LIMITS ON NEUTRAL PARTICLE PRODUCTION

Production Cross Section of Radiatively-Decaying Neutral Particle

INSPIRE   PDGID:
S030GAM
VALUE (pb) CL% DOCUMENT ID TECN  COMMENT
• • We do not use the following data for averages, fits, limits, etc. • •
$<0.0008$ 95 1
AAD
2016AI
 ATLS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \gamma}}$ + jet
2
KHACHATRYAN
2016M
 CMS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}$ resonance
$\text{<(0.043 - 0.17)}$ 95 3
ABBIENDI
2000D
 OPAL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit X}^{0}}{{\mathit Y}^{0}}$ , ${{\mathit X}^{0}}$ $\rightarrow$ ${{\mathit Y}^{0}}{{\mathit \gamma}}$
$\text{<(0.05 - 0.8)}$ 95 4
ABBIENDI
2000D
 OPAL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit X}^{0}}{{\mathit X}^{0}}$ , ${{\mathit X}^{0}}$ $\rightarrow$ ${{\mathit Y}^{0}}{{\mathit \gamma}}$
$\text{<(2.5 - 0.5)}$ 95 5
ACKERSTAFF
1997B
 OPAL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit X}^{0}}{{\mathit Y}^{0}}$ , ${{\mathit X}^{0}}$ $\rightarrow$ ${{\mathit Y}^{0}}{{\mathit \gamma}}$
$\text{<(1.6 - 0.9)}$ 95 6
ACKERSTAFF
1997B
 OPAL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit X}^{0}}{{\mathit X}^{0}}$ , ${{\mathit X}^{0}}$ $\rightarrow$ ${{\mathit Y}^{0}}{{\mathit \gamma}}$
1  AAD 2016AI search for excited quarks (EQ) and quantum black holes (QBH) in 3.2 fb${}^{-1}$ at 13 TeV of data; exclude EQ below 4.4 TeV and QBH below 3.8 (6.2) TeV for RS1 (ADD) models. The visible cross section limit was obtained for 5 TeV resonance with ${{\mathit \sigma}_{{G}}}/{{\mathit M}_{{G}}}$ = 2$\%$.
2  KHACHATRYAN 2016M search for ${{\mathit \gamma}}{{\mathit \gamma}}$ resonance using 19.7 fb${}^{-1}$ at 8 TeV and 3.3 fb${}^{-1}$ at 13 Tev; slight excess at 750 GeV noted; limit set on RS graviton.
3  ABBIENDI 2000D associated production limit is for ${\mathit m}_{{{\mathit X}^{0}}}$= $90 - 188$ GeV, ${\mathit m}_{{{\mathit Y}^{0}}}$=0 at $\mathit E_{{\mathrm {cm}}}$=189 GeV. See also their Fig.$~$9.
4  ABBIENDI 2000D pair production limit is for ${\mathit m}_{{{\mathit X}^{0}}}$ = $45 - 94$ GeV, ${\mathit m}_{{{\mathit Y}^{0}}}$=0 at $\mathit E_{{\mathrm {cm}}}$=189 GeV. See also their Fig.$~$12.
5  ACKERSTAFF 1997B associated production limit is for ${\mathit m}_{{{\mathit X}^{0}}}$ = $80 - 160$ GeV, ${\mathit m}_{{{\mathit Y}^{0}}}$=0 from $10.0~$pb${}^{-1}$ at $\mathit E_{{\mathrm {cm}}}$ = 161 GeV. See their Fig.$~$3(a).
6  ACKERSTAFF 1997B pair production limit is for ${\mathit m}_{{{\mathit X}^{0}}}$ = $40 - 80$ GeV, ${\mathit m}_{{{\mathit Y}^{0}}}$=0 from $10.0~$pb${}^{-1}$ at $\mathit E_{{\mathrm {cm}}}$ = 161 GeV. See their Fig.$~$3(b).
References:
AAD 2016AI
JHEP 1603 041 Search for New Phenomena with Photon $+$ Jet Events in Proton-Proton Collisions at $\sqrt {s }$ = 13 TeV with the ATLAS Detector
KHACHATRYAN 2016M
PRL 117 051802 Search for Resonant Production of High-Mass Photon Pairs in Proton-Proton Collisions at $\sqrt {s }$ = 8 and 13 TeV
ABBIENDI 2000D
EPJ C13 197 A Study of Three Prong ${{\mathit \tau}}$ Decays with Charged Kaons
ACKERSTAFF 1997B
PL B391 210 Photonic Events with Large Missing Energy in ${{\mathit e}^{+}}{{\mathit e}^{-}}$ Collisions at $\sqrt {s }$ = 161 GeV