Tara Shears - Latest News from the LHC

Latest news from the LHC

Tara Shears, University of Liverpool

(c) CERN

To understand the universe

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e μ τ

νe νμ ντ

u c t

d s b

quarks leptons

The universe?

Latest news from the LHC Tara Shears, University of Liverpool

e μ τ

νe νμ ντ

u c t

d s b

quarks leptons

W ZWeak : bosons


e μ τ

νe νμ ντ

u c t

d s b

quarks leptons

EM: bosons


u c t

d s b

quarks

e μ τ

νe νμ ντ

leptons

gStrong: bosons


e μ τ

νe νμ ντ

u c t

d s b

quarks leptons

(and gravity) ?


nice …

BUT

(1) What is mass?

…property mediated by

“Higgs Particle”


(1) What is mass?

…property mediated by

“Higgs Particle”


nb …… we haven’t seen it yet …..

???

(2)


matteranti

Big Bang: equal amounts of matter and antimatter created

Now: we (matter) exist

Why?

(3) and the other 96% ?


Many questions….

What is mass?

4 forces?

What about gravity?

Where did all the

antimatte

r go?

Mini black holes?

How many dimensions?

What about the other 96% of the universe …..


12 matter particles?

Founded in 1954

20 member countries

More than 9,000 scientists

Over 100 nationalities


European Laboratory

for Particle Physics

LHC:2 beams of protons collide 40 million x a second at near light speed 100m underground

27 km

Recreating conditions when universe was a billionth of a second old ……

© C

ER

N

© CERN


Images (c) CERN

How does it

Work?


Image (c) CERN

Identify particles by characteristic signatures in experiment

Add computers: calculate particle paths and energies

Add theory: infer what fundamental process happened


Image (c) CERN

© S

TF

C

Image (c) STFC

…..to grid

Image : http://rtm.hep.ph.ic.ac.uk

Is it

Working?

[yes]

(c) CERN

What is the LHC doing

now ?

1bunch x 1bunch at start

~400x400 in 11/10

2808x2808 ultimatelylead ion collisions for final month.1308x1308 summer 11 onwards


…. start with snapshots


First results

Image (c) CERN

First results

The strong force:We see quarks produced as predicted

The Standard Model works so far …


The electroweak force:We see W and Z bosons produced as predicted

The Standard Model works so far …



Image : http://www.particlezoo.net:

The electroweak force:We see top quarks – the heaviest known particles.

The Standard Model works here too …


So where is it?

According to the theory….


Higgs?

Higgs?

We need a lot of data. What we think might happen...


7/11

Atlas and CMS search results reported.

Was this the first hint of Higgs …


Higgs?

Image : http://www.bbc.co.uk/news

8/11

Atlas and CMS search results updated

Was this the first hint of Higgs …


Higgs?

And beyond the Standard Model?

… still looking….



… susy….



General searches:LHCb Bs μμNothing untoward seen yet


The early universe?

Study using heavy ion collisions in LHC.See weird correlations.

A new phase of matter?


Latest news at CERN

on antimatter6/2011:Alpha experiment.

Stored 309 anti-H atoms for 1000 sec.

Now we can start to study antimatter directly.


Latest news at CERN

on antimatter

8/2011:LHCb experiment.

Starting to make first measurements of matter and antimatter particles.

Now we can start to study antimatter indirectly.


Latest news at CERN/ Gran Sasso

on speedy neutrinos

9/2011:Opera experiment.

Measured neutrinos travelling at 7km/hr faster than light.

What is happening there?


(BBC2 Horizon,iPlayer)

Data-taking continuously until late 2012® LHC energy upgrade.

Now: collecting more and more dataExperiments well understoodResults streaming outExpect very interesting results to come ….


What’s happening

Next?

? ………. wait and see ……….

What will we find?

Tara Shears - Latest News from the LHC

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