【Research】First observation of neutrino interaction candidates at the LHC – A new perspective on neutrino experiments

【Research】First observation of neutrino interaction candidates at the LHC – A new perspective on neutrino experiments –

2021.11.29

Research

LHC

The first neutrino interaction candidates detected by nuclear emulsion detector at LHC . Two candidates at top and bottom picture with Left：side view and right：top view of the events. The tracks produced by the neutrino interactions at lead plates and recorded at the nuclear emulsion films.

ForwArd Search ExpeRiment at the LHC (FASER), an international collaboration involving KMI’s Toshiyuki Nakano, Mitsuhiro Nakamura, Hiroki Rokujo, and Osamu Sato has successfully observed neutrino reaction candidates from the LHC, the world’s highest energy collider.

This result shows that the FASER experiment is indeed useful in the study of TeV-scale neutrinos. This achievement uses the nuclear emulsion technology developed by Nagoya University’s F Lab, which highlights the high mobility in equipment installation and development.
The results of this research were published in “Physical Review D” on November 24, 2021.

For details, please see the press release.

A picture of the nuclear emulsion detector from beam upstream and the schematic side view of the detector. Metallic plates (1-mm^thick lead or 0.5mm-thick tungsten) are interleaved with 0.3 mm-thick emulsion films. A 14 kg lead module(left) and a 15 kg tungsten one(right), the volume about (20cm)3 for each.

There could be new discoveries at the new frontier. Here the observation of neutrino interaction candidates from LHC is reported and it opened the door to study neutrino interactions at un-explored energy (sub-TeV to TeV) region.
We are looking forward to seeing the outcome from the FASER experiment run in 2022-2024. The nuclear emulsion techniques developed at Nagoya University acts as a key role of neutrino detection and the analysis. – Osamu Sato

Paper Information

Journal: Physical Review D (日付)
Title: First neutrino interaction candidates at the LHC
Authors: Akitaka Ariga, Tomoko Ariga, Tomohiro Inada, Mitsuhiro Nakamura, Toshiyuki Nakano, Hidetoshi Otono, Hiroki Rokujo, Osamu Sato, Yosuke Takubo, et al. (Alphabetical order)
DOI: 10.1103/PhysRevD.104.L091101