LIMITS ON CHARGED PARTICLES IN HADRONIC REACTIONS

MASS LIMITS for Long-Lived Charged Heavy Fermions

INSPIRE   JSON  (beta) PDGID:
S015DY
Limits are for spin 1/2 particles with no color and SU(2)$_{L}$ charge. The electric charge $\mathit Q$ of the particle (in the unit of ${{\mathit e}}$) is therefore equal to its weak hypercharge. Pair production by Drell-Yan like ${{\mathit \gamma}}$ and ${{\mathit Z}}$ exchange is assumed to derive the limits.
VALUE (GeV) CL% DOCUMENT ID TECN  COMMENT
• • We do not use the following data for averages, fits, limits, etc. • •
1
BARAK
2024
SENS millicharged particles
2
HAYRAPETYAN
2024AD
 CMS emerging dark jet
3
AAD
2023BT
 ATLS multi-charged LLP
4
SIRUNYAN
2020N
 CMS disappearing track LLP
$>660$ 95 5
AAD
2015BJ
 ATLS $\vert \mathit Q\vert $ = 2
$> 200$ 95 6
CHATRCHYAN
2013AB
 CMS $\vert \mathit Q\vert $ = 1/3
$> 480$ 95 6
CHATRCHYAN
2013AB
 CMS $\vert \mathit Q\vert $ = 2/3
$> 574$ 95 6
CHATRCHYAN
2013AB
 CMS $\vert \mathit Q\vert $ = 1
$> 685$ 95 6
CHATRCHYAN
2013AB
 CMS $\vert \mathit Q\vert $ = 2
$> 140$ 95 7
CHATRCHYAN
2013AR
 CMS $\vert \mathit Q\vert $ = 1/3
$> 310$ 95 7
CHATRCHYAN
2013AR
 CMS $\vert \mathit Q\vert $ = 2/3
1  BARAK 2024 search for milli-charged particle production in ${{\mathit p}}$-graphite collisions using skipper CCDs. No signal was observed. Limits at 95$\%$ placed in charge vs. mass plane in a wide range of masses in the MeV range.
2  HAYRAPETYAN 2024AD search for emerging dark jets from dark mediator pair production in 138 fb${}^{-1}$ of data at 13 TeV. No signal observed. Limits placed in the dark ${{\mathit \tau}}({{\mathit \pi}_{{{d}}}}$) vs m(mediator) plane.
3  AAD 2023BT search for multi-charged long-lived particles with ATLAS detector using 139 fb${}^{-1}$. No signal observed. Limits placed on LLP mass vs. charge plane.
4  SIRUNYAN 2020N search for LLPs using disappearing track signature at CMS at 13 TeV with 101 fb${}^{-1}$; no signal; limits placed on long-lived winos and higgsinos from SUSY depending on mass and lifetime: e.g. at 95$\%$ CL, for a purely higgsino neurtalino, m(chargino) $>$ 750 (175) GeV for ${{\mathit \tau}}$ = 3 (0.05) ns, and for a purely wino neutralino, m(chargino) $>$ 884 (474) GeV for ${{\mathit \tau}}$ = 3 (0.2) ns.
5  AAD 2015BJ use 20.3 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 8 TeV. See paper for limits for $\vert \mathit Q\vert $ = 3, 4, 5, 6.
6  CHATRCHYAN 2013AB use 5.0 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7 TeV and 18.8 fb${}^{-1}$ at $\mathit E_{{\mathrm {cm}}}$ = 8 TeV. See paper for limits for $\vert \mathit Q\vert $ = 3, 4,$\ldots$, 8.
7  CHATRCHYAN 2013AR use 5.0 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7 TeV.
References