Speaker
Yoshitaka Ito
(Nagoya University (JP))
Description
Observations of UHECRs' by extensive air showers rely
on understanding of hadron interactions at very high energies.
Recent LHC experiments have provided useful hadron interaction data
at the collision energy which is almost equivalent to 10**17 eV
in the laboratory frame.
Among them, the LHCf experiment is dedicated measurement of neutral particle productions at very forward region of LHC IP1.
Two detectors consisting of a pair of compact electromagnetic sampling
calorimeters installed at 140 m apart from the IP1, covering the pseudorapidity range eta from 8.6 to infinity.
So far measurements of energy spectra for gamma rays,
neutral pions, and neutrons have been measured for 7TeV or 0.9 TeV
p-p collisions. LHCf has also reported neutral pions
from p-Pb collisions at root sNN = 5.02 TeV.
Obtained results are compared with the existing cosmic ray interaction models, SYBILL, QGSJETII, DPMJET3, and EPOS. The measured data
are well bracketed by these models, although none of them could completely reproduce the data.
In 2015 LHCf revisits LHC to obtain p-p collision data at 13 TeV.
Current achievement of LHCf experiment and the first look of 13 TeV
data as well as future prospects for possible very forward measurement
for p-p or p-light ions at RHIC or future LHC will be presented.
| Registration number following "ICRC2015-I/" | 226 |
|---|---|
| Collaboration | -- not specified -- |
Primary author
Yoshitaka Ito
(Nagoya University (JP))
Co-authors
Alessia Tricomi
(Universita e INFN, Catania (IT))
Gaku Mitsuka
(Universita e INFN, Firenze (IT))
Hiroaki Menjo
(Nagoya University (JP))
Oscar Adriani
(Dipartimento di Fisica)
Takashi Sako
(Nagoya University (JP))
