CMS public results for Higgs boson

In summary, the conversation discusses the results of a CMS study on new charged Higgs particles. The main result is an expected 95% confidence level model-independent upper limit on the product of branching fractions for the process of top quark decay to a bottom quark and a charged Higgs particle, multiplied by the branching fraction for the charged Higgs particle to decay into a tau lepton and a neutrino. The limit ranges from 1.1-0.22% for charged Higgs masses in the range of 80-160 GeV, to 0.41-0.030 picobarns (pb) for charged Higgs masses in the range of 180-600 GeV. The conversation also mentions exclusion
  • #1
Safinaz
259
8
Hi all,

I read one of the CMS results for new charged Higgs on :
https://twiki.cern.ch/twiki/bin/view/CMSPublic/Hig14020TWiki

I can't understand this sentence at the main results:
An expected 95 % CL model-independent upper limit on B(t->bH+) x B(H+ -> tau nu) in the range of 1.1-0.22 % is obtained for m_H+ = 80-160 https://twiki.cern.ch/twiki/bin/view/CMSPublic/GeV while for m_H+ = 180-600 https://twiki.cern.ch/twiki/bin/view/CMSPublic/GeV a model-independent limit on sigma(pp -> H+- tb) is set to 0.41-0.030 pb. The corresponding observed 95 % CL model-independent upper limit is set to 1.2-0.16 % for m_H+ = 80-160 https://twiki.cern.ch/twiki/bin/view/CMSPublic/GeV and to 0.38-0.026 pb for m_H+ = 180-600 https://twiki.cern.ch/twiki/bin/view/CMSPublic/GeV . The results are interpreted in different MSSM benchmark scenarios and are used to set exclusion limits in the m_H+ - tan(beta) and m_A - tan(beta) parameter spaces.

What does it mean? is that constrains the theoretical calculations of sigma(pp -> H+- tb) to be 0.41-0.030 pb,
what about the last sentence which mentions "0.38-0.026 pb" ?

Bests,
S.
 
Last edited by a moderator:
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  • #2
The ranges correspond to the mass ranges, different masses have different exclusion limits.
 
  • #3
Thanx, I got it.
 

1. What are the CMS public results for the Higgs boson?

The CMS (Compact Muon Solenoid) experiment at the Large Hadron Collider (LHC) at CERN has published several results related to the discovery and study of the Higgs boson. These include measurements of its mass, interactions with other particles, and production and decay rates.

2. How was the Higgs boson discovered by CMS?

The Higgs boson was discovered by CMS in 2012 through the observation of its decay into two high-energy photons. This observation was consistent with the predicted behavior of the Higgs boson in the Standard Model of particle physics. Other decay modes of the Higgs boson have also been observed by CMS, further confirming its existence.

3. What is the significance of the Higgs boson discovery by CMS?

The discovery of the Higgs boson by CMS is significant because it confirms the existence of the last missing piece of the Standard Model of particle physics. This model is our current understanding of the fundamental building blocks of the universe and their interactions. The Higgs boson is also important because it gives particles their mass, which is essential for the formation of matter.

4. What are the implications of the CMS measurements of the Higgs boson?

The CMS measurements of the Higgs boson have provided valuable information about its properties and interactions with other particles. This has allowed scientists to further refine and test the predictions of the Standard Model. It has also opened up new avenues for research, such as studying the Higgs boson's potential role in physics beyond the Standard Model.

5. How do the CMS public results for the Higgs boson contribute to our understanding of the universe?

The CMS public results for the Higgs boson contribute to our understanding of the universe by providing evidence for the existence of this fundamental particle and its role in the formation of matter. They also help us better understand the behavior of particles at the smallest scales and how they interact with each other. This knowledge can potentially lead to new technologies and advancements in our understanding of the universe.

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