Search for an Invisibly Decaying $Z^{\prime}$ Boson at Belle II in $e^+ e^- \to \mu^+ \mu^- (e^{\pm} \mu^{\mp})$ Plus Missing Energy Final States - INSPIRE

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Search for an Invisibly Decaying $Z^{\prime}$ Boson at Belle II in $e^+ e^- \to \mu^+ \mu^- (e^{\pm} \mu^{\mp})$ Plus Missing Energy Final States

Belle-II

Collaboration

Dec 24, 2019

9 pages

Published in:

Phys.Rev.Lett. 124 (2020) 14, 141801

Published: Apr 7, 2020

e-Print:

1912.11276 [hep-ex]

DOI:

10.1103/PhysRevLett.124.141801

PDG: Limits for other

{{\mathit Z}^{\,'}}

Report number:

Belle II Preprint 2019-002,
KEK Preprint 2019-55,

Experiments:

KEK-BF-BELLE-II

View in:

reference search83 citations

Citations per year

Abstract: (APS)

Theories beyond the standard model often predict the existence of an additional neutral boson, the Z′. Using data collected by the Belle II experiment during 2018 at the SuperKEKB collider, we perform the first searches for the invisible decay of a Z′ in the process e+e-→μ+μ-Z′ and of a lepton-flavor-violating Z′ in e+e-→e±μ∓Z′. We do not find any excess of events and set 90% credibility level upper limits on the cross sections of these processes. We translate the former, in the framework of an Lμ-Lτ theory, into upper limits on the Z′ coupling constant at the level of 5×10-2−1 for MZ′≤6 GeV/c2.

Note:

9 pages, 5 figures + supplemental materials. Accepted for publication in Physical Review Letters

12.60.-i
14.80.-j
13.66.De
95.35.+d
Elementary Particles and Fields
electron positron: annihilation
electron positron: colliding beams
Z': electroproduction
muon: pair production
lepton: flavor: violation

References(30)

Figures(11)

[1]

Dark matter progenitor: Light vector boson decay into sterile neutrinos

Brian Shuve
(
- Perimeter Inst. Theor. Phys. and
- McMaster U.
)
,
Itay Yavin
(
- Perimeter Inst. Theor. Phys. and
- McMaster U.
)

- Phys.Rev.D 89 (2014) 11, 113004
•
e-Print:
- 1403.2727
•
DOI:
- 10.1103/PhysRevD.89.113004

[2]

Explaining dark matter and B decay anomalies with an $L_\mu - L_\tau$ model

- JHEP 12 (2016) 106
•
e-Print:
- 1609.04026
•
DOI:
- 10.1007/JHEP12(2016)106

[3]

Test of lepton universality using $B^{+}\rightarrow K^{+}\ell^{+}\ell^{-}$ decays

LHCb

Collaboration

•

Roel Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Rev.Lett. 113 (2014) 151601
•
e-Print:
- 1406.6482
•
DOI:
- 10.1103/PhysRevLett.113.151601

[4]

Final Report of the Muon E821 Anomalous Magnetic Moment Measurement at BNL

Muon g-2

Collaboration

•

G.W. Bennett
(
- Brookhaven
)

et al.

- Phys.Rev.D 73 (2006) 072003
•
e-Print:
- hep-ex/0602035
•
DOI:
- 10.1103/PhysRevD.73.072003

[5]

Illuminating Dark Photons with High-Energy Colliders

David Curtin
(
- Maryland U.
)
,
Rouven Essig
(
- YITP, Stony Brook
)
,
Stefania Gori
(
- Perimeter Inst. Theor. Phys.
)
,
Jessie Shelton
(
- Illinois U., Urbana
)

- JHEP 02 (2015) 157
•
e-Print:
- 1412.0018
•
DOI:
- 10.1007/JHEP02(2015)157

[6]

Search for a muonic dark force at BABAR

BaBar

Collaboration

•

J.P. Lees
(
- Annecy, LAPP
)

et al.

- Phys.Rev.D 94 (2016) 1, 011102
•
e-Print:
- 1606.03501
•
DOI:
- 10.1103/PhysRevD.94.011102

[7]

Search for an $L_{\mu}-L_{\tau}$ gauge boson using Z $\to4\mu$ events in proton-proton collisions at $\sqrt{s} =$ 13 TeV

CMS

Collaboration

•

Albert M Sirunyan
(
- Yerevan Phys. Inst.
)

et al.

- Phys.Lett.B 792 (2019) 345-368
•
e-Print:
- 1808.03684
•
DOI:
- 10.1016/j.physletb.2019.01.072

[8]

Dark sectors and enhanced $h\to \tau \mu$ transitions

Iftah Galon
(
- UC, Irvine
)
,
Jure Zupan
(
- Cincinnati U. and
- CERN
)

- JHEP 05 (2017) 083
•
e-Print:
- 1701.08767
•
DOI:
- 10.1007/JHEP05(2017)083

[9]

Lepton-Flavor Violating Mediators

- JHEP 03 (2017) 064
•
e-Print:
- 1610.08060
•
DOI:
- 10.1007/JHEP03(2017)064

[10]

Measurement and interpretation of fermion-pair production at LEP energies above the Z resonance

DELPHI

Collaboration

•

J. Abdallah

et al.

- Eur.Phys.J.C 45 (2006) 589-632
•
e-Print:
- hep-ex/0512012
•
DOI:
- 10.1140/epjc/s2005-02461-0

[11]

Belle II Technical Design Report

Belle-II

Collaboration

•

T. Abe

et al.

e-Print:
- 1011.0352

[12]

SuperKEKB Collider

SuperKEKB

Collaboration

•

Kazunori Akai
(
- KEK, Tsukuba and
- Sokendai, Kanagawa
)

et al.

- Nucl.Instrum.Meth.A 907 (2018) 188-199
•
e-Print:
- 1809.01958
•
DOI:
- 10.1016/j.nima.2018.08.017

[13]

Measurement of the integrated luminosity of the Phase 2 data of the Belle II experiment

Belle-II

Collaboration

•

F. Abudinén
(
- INFN, Trieste
)

et al.

- Chin.Phys.C 44 (2020) 2, 021001
•
e-Print:
- 1910.05365
•
DOI:
- 10.1088/1674-1137/44/2/021001

[14]

The Belle II Physics Book

Belle-II

Collaboration

•

E. Kou
(
- Orsay, LAL
)
(ed.)

et al.

- PTEP 2019 (2019) 12, 123C01,
- PTEP 2020 (2020) 2, 029201 (erratum)
•
e-Print:
- 1808.10567
•
DOI:
- 10.1093/ptep/ptz106

[15]

Beam Background at SuperKEKB During Phase 2 Operation

Antonio Paladino
(
- KEK, Tsukuba
)

•
DOI:
- 10.18429/JACoW-eeFACT2018-WEXBA06

[16]

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations

J. Alwall
(
- Taiwan, Natl. Taiwan U.
)
,
R. Frederix
(
- CERN
)
,
S. Frixione
(
- CERN
)
,
V. Hirschi
(
- SLAC
)
,
F. Maltoni
(
- Louvain U., CP3
)

et al.

- JHEP 07 (2014) 079
•
e-Print:
- 1405.0301
•
DOI:
- 10.1007/JHEP07(2014)079

[17]

The Precision Monte Carlo event generator K K for two fermion final states in e+ e- collisions

S. Jadach
(
- DESY and
- Cracow, INP and
- CERN
)
,
B.F.L. Ward
(
- Tennessee U. and
- CERN and
- SLAC
)
,
Z. Was
(
- Cracow, INP and
- CERN
)

- Comput.Phys.Commun. 130 (2000) 260-325
•
e-Print:
- hep-ph/9912214
•
DOI:
- 10.1016/S0010-4655(00)00048-5

[18]

Simulation of electron-positron annihilation into hadrons with the event generator PHOKHARA

- JHEP 08 (2013) 110
•
e-Print:
- 1306.1985
•
DOI:
- 10.1007/JHEP08(2013)110

[19]

Photon pair production at flavour factories with per mille accuracy

G. Balossini
(
- Pavia U. and
- INFN, Pavia
)
,
C. Bignamini
(
- Pavia U.
)
,
C.M.Carloni Calame
(
- INFN, Pavia and
- Southampton U.
)
,
G. Montagna
(
- Pavia U. and
- INFN, Pavia
)
,
O. Nicrosini
(
- INFN, Pavia
)

et al.

- Phys.Lett.B 663 (2008) 209-213
•
e-Print:
- 0801.3360
•
DOI:
- 10.1016/j.physletb.2008.04.007

[20]

Universal Interface of TAUOLA Technical and Physics Documentation

N. Davidson
(
- Cracow, INP and
- Melbourne U.
)
,
G. Nanava
(
- Bonn U.
)
,
T. Przedzinski
(
- Jagiellonian U.
)
,
E. Richter-Was
(
- Jagiellonian U. and
- Cracow, INP
)
,
Z. Was
(
- Cracow, INP
)

- Comput.Phys.Commun. 183 (2012) 821-843
•
e-Print:
- 1002.0543
•
DOI:
- 10.1016/j.cpc.2011.12.009

[21]

Complete Lowest Order Calculations for Four Lepton Final States in electron-Positron Collisions

- Nucl.Phys.B 253 (1985) 441-463
•
DOI:
- 10.1016/0550-3213(85)90541-3

[22]

GEANT4 - A Simulation Toolkit

GEANT4

Collaboration

•

S. Agostinelli
(
- Genoa U.
)

et al.

- Nucl.Instrum.Meth.A 506 (2003) 250-303
•
DOI:
- 10.1016/S0168-9002(03)01368-8

[23]

The Belle II Core Software

- Comput.Softw.Big Sci. 3 (2019) 1, 1,
- Comput. Softw. Big Sci. 3 (2019) no.1
•
e-Print:
- 1809.04299
•
DOI:
- 10.1007/s41781-018-0017-9

[24]

A Study of the Reactions $\psi^\prime \to \gamma \gamma \psi$

M. Oreglia
(
- SLAC
)

- SLAC Stanford - SLAC-236 (80,REC.APR. 81) 226p

[25]

Charmonium Spectroscopy From Radiative Decays of the $J/\psi$ and $\psi^\prime$

John Erthal Gaiser
(
- SLAC
)

- SLAC Stanford - SLAC-255 (82,REC.JUN.83) 194p

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