Improved Limits on Millicharged Particles Using the ArgoNeuT Experiment at Fermilab

被引：66

作者：

Acciarri, R. ^{[1
]}

Adams, C. ^{[2
]}

Asaadi, J. ^{[3
]}

Baller, B. ^{[1
]}

Bolton, T. ^{[4
]}

Bromberg, C. ^{[5
]}

Cavanna, F. ^{[1
]}

Edmunds, D. ^{[5
]}

Fitzpatrick, R. S. ^{[6
]}

Fleming, B. ^{[7
]}

Harnik, R. ^{[1
]}

James, C. ^{[1
]}

Lepetic, I ^{[8
]}

Littlejohn, B. R. ^{[8
]}

Liu, Z. ^{[9
]}

Luo, X. ^{[10
]}

Palamara, O. ^{[1
]}

Scanavini, G. ^{[7
]}

Soderberg, M. ^{[11
]}

Spitz, J. ^{[6
]}

Szelc, A. M. ^{[12
]}

Wu, W. ^{[1
]}

Yang, T. ^{[1
]}

机构：

[1] Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA

[2] Argonne Natl Lab, Lemont, IL 60439 USA

[3] Univ Texas Arlington, Arlington, TX 76019 USA

[4] Kansas State Univ, Manhattan, KS 66506 USA

[5] Michigan State Univ, E Lansing, MI 48824 USA

[6] Univ Michigan, Ann Arbor, MI 48109 USA

[7] Yale Univ, New Haven, CT 06520 USA

[8] IIT, Chicago, IL 60616 USA

[9] Univ Maryland, Maryland Ctr Fundamental Phys, Dept Phys, College Pk, MD 20742 USA

[10] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA

[11] Syracuse Univ, Syracuse, NY 13244 USA

[12] Univ Manchester, Manchester M13 9PL, Lancs, England

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 124卷 / 13期

基金：

英国科学技术设施理事会; 美国国家科学基金会;

关键词：

Elementary particles;

D O I：

10.1103/PhysRevLett.124.131801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A search for millicharged particles, a simple extension of the standard model, has been performed with the ArgoNeuT detector exposed to the Neutrinos at the Main Injector beam at Fermilab. The ArgoNeuT liquid argon time projection chamber detector enables a search for millicharged particles through the detection of visible electron recoils. We search for an event signature with two soft hits (MeV-scale energy depositions) aligned with the upstream target. For an exposure of the detector of 1.0 x 10(20) protons on target, one candidate event has been observed, compatible with the expected background. This search is sensitive to millicharged particles with charges between 10(-3)e and 10(-1)e and with masses in the range from 0.1 to 3 GeV. This measurement provides leading constraints on millicharged particles in this large unexplored parameter space region.

引用

页数：6

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