots here are the this reference channel on the bottom
is for the signal to be submitted to x 3872 five, and we measure this ratio. And
what's interesting to see here is that this measure sort of wrenching ratio
fraction for B sub s is similar to the one for B zero, but only about half of the one
four for the B plus and
that's
something to be followed up on
here. So another measurement is tough work Cal Cal are compelling coming from Tiki
Bar dialect on a case. And here we make use of the effects of virtual Higgs boson
exchange on Monday. To bar kinematics to extract information about the coupling
strength from the kinematic distributions, and so these events are to leptons was to
be jets. And it's this is from the full run to data sample. And you can see in the
leftmost plot sort of the sensitivity of this coupling strengths as compared to the
standard model of value. And this is the plot for the for the mass of the and then
here is the likelihood scan from the fit. And then the once you make the fit in have
the the best fit value, you comparing the data of Monte Carlo for this and you've
been able to
determine the
coupling strength with setting a limit where it's going to be less than 1.62 or
the measurement of 1.16 plus point two four minus point three six. And this
measurement is sort of an alternative to the Tth method, which assumes other
additional
Standard Model were engineering issues.
So all highlights of this year is sort of multi bows on production and you hear me
look at the tribals on production and look tonic final states. And this is the first
observation of tribals on production. It's a full run to analysis we're looking at
you know, three to six leptons or two same charge, leptons plus two jets. And it was
done in two analyses both the cut base and DDT analysis. And of course, there are
several categories defined to optimize the sensitivity and you see this sort of data
versus Monte Carlo expectations in all the categories here in the same charge three
laptops, In four or five, six leptons. In the end, the results are consistent with
the standard model and the triples on production is observed with 5.7 standard
deviations or 5.9 was expected. And also individually, there's evidence for the www
production and WWE production
where
you can see the results in this plot and also in the table over here.
We've also been looking at vector bows on scattering die bows on production where
you're looking for two forward jets and two, two bosons in the central region. And
here we have new results in in z and w gamma, where we have the first observation
of electro reproduction of W gamma with an observed two Difference of 5.3 standard
deviations with the expected was 4.8. And this was done with combining the results
from 2016 with ATV results previously published, and obviously that the
challenges here are the small cross sections. But we've now made measurements
of the same side WW, the W z, and we have evidence for for z z and have used these
to set limits on an almost quarter gauge couplings. Were here you see the mass plot
for W gamma. The limits are how you set the constraints. And here I've quoted some
of the limits where the sensitivities are particularly good in ta in T nine. And
here you see the evidence for for the zz production
in the middle
also made measurements of TT h or h goes to gamma gamma and its CP structure were
hydronic and atonic topic caeser are addressed and BDT is used to categorize
the events. The signal is extracted from the simultaneous fit in all categories.
And for the CP studies the categories are defined using vt and CP discriminant zero.
So, here we have observed TT TT h h gamma gamma is observed at 6.6 sigma and the
pure CP odd coupling is excluded at 3.2 sigma
also made measurements of
that differential Tiki Bar cross sections were on the production cross sections for
PT top pairs and we require you one to be a hydronic top two k which is
characterized by a large radius jet with PT greater than 400 gV. And the second one
is either another large radius jet. So that's an all hydronic decay or, or you
love the top to be electronic decay. And we present the results it's a particle
level where I have those plots here. And here for the electronic channel, I have
the parts on level and in from looking at these and comparing the distributions to
theoretical models, we find that the absolute cross sections that are measured
are lower than then the predictions from the models and but the normalized
distributions as well.
Moving on is another one that uses of substructure as a search for boosted
Hagen's came to BP bar. This is an inclusive search and we look for Higgs
bars a single large radius yet and here we divide the events into six PT categories
between 450 and 1200 gV. The selection uses substructure and double B tagging and
the signal strength is a fit to the things that don't pass the fail the B tag and
pass the the B tag and bend in
the massive Sapa soft rock mouse in the PT and here we measure the signal strength of
any see it here in the in the green in the green band and the various according to
various speeches.
So moving on with her things that you use of jet substructure, we did a search for
Suzy and boosted debose ons pleasant that were here it's a search for two highly
boosting z bozos decaying into headwinds as Matt B uses wide cone jets with nos
compatible with the Z. Again we're using the full run to data sample and here we
can set limits on the Gleaner mouse example 1920 gV is excluded at the at the
95% confidence level, but
we've also done a lot of work in looking at long for long lift particles and this
is the result looking in displays jets where the search is for displaced tracks
in a digest system. And here we've done this analysis using the 2017 2018 analysis
and then combined for the results with 2016. Of course, we're looking for
displays for vertices very high purity tracks. And this is something that is used
to set limits on many, many models. I just put them several of them here in diagrams,
and if you set the in simplified jet jet model, you can see the limits here, where
this is going from one millimeter up to 10 meters, and we're excluding and gluing it
Galena masses are less than 2450 for detail from six to 500 millimeters, for
example, and then also a limit on stop masses. Here we have to Vito in this for
this analysis. As you know the structure of the of the pixel detector to make sure
that we're not including any nuclear interactions, this analysis we also did a
search for disappearing tracks at 13. tv which is search for long live charged
particles that decay within the tracker. So we look for something in the silicon
tracker where you have a track and then missing out or hits and then nothing in
the kilometers. And this is where you can see here the set limits are excluded up to
884 gV for the lifetime of three nanoseconds for using this kind of search.
We've also done a search for direct stop pair production on the thigh leptons. And
here we're looking for two opposite sign up tons of B jets and met and once again,
the results here are consistent with the expected background. And they can be
interpreted in, in several simplified models. Here you see the comparison data
Monte Carlo. And then you see the limits in this simple model here with a stop to
do a top neutralino. And you see this is analysis as the in purple, where this, the
strength of this analysis is coming from these cascade decays, which you see up
here, where you can set much higher limits, going up to 1.4, gv, and up to 900
gV for the lightest neutrally. Switching back to we were looking at last year, the
first run to result we had from CNS was his observation of the, the double peak of
excited, he succeeds. And here, we actually look back at this and do this
measurement of the cross section ratios of measuring the the B sub c to s relative to
the BC and measure these, these ratios, and then the ratio of ratios between these
two states
two or three minutes before the end of your talk, thank you.
And then you also have a measurement of CP violating phase five is in BC best JCI kk.
And
this is a
time to find clever tag Angular analysis using a dedicated trigger and it includes
the 2017 and 2018 data, but also has an improved opposite side tagging mechanism
with tagging method using machine learning techniques and it's a substantial
improvement on the Compared to our ATV measurement, where you see the ATV
measurement here, and then the this is the 13th ci measurement and the red is the
combined CMS measure. And finally, we have evidence for the top pair production in
red lead conditions that was came out several months ago. And this is the first
set of strong evidence for top Quark pair production and live lead and it follows
the first observation that was done in p lead previously in 2017.
So, well in the last few minutes that I have, I thought that I would talk a little
bit about the future and
show you what our upgrades were. We been busy over, getting ready for only 413. But
getting ready for the HL hc. And this year, we've produced a new TDR on
describing our level one trigger and then looking forward to TDR for next year while
I'm on it h o t and DAC. So this is a sort of outline of the full upgrade. It's, it's
lots of nice detector technology, things are going well so far we've also been
looking at an improvement for the Ford system that precision proton spectrometer
known as PPS where we have an expression of interest which has been completed and
is circulating in the collaboration. What you see here on the right is what the
upgrade people have been doing over the last few months has been read doing the
schedule and this is their schedule for each of the sub detectors which I will
show you in great detail, but I will show you that we have been evaluating the
schedule. This is of course pre COVID. So went through every sub detector every
design for the the upgrades, and to making sure that we could get to installation and
commissioning during LS three, and get ready for the run for. So this is this has
been a lot of work and now we're going to be revising it as we learned about the
impacts of code. So as I said that there's a TDR coming for the hlt and DAC and also
for Braille for the luminosity monitor. It's coming in 2021. And then after that,
we'll be working on the computing technologies. So just a won't go through
all of this but this shows you that there's been a lot of technical progress
going on here with the tracker on. And on many trackers tracker or several outer
tracker modules were built for the test feed There's outer sensor production,
battery tracker sensor production going on, and Hamamatsu. And we're currently
building an order of 100 pixel modules for system tests. And for the Ford color
emitter, there's lots of work, understanding meeting centers and getting
the final prototypes ready for the barrel, calorimeter electronics catches in hand
and the other chip, like DTU is submission is imminent. For the timing detector, the
barrel a stick is back from the foundry. And the first gen prototype for the layer
which is me called me zero is the first prototype module. You can see it here in
this picture. So there's also getting ready for procurements of silicon sensors
and materials. And it has all happened over the last few months, some of them
virtual review. So I wanted to end with this That just to leave you saying that
CMS have been progressing well and on time with our LS two activities, we were and
had completed several very important goals, which is, each Cal upgrade was
completed and the first gem disk was installed. Before we moved into safe mode
in mid March concern, worldwide work life has not been business as usual. We
management have been very impressed by the resilience of our collaborators and their
willingness to support each other, as we all support our families, friends and
community. I think we've learned learned how to telework and even how to be better
global collaborators through this. It is not yet clear how this will really shape
our work in the future. Research is underway at CERN with critical oils to
activities and upgrade tasks moving ahead on site. But as you can see that many many
activities including lots of physics analysis, which I showed here, are
happening through teleworking, and this we want Make a big thank you to all our
students, postdocs, faculty, scientific staff, computing experts, engineers,
technicians, admins, everyone else for really being able to make this happen. And
we're very excited to present our results this week, you're going to hear a lot more
detail on many of the things I talked about from other speakers. And we have
ambitious plans for three and beyond. Thank you.
Thank you, Patricia, for this very nice talk. And I think we have one question
from Mark.
So
okay.
Hello, do you hear something? Yes, we hear you. So you pitch that it's about pitch 10
and get back there, I will get there.
So pitch 10
Values question which is equivalent to if you could give some commands on the
following. So, was the correlation between the two variables quantified? Is the 2d
PDF genuine or easy to produce of one DPF? And if not, it means if you did a project,
or was a coalition consider between the two variables. Thank you.
Okay, I'm not sure I have the answer to those questions.
Maybe we can take that offline or maybe there's someone who's
maybe another diesels this one. Well, there is one person who raised his hand
Wolfgang maybe knows the question, but the answer here it's a quick please because
this can be an oar in the barrel position. Imagine it would be presented. Yeah. It
has been factorized and has been verified that this is Decision advocate approach.
Okay, so you can certainly talk offline or around the parallel session. We have time
for maybe one more question.