Testing ATLAS Z+MET Excess with LHC Run 2

Lu, Xiaochuan; Shirai, Satoshi; Terada, Takahiro

doi:10.1007/JHEP05(2016)108

Testing ATLAS Z+MET Excess with LHC Run 2

Xiaochuan Lu
(
- UC, Davis
)
,
Satoshi Shirai
(
- DESY
)
,
Takahiro Terada
(
- APCTP, Pohang and
- Tokyo U.
)

Jan 21, 2016

19 pages

Published in:

JHEP 05 (2016) 108

Published: May 18, 2016

e-Print:

1601.05777 [hep-ph]

DOI:

10.1007/JHEP05(2016)108

Report number:

DESY-16-005,
APCTP-PRE2016-003,
UT-16-02

View in:

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Abstract: (Springer)

The ATLAS collaboration reported a 3σ excess in the search of events containing on-Z dilepton, jets, and large missing momentum (MET) in the 8 TeV LHC run. Motivated by this excess, many models of new physics have been proposed. Recently, the ATLAS and CMS collaborations reported new results for similar Z+MET channels in the 13 TeV run. In this paper, we comprehensively discuss the consistency between the proposed models and the LHC results of Run 1 and Run 2. We find that in models with heavy gluino production, there is generically some tension between the 8 TeV and 13 TeV results. On the other hand, models with light squark production provide relatively better fitting to both results.

Note:

18 pages, 2 tables, 8 figures. Version accepted for publication in JHEP

Supersymmetry Phenomenology
supersymmetry
squark: production
gluino: production
gluino: heavy
p p --> Z0 missing-energy
numerical calculations: Monte Carlo
interpretation of experiments
CMS
ATLAS

References(66)

Figures(18)

[1]

Search for supersymmetry in events containing a same-flavour opposite-sign dilepton pair, jets, and large missing transverse momentum in $\sqrt{s}=8$ TeV pp collisions with the ATLAS detector

ATLAS

Collaboration

•

Georges Aad
(
- Marseille, CPPM
)

et al.

- Eur.Phys.J.C 75 (2015) 7, 318,
- Eur.Phys.J.C 75 (2015) 10, 463 (erratum)
•
e-Print:
- 1503.03290
•
DOI:
- 10.1140/epjc/s10052-015-3518-2

[2]

METing SUSY on the Z peak

G. Barenboim
(
- Valencia U. and
- Valencia U., IFIC
)
,
J. Bernabeu
(
- Valencia U. and
- Valencia U., IFIC
)
,
V.A. Mitsou
(
- Valencia U., IFIC
)
,
E. Romero
(
- Valencia U., IFIC
)
,
O. Vives
(
- Valencia U. and
- Valencia U., IFIC
)

- Eur.Phys.J.C 76 (2016) 57
•
e-Print:
- 1503.04184
•
DOI:
- 10.1140/epjc/s10052-016-3901-7

[2]

Conciliating SUSY with the Z-peaked excess

Vasiliki A. Mitsou
(
- Valencia U., IFIC
)

- EPJ Web Conf. 126 (2016) 02021
•
e-Print:
- 1512.06166
•
DOI:
- 10.1051/epjconf/201612602021

[3]

Consistency of the recent ATLAS $Z+E_T^{\rm miss}$ excess in a simplified GGM model

Ben Allanach
(
- Cambridge U., DAMTP
)
,
Are Raklev
(
- Oslo U.
)
,
Anders Kvellestad
(
- Oslo U.
)

- Phys.Rev.D 91 (2015) 095016
•
e-Print:
- 1504.02752
•
DOI:
- 10.1103/PhysRevD.91.095016

[4]

Possible explanation of excess events in the search for jets, missing transverse momentum and a Z boson in pp collisions

Ulrich Ellwanger
(
- Orsay, LPT and
- Southampton U.
)

- Eur.Phys.J.C 75 (2015) 8, 367
•
e-Print:
- 1504.02244
•
DOI:
- 10.1140/epjc/s10052-015-3591-6

[5]

Explanation of the ATLAS Z-Peaked Excess in the NMSSM

Junjie Cao
(
- Henan Normal U. and
- Xian Jiaotong U.
)
,
Liangliang Shang
(
- Henan Normal U.
)
,
Jin Min Yang
(
- Beijing, Inst. Theor. Phys.
)
,
Yang Zhang
(
- Beijing, Inst. Theor. Phys.
)

- JHEP 06 (2015) 152
•
e-Print:
- 1504.07869
•
DOI:
- 10.1007/JHEP06(2015)152

[6]

ATLAS on-Z Excess via gluino-Higgsino-singlino decay chains in the NMSSM

Keisuke Harigaya
(
- UC, Berkeley and
- LBNL, Berkeley and
- Tokyo U., ICRR
)
,
Masahiro Ibe
(
- Tokyo U., ICRR and
- Tokyo U., IPMU
)
,
Teppei Kitahara
(
- KIT, Karlsruhe, TTP and
- KIT, Karlsruhe, IKP and
- KEK, Tsukuba
)

- JHEP 01 (2016) 030
•
e-Print:
- 1510.07691
•
DOI:
- 10.1007/JHEP01(2016)030

[7]

ATLAS $Z$ Excess in Minimal Supersymmetric Standard Model

Xiaochuan Lu
(
- LBL, Berkeley and
- UC, Berkeley
)
,
Satoshi Shirai
(
- DESY
)
,
Takahiro Terada
(
- DESY and
- Tokyo U.
)

- JHEP 09 (2015) 204
•
e-Print:
- 1506.07161
•
DOI:
- 10.1007/JHEP09(2015)204

[8]

Z-peaked excess in goldstini scenarios

Seng Pei Liew
(
- Tokyo U.
)
,
Alberto Mariotti
(
)
,
Kentarou Mawatari
(
)
,
Kazuki Sakurai
(
- King's Coll. London
)
,
Matthias Vereecken
(
)

- Phys.Lett.B 750 (2015) 539-546
•
e-Print:
- 1506.08803
•
DOI:
- 10.1016/j.physletb.2015.09.035

[9]

ATLAS Z-peaked excess in the MSSM with a light sbottom or stop

Archil Kobakhidze
(
- Sydney U.
)
,
Ning Liu
(
- Henan Normal U.
)
,
Lei Wu
(
- Sydney U.
)
,
Jin Min Yang
(
- Beijing, Inst. Theor. Phys. and
- Beijing, KITPC
)

- Phys.Rev.D 92 (2015) 7, 075008
•
e-Print:
- 1504.04390
•
DOI:
- 10.1103/PhysRevD.92.075008

[10]

Explanation of the ATLAS Z-peaked excess by squark pair production in the NMSSM

Junjie Cao
(
- Henan Normal U. and
- Xian Jiaotong U.
)
,
Liangliang Shang
(
- Henan Normal U.
)
,
Jin Min Yang
(
- Beijing, Inst. Theor. Phys.
)
,
Yang Zhang
(
- Beijing, Inst. Theor. Phys.
)

- JHEP 10 (2015) 178
•
e-Print:
- 1507.08471
•
DOI:
- 10.1007/JHEP10(2015)178

[11]

ATLAS Z + missing transverse energy excess in the MSSM

M. Cahill-Rowley
(
- SLAC
)
,
J.L. Hewett
(
- SLAC
)
,
A. Ismail
(
- Argonne and
- U. Illinois, Chicago
)
,
T.G. Rizzo
(
- SLAC
)

- Phys.Rev.D 92 (2015) 075029
•
e-Print:
- 1506.05799
•
DOI:
- 10.1103/PhysRevD.92.075029

[12]

Mixed Stops and the ATLAS on-Z Excess

Jack H. Collins
(
- Cornell U., Phys. Dept. and
- Cornell U., LEPP
)
,
Jeff Asaf Dror
(
- Cornell U., Phys. Dept. and
- Cornell U., LEPP
)
,
Marco Farina
(
)

- Phys.Rev.D 92 (2015) 9, 095022
•
e-Print:
- 1508.02419
•
DOI:
- 10.1103/PhysRevD.92.095022

[13]

$Z$ -peaked excess from heavy gluon decays to vectorlike quarks

Natascia Vignaroli
(
- Michigan State U.
)

- Phys.Rev.D 91 (2015) 11, 115009
•
e-Print:
- 1504.01768
•
DOI:
- 10.1103/PhysRevD.91.115009

[14]

Search for Physics Beyond the Standard Model in Events with Two Leptons, Jets, and Missing Transverse Momentum in pp Collisions at sqrt(s) = 8 TeV

CMS

Collaboration

•

Vardan Khachatryan
(
- Yerevan Phys. Inst.
)

et al.

- JHEP 04 (2015) 124
•
e-Print:
- 1502.06031
•
DOI:
- 10.1007/JHEP04(2015)124

[15]

A search for Supersymmetry in events containing a leptonically decaying $Z$ boson, jets and missing transverse momentum in $\sqrt{s}=13~$ TeV $pp$ collisions with the ATLAS detector

[16]

Search for new physics in final states with two opposite-sign same-flavor leptons, jets and missing transverse momentum in pp collisions at sqrt(s)=13 TeV

CMS

Collaboration

[17]

Search for supersymmetry in events containing light leptons, jets and missing transverse momentum in √ s = 8TeV pp collisions with the ATLAS detector, Ph.D. thesis, Wurzburg U presented 25 Sep