Measurement of the production cross section for
Z gamma to nu nu gamma in pp collisions at sqrt(s) = 8 TeV and
limits on Z Z gamma and Z gamma gamma triple gauge boson couplings

collected with the CMS detector at the LHC. This measurement is based on the observation of events with missing transverse momentum above 140 GeV and a single photon with transverse momentum above 145 GeV and absolute pseudorapidity range

|\eta| < 1.44

. The measured Z

\gamma\rightarrow\nu\bar{\nu}\gamma

production cross section,

52.7 \pm 2.1 \rm{(stat.)} \pm 6.4 \rm{(syst.)} \pm 1.4 \rm{(lumi.)}

fb, agrees well with the standard model prediction of

50.0 + 2.4 - 2.2

fb. The results yield the most stringent limits to date on the anomalous ZZ

\gamma

and Z

\gamma\gamma

trilinear gauge boson couplings.

Note:

Preliminary results

Data
p p: scattering
p p: colliding beams
gauge boson: pair production
Z0: leptonic decay
gauge boson: coupling
coupling: (3gauge boson)
coupling: (2Z0 photon)
coupling: (Z0 2photon)
coupling: anomaly

References(27)

Figures(6)

[1]

Study of trilinear gauge boson couplings at the Tevatron collider

John Ellison
(
- UC, Riverside
)
,
Jose Wudka
(
- UC, Riverside
)

- Ann.Rev.Nucl.Part.Sci. 48 (1998) 33-80
•
e-Print:
- hep-ph/9804322
•
DOI:
- 10.1146/annurev.nucl.48.1.33

[2]

Probing the Weak Boson Sector in e+ e- ---> W+ W-

- Nucl.Phys.B 282 (1987) 253-307
•
DOI:
- 10.1016/0550-3213(87)90685-7

[3]

Measurement of the Production Cross Section for $Z\gamma \to \nu\bar{\nu}\gamma$ in pp Collisions at $\sqrt{s} =$ 7 TeV and Limits on $ZZ\gamma$ and $Z\gamma\gamma$ Triple Gauge Boson Couplings

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- JHEP 10 (2013) 164
•
e-Print:
- 1309.1117
•
DOI:
- 10.1007/JHEP10(2013)164

[4]

Signatures of the anomalous $Z_{\gamma}$ and $Z Z$ production at the lepton and hadron colliders

- Phys.Rev.D 61 (2000) 073013
•
e-Print:
- hep-ph/9910395
•
DOI:
- 10.1103/PhysRevD.61.073013

[5]

Probing the weak boson sector in $Z \gamma$ production at hadron colliders

U. Baur
(
- Florida State U.
)
,
Edmond L. Berger
(
- CERN and
- Argonne
)

- Phys.Rev.D 47 (1993) 4889-4904
•
DOI:
- 10.1103/PhysRevD.47.4889

[6]

Ratios of $W^\pm \gamma$ and $Z \gamma$ cross-sections: New tools in probing the weak boson sector at the tevatron

- Phys.Rev.D 48 (1993) 4103-4120
•
e-Print:
- hep-ph/9304239
•
DOI:
- 10.1103/PhysRevD.48.4103

[7]

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

[8]

Geant4 developments and applications

et al.

- IEEE Trans.Nucl.Sci. 53 (2006) 270
•
DOI:
- 10.1109/TNS.2006.869826

[9]

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

[10]

PYTHIA 6.4 Physics and Manual

Torbjorn Sjostrand
(
- Lund U., Dept. Theor. Phys.
)
,
Stephen Mrenna
(
- Fermilab
)
,
Peter Z. Skands
(
- Fermilab
)

- JHEP 05 (2006) 026
•
e-Print:
- hep-ph/0603175
•
DOI:
- 10.1088/1126-6708/2006/05/026

[11]

New generation of parton distributions with uncertainties from global QCD analysis

J. Pumplin
(
- Michigan State U.
)
,
D.R. Stump
(
- Michigan State U.
)
,
J. Huston
(
- Michigan State U.
)
,
H.L. Lai
(
- Michigan State U.
)
,
Pavel M. Nadolsky
(
- Michigan State U.
)

et al.

- JHEP 07 (2002) 012
•
e-Print:
- hep-ph/0201195
•
DOI:
- 10.1088/1126-6708/2002/07/012

[12]

MCFM v6.1: A Monte Carlo for FeMtobarn processes at Hadron Colliders

J. Campbell
,
R. Ellis
,
C. Williams

[13]

The PDF4LHC Working Group Interim Report

Sergey Alekhin
(
- DESY, Zeuthen and
- Serpukhov, IHEP
)
,
Simone Alioli
(
- DESY, Zeuthen
)
,
Richard D. Ball
(
- Edinburgh U.
)
,
Valerio Bertone
(
- Freiburg U.
)
,
Johannes Blumlein
(
- DESY, Zeuthen
)

et al.

e-Print:
- 1101.0536

[14]

The PDF4LHC Working Group Interim Recommendations

Michiel Botje
(
- NIKHEF, Amsterdam
)
,
Jon Butterworth
(
- University Coll. London
)
,
Amanda Cooper-Sarkar
(
- Oxford U.
)
,
Albert de Roeck
(
- CERN and
- Antwerp U. and
- UC, Davis
)
,
Joel Feltesse
(
- DAPNIA, Saclay
)

et al.

e-Print:
- 1101.0538

[15]

Impact of Heavy Quark Masses on Parton Distributions and LHC Phenomenology

Richard D. Ball
(
- Edinburgh U.
)
,
Valerio Bertone
(
- Freiburg U.
)
,
Francesco Cerutti
(
- Barcelona U., ECM
)
,
Luigi Del Debbio
(
- Edinburgh U.
)
,
Stefano Forte
(
- Milan U. and
- INFN, Milan
)

et al.

- Nucl.Phys.B 849 (2011) 296-363
•
e-Print:
- 1101.1300
•
DOI:
- 10.1016/j.nuclphysb.2011.03.021

[16]

Event generation with SHERPA 1.1

et al.

- JHEP 02 (2009) 007
•
e-Print:
- 0811.4622
•
DOI:
- 10.1088/1126-6708/2009/02/007

[17]

Particle-Flow Event Reconstruction in CMS and Performance for Jets, Taus, and MET

CMS

Collaboration

[18]

Commissioning of the Particle-flow Event Reconstruction with the first LHC collisions recorded in the CMS detector

CMS

Collaboration

[19]

The anti- $k_t$ jet clustering algorithm

- JHEP 04 (2008) 063
•
e-Print:
- 0802.1189
•
DOI:
- 10.1088/1126-6708/2008/04/063

[20]

Isolated Photon Reconstruction and Identification at sqrt{s

CMS

Collaboration

[21]

Electron reconstruction and identification at sqrt(s) = 7 TeV

CMS

Collaboration

[22]

Pileup Jet Identification

CMS

Collaboration

[23]

Performance of Missing Transverse Momentum Reconstruction Algorithms in Proton-Proton Collisions at p s = 8 TeV with the CMS Detector

CMS

Collaboration

[24]

Measurement of the Inclusive $W$ and $Z$ Production Cross Sections in $pp$ Collisions at $\sqrt{s}=7$ TeV

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- JHEP 10 (2011) 132
•
e-Print:
- 1107.4789
•
DOI:
- 10.1007/JHEP10(2011)132

[25]

CMS Luminosity Based on Pixel Cluster Counting - Summer 2013 Update

CMS

Collaboration

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