Supersymmetric interpretation of the muon g – 2 anomaly - INSPIRE

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Supersymmetric interpretation of the muon g – 2 anomaly

Motoi Endo
(
- Tsukuba, Graduate U. Adv. Studies and
- Tokyo U., IPMU
)
,
Koichi Hamaguchi
(
- Tokyo U., IPMU and
- Tokyo U.
)
,
Sho Iwamoto
(
- Eotvos U., Dept. Atomic Phys.
)
,
Teppei Kitahara
(
- Nagoya U., IAR and
- KMI, Nagoya
)

Apr 7, 2021

27 pages

Published in:

JHEP 07 (2021) 075

Published: Jul 13, 2021

e-Print:

2104.03217 [hep-ph]

DOI:

10.1007/JHEP07(2021)075

Report number:

IPMU21-0027,
KEK-TH-2319

View in:

ADS Abstract Service

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Abstract: (Springer)

The Fermilab Muon g− 2 collaboration recently announced the first result of measurement of the muon anomalous magnetic moment (g− 2), which confirmed the previous result at the Brookhaven National Laboratory and thus the discrepancy with its Standard Model prediction. We revisit low-scale supersymmetric models that are naturally capable to solve the muon g− 2 anomaly, focusing on two distinct scenarios: chargino-contribution dominated and pure-bino-contribution dominated scenarios. It is shown that the slepton pair-production searches have excluded broad parameter spaces for both two scenarios, but they are not closed yet. For the chargino-dominated scenario, the models with

{m}_{{\tilde{\mu}}_{\mathrm{L}}}\gtrsim {m}_{{\tilde{\chi}}_1^{\pm }}

are still widely allowed. For the bino-dominated scenario, we find that, although slightly non-trivial, the region with low tan β with heavy higgsinos is preferred. In the case of universal slepton masses, the low mass regions with

{m}_{\tilde{\mu}}

≲ 230 GeV can explain the g− 2 anomaly while satisfying the LHC constraints. Furthermore, we checked that the stau-bino coannihilation works properly to realize the bino thermal relic dark matter. We also investigate heavy staus case for the bino-dominated scenario, where the parameter region that can explain the muon g− 2 anomaly is stretched to

{m}_{\tilde{\mu}}

≲ 1.3 TeV.

Note:

26 pages, 4 figures, 2 tables; v2: references added; v3: version published in JHEP

Supersymmetry Phenomenology
muon: magnetic moment
slepton: mass
slepton: pair production
dark matter: mass: low
anomaly
interpretation of experiments: CERN LHC Coll
supersymmetry
thermal
bino

References(110)

Figures(12)

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