All Questions
Tagged with beyond-the-standard-model large-hadron-collider
25 questions
2
votes
0
answers
221
views
What would be the impact of slighty higher mass for the $W$ boson? [closed]
With the recent announcement from CDF
https://cerncourier.com/a/cdf-sets-w-mass-against-the-standard-model/
placing it at the mass at $$80,433.5 \pm 6.4\; \text{(stat)} \pm 6.9\; \text{(syst) MeV},$$ ...
- 4,478
3
votes
1
answer
719
views
Have we ruled out the Minimal Supersymmetric Standard Model (MSSM)?
This question is inspired by a Physics Stackexchange question posted 8 years ago (The future of supersymmetry). The question that I have is very similar to the question in the above link, except that ...
- 673
5
votes
1
answer
117
views
Future Plans for Searches for Supersymmetry in the LHC
Due to the failure of the LHC to discover supersymmetry so far (July 2021), the simplest and the likeliest supersymmetric models (e.g. the MSSM) have been ruled out, and the confidence in ...
- 673
1
vote
2
answers
63
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Why the research of unstable collision particles not present in ordinary stable matter is important in high-energy physics?
What is the point and merits of researching artificial made collision product unstable non natural occurring and not present in ordinary stable matter particles?
Like for example leptoquarks. ...
- 4,370
9
votes
2
answers
230
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Does the recent "3-sigma" result at LHCb account for the number of different tests of beyond standard model physics that have been done?
Recently there has been quite a lot of media interest generated by a reported observation of beyond-standard-model physics at the LHC with a "three sigma" degree of statistical significance.
...
- 193
4
votes
2
answers
296
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Breakthrough at the Large Hadron Collider -Leptoquarks skepticism?
I have came across this recent development in the LHC:
Breakthrough at the Large Hadron Collider: https://www.youtube.com/watch?v=qR6P0aRqYf8
Leptoquarks and leptons - quarks unification:
https://en....
- 4,370
3
votes
0
answers
49
views
What properties of dark matter can we derive from each of the available methods for probing the physics of dark matter?
This is probably a long shot but it's worth trying. My question is the following:
What properties of dark matter can we derive from each of the available methods for probing the physics of dark matter?...
- 373
0
votes
0
answers
33
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How can I build up my knowledge in particle physics to the level that I can calculate the path of elementary particles in a perfect vacuum?
I have to write a research paper (don't know the exact english translation) for school. The question I want the paper to answer/discuss is: 'Can the universe be predicted at sub-atomic level?'
The ...
- 1
2
votes
1
answer
173
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Layman's questions about Supersymmetry
Please help me with two very silly questions.
Assuming supersymmetry is correct, why don't we observe the superpartners of the Standard Model particles at ordinary energies? Why do we have to search ...
- 12.3k
3
votes
1
answer
434
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Is anything expected to be found at CERN with 14 trillion electron volts that wasn't found at 13?
Based on this article
the accelerator has smashed together approximately 16 million billion
protons since 2015, when it reached its current energy of 13 trillion
electron volts. Planned ...
- 5,718
2
votes
1
answer
118
views
If the LHC test energy levels present just after the Big Bang, is it possible to test higher energies? [closed]
And, if so, would that be relevant to anything in this universe?
- 1,562
4
votes
2
answers
1k
views
Is it possible that there are more than 6 quark flavors/more than 3 generations? [duplicate]
I thought that things like the top quark don't exist in nature because they're super unstable and we can only observe them after high-energy collisions (e.g. LHC)
Is it possible to make even more ...
user77102
23
votes
2
answers
3k
views
Why can't the LHC detect heavy particles?
I am reading The Elegant Universe by Brian Greene.
In many places it's directly/indirectly mentioned that the LHC may not be able to detect (with the current technology) heavy particles to prove ...
3
votes
1
answer
115
views
Current experimental evidence of lepton flavour violation other than neutrino oscillation
Is Lepton Flavour Violation (LFV) experimentally established in processes other than neutrino oscillation? This answer by Luboš Motl points out that
Interestingly, CMS has detected a 2.5 sigma ...
- 27.2k
2
votes
1
answer
124
views
What kind of data do simulation packages like PYTHIA or ISAJET programs produce?
I read in a CMS TDR (Compact Muon Solenoid Techincal Design Report) that "PYTHIA or ISAJET programs were run to produce minimum bias, QCD jet, top, Standard Model higgs, MSSM higgs or SUSY sparticle ...
- 345
21
votes
1
answer
3k
views
What news about the second Higgs mode (or the mysterious particle) is anticipated to be seen at LHC around 750 GeV?
A few months ago, there were press releases about a possible second Higgs mode unveiled by LHC experiments. Or perhaps a new particle even more surprising like a graviton ... There was no certainty ...
- 10.8k
1
vote
0
answers
68
views
Is there an upper-limit for sparticle masses?
I realize there are many flavors to supersymmetry theory but can the LHC reach the energy and luminosity levels past which if sparticles are not detected then supersymmetry can definitively be ruled ...
user86411
4
votes
1
answer
179
views
What's the recent released 750GeV particle's spin?
I was told that it has recently been confirmed to be spin-2 particle, and potentially to be graviton. I'm pretty interested in how this has been examined.
Edit:
During the Moriond 2016 conference, ...
- 1,107
2
votes
1
answer
355
views
Signs of supersymmetry and thus dark matter at CERN
The Large Hadron Collider at CERN has just re-started after a two year pause and is now running at unprecedented levels of 6.5 TeV, with collisions that will release up to 13.5 TeV. With this increase ...
- 277
3
votes
1
answer
447
views
With the LHC about to restart as max energy, are there absolutely no hints or tantalizing signs of Supersymmetry in previous data?
Over the last couple of years I've seen several articles talk about hints or bumps in the data that might point to Supersymmetry. An article in NewScientist from Summer 2012 discussed the discovery of ...
- 729
5
votes
1
answer
256
views
Statistical significance in Z boson excess paper
In a recent ATLAS paper, a excess of $3\sigma$ was reported from the Standard Model prediction in a search looking for a same-sign dilepton signal with an invariant mass around the Z peak. For brevity ...
- 9,005
1
vote
1
answer
202
views
How experimentalists put bounds on new physics at the LHC?
I would like to understand how experimentalists search for new physics at the LHC. Lets imagine I want to use the LHC data to put a bound on the coupling of some new physics effective operator, say, ...
- 1,043
1
vote
2
answers
234
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For what rare events was the LHC built?
I understand that for low cross-section events a very high luminosity is necessary in order to obtain enough data to produce meaningful statistics. That is why the LHC was built.
But which are these ...
- 177
4
votes
1
answer
992
views
How can Kaluza-Klein particles be told apart from winding modes at the LHC?
I`ve already asked this in the comments below this article http://profmattstrassler.com/articles-and-posts/some-speculative-theoretical-ideas-for-the-lhc/extra-dimensions/how-to-look-for-signs-of-...
- 9,691
3
votes
1
answer
635
views
With estimates of mass constraints on magnetic monopoles, how likely is one to be found by the LHC (MoEDAL)?
Fermilab seems to have ruled out monopoles with mass less than 850 GeV, but I have seen some estimates of the mass thought to be in the order of up to $10^{18}$ GeV, which, of course, would make them ...
- 4,383