SciPost Submission Page
Muon g−2/EDM measurement at J-PARC
by M. Abe, S. Bae, G. Beer, G. Bunce, H. Choi, S. Choi, M. Chung, W. da Silva, S. Eidelman, M. Finger, Y. Fukao, T. Fukuyama, S. Haciomeroglu, K. Hasegawa, K. Hayasaka, N. Hayashizaki, H. Hisamatsu, T. Iijima, H. Iinuma, K. Inami, H. Ikeda, M. Ikeno, K. Ishida, T. Itahashi, M. Iwasaki, Y. Iwashita, Y. Iwata, R. Kadono, S. Kamal, T. Kamitani, S. Kanda, F. Kapusta, K. Kawagoe, N. Kawamura, R. Kitamura, B. Kim, Y. Kim, T. Kishishita, H. Ko, T. Kohriki, S. Kamioka, Y. Kondo, T. Kume, M. J. Lee, S. Lee, W. Lee, G. M. Marshall, Y. Matsuda, T. Mibe, Y. Miyake, T. Murakami, K. Nagamine, H. Nakayama, S. Nishimura, D. Nomura, T. Ogitsu, S. Ohsawa, K. Oide, Y. Oishi, S. Okada, A. Olin, Z. Omarov, M. Otani, G. Razuvaev, A. Rehman, N. Saito, N. F. Saito, K. Sasaki, O. Sasaki, N. Sato, Y. Sato, Y. K. Semertzidis, H. Sendai, Y. Shatunov, K. Shimomura, M. Shoji, B. Shwartz, P. Strasser, Y. Sue, T. Suehara, C. Sung, K. Suzuki, T. Takatomi, M. Tanaka, J. Tojo, Y. Tsutsumi, T. Uchida, K. Ueno, S. Wada, E. Won, H. Yamaguchi, T. Yam
Submission summary
| Authors (as registered SciPost users): | Georgiy Razuvaev |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202201_00003v1 (pdf) |
| Date submitted: | 2022-01-10 09:58 |
| Submitted by: | Razuvaev, Georgiy |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 16th International Workshop on Tau Lepton Physics (TAU2021) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
|
| Approach: | Experimental |
Abstract
The muon g-2/EDM experiment at J-PARC is under preparation and targeted to measure the muon anomalous magnetic moment with the precision of 450 ppb and muon electric dipole moment with 1.5e-21 e cm at its first stage, thus contributing to investigation of discrepancy between the Standard Model prediction and the current world average of muon g-2. The latter is dominated by two similar experiments E821 BNL and E989 FNAL, while we suggest a novel approach: pulsed primary proton beam provides surface muons, which are diffused through a silica aerogel target forming thermalised muonium atoms. They are laser ionised and re-accelerated by a multi-stage linac up to 300 MeV /c before spiral injection into the storage uniform 3 T MRI-like magnet volume at the stable orbit in the absence of E-field. The silicon strip detector placed inside the magnet measures decayed positron parameters used in data analysis. We report the experimental approach, current status, and future prospects.
Current status:
Reports on this Submission
Strengths
1) a nice update of the status of an important experiment
Weaknesses
1) a bit unbalanced in details, but perhaps focusing more on what is now well understood vs things still in design optimization stage
2) with statements about improved systematics compared to BNL and FNAL approach, it would be natural to have a table of the systematics investigated so far and some reason to understand why one can achieve the goal
3) similarly the statistics limitation was not presented in terms of simple things like stored muons, fill rates, acceptance, asymmetry, etc. even though I am sure they have done that.
Report
This paper reads like a conference proceeding might; it is an update on a project that is better documented in topic-specific technical papers or a design report but it a nice and easy read and gave me a good feeling of where this project is and when they hope to take data so I believe it should be published.
Requested changes
Honestly, there are so many grammar issues I marked up far too many just on page 1 to even list. So, it needs a native English speaker or expert to go through and fix the obvious ones (it will be quite easy to do so)
Line 98 refers to a 'pic' but I didn't find it.
I'd like to see the tables of systematics and statistics if there is room
If there is time, another pass through to balance the sections would be valuable and to think about the level of details presented