Neutrino Dectetion at LHC

[beecee]

https://phys.org/news/2021-11-physicists-neutrinos-large-hadron-collider.html

Physicists detect signs of neutrinos at Large Hadron Collider:

The FASER particle detector that received CERN approval to be installed at the Large Hadron Collider in 2019 has recently been augmented with an instrument to detect neutrinos. The UCI-led FASER team used a smaller detector of the same type in 2018 to make the first observations of the elusive particles generated at a collider. The new instrument will be able to detect thousands of neutrino interactions over the next three years, the researchers say. Credit: CERN

 

The international Forward Search Experiment team, led by physicists at the University of California, Irvine, has achieved the first-ever detection of neutrino candidates produced by the Large Hadron Collider at the CERN facility near Geneva, Switzerland.

In a paper published today in the journal Physical Review D, the researchers describe how they observed six neutrino interactions during a pilot run of a compact emulsion detector installed at the LHC in 2018.

"Prior to this project, no sign of neutrinos has ever been seen at a particle collider," said co-author Jonathan Feng, UCI Distinguished Professor of physics & astronomy and co-leader of the FASER Collaboration. "This significant breakthrough is a step toward developing a deeper understanding of these elusive particles and the role they play in the universe."

 

more at link..............

 

the paper:

https://journals.aps.org/prd/abstract/10.1103/PhysRevD.104.L091101

First neutrino interaction candidates at the LHC

ABSTRACT

FASERν at the CERN Large Hadron Collider (LHC) is designed to directly detect collider neutrinos for the first time and study their cross sections at TeV energies, where no such measurements currently exist. In 2018, a pilot detector employing emulsion films was installed in the far-forward region of ATLAS, 480 m from the interaction point, and collected 12.2  fb−1 of proton-proton collision data at a center-of-mass energy of 13 TeV. We describe the analysis of this pilot run data and the observation of the first neutrino interaction candidates at the LHC. This milestone paves the way for high-energy neutrino measurements at current and future colliders.

[Sensei]

41 minutes ago, beecee said:

"Prior to this project, no sign of neutrinos has ever been seen at a particle collider," said co-author Jonathan Feng, UCI Distinguished Professor of physics & astronomy and co-leader of the FASER Collaboration.

This is not entirely correct. The neutrino recoil force is observed, which is indirect evidence of decay with the emission of a neutral electric particle or interaction with a neutrino.

https://www.google.com/search?q=recoil+force+from+neutrinos

 

[swansont]

3 hours ago, beecee said:

"Prior to this project, no sign of neutrinos has ever been seen at a particle collider," said co-author Jonathan Feng, UCI Distinguished Professor of physics & astronomy and co-leader of the FASER Collaboration. 

Not strictly true. We did neutrino spectrometry measurements via momentum reconstruction when I was a postdoc at TRIUMF (in the TRINAT group) back in the 90s and they've continued the work. The neutrinos weren't generated directly in the cyclotron collisions, but we were most definitely at the site.

[beecee]

9 hours ago, Sensei said:

This is not entirely correct. The neutrino recoil force is observed, which is indirect evidence of decay with the emission of a neutral electric particle or interaction with a neutrino.

https://www.google.com/search?q=recoil+force+from+neutrinos

 

 

6 hours ago, swansont said:

Not strictly true. We did neutrino spectrometry measurements via momentum reconstruction when I was a postdoc at TRIUMF (in the TRINAT group) back in the 90s and they've continued the work. The neutrinos weren't generated directly in the cyclotron collisions, but we were most definitely at the site.

Thanks for the correction fellas.

[swansont]

3 hours ago, beecee said:

Thanks for the correction fellas.

We know it wasn’t your error. 

[beecee]

17 minutes ago, swansont said:

We know it wasn’t your error. 

Thanks...I do understand that sometimes, these journalists, can go somewhat astray with the language they use and plain old simple errors. Great to see two at least, not missing that error.