Journal
NATURE PHYSICS
Volume 13, Issue 9, Pages 852-+Publisher
NATURE PORTFOLIO
DOI: 10.1038/NPHYS4208
Keywords
-
Categories
Funding
- BCKDF
- Canada Council
- CANARIE
- CRC
- Compute Canada
- FQRNT
- Ontario Innovation Trust, Canada
- EPLANET
- ERC
- ERDF
- FP7
- Horizon 2020
- Marie Sklodowska-Curie Actions, European Union
- Investissements dAvenir Labex and Idex
- ANRRegion Auvergne
- Fondation Partager le Savoir, France
- DFG, Germany
- AvH Foundation, Germany
- Thales programme
- Aristeia programme
- EU-ESF
- Greek NSRF
- BSF, Israel
- GIF, Israel
- Minerva, Israel
- BRF, Norway
- CERCA Programme Generalitat de Catalunya, Generalitat Valenciana, Spain
- Royal Society, United Kingdom
- Leverhulme Trust, United Kingdom
- Science and Technology Facilities Council [GRIDPP, 1653101, ST/K003666/1, ATLAS, ST/N000277/1, ST/H001158/2, ST/H001158/1, ST/M001431/1, ST/N000234/1, ST/M006417/1, PP/E000452/1, ST/K001361/1, 1366825, ST/I005846/1, ST/L005662/1, ST/L001144/1, ST/N000331/1] Funding Source: researchfish
- Division Of Physics
- Direct For Mathematical & Physical Scien [1624739] Funding Source: National Science Foundation
- Fundação para a Ciência e a Tecnologia [CERN/FIS-NUC/0005/2015] Funding Source: FCT
- STFC [ST/M001431/1] Funding Source: UKRI
Ask authors/readers for more resources
Light-by-light scattering (gamma gamma -> gamma gamma) is a quantum-mechanical process that is forbidden in the classical theory of electrodynamics. This reaction is accessible at the Large Hadron Collider thanks to the large electromagnetic field strengths generated by ultra-relativistic colliding lead ions. Using 480 mu b(-1) of lead-lead collision data recorded at a centre-of-mass energy per nucleon pair of 5.02 TeV by the ATLAS detector, here we report evidence for light-by-light scattering. A total of 13 candidate events were observed with an expected background of 2.6 +/- 0.7 events. After background subtraction and analysis corrections, the fiducial cross-section of the process Pb + Pb (gamma gamma) -> Pb-(center dot) + Pb-(center dot) gamma gamma, for photon transverse energy E-T > 3 GeV, photon absolute pseudorapidity vertical bar eta vertical bar < 2.4, diphoton invariant mass greater than 6 GeV, diphoton transverse momentum lower than 2 GeV and diphoton acoplanarity below 0.01, is measured to be 70 +/- 24 (stat.) +/- 17 (syst.) nb, which is in agreement with the standard model predictions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available