CERN Accelerating science

ATLAS Note
Report number	ATL-FWD-PROC-2024-001
Title	Exclusive Pion Pair Production at $\sqrt{s} = 7$ TeV
Author(s)	Trzebinski, Maciej (Polish Academy of Sciences (PL))
Corporate Author(s)	The ATLAS collaboration
Collaboration	ATLAS Collaboration
Publication	2024
Imprint	12 Jan 2024
Number of pages	5
In:	PoS LHCP2023 (2024) 257
In:	11th Large Hadron Collider Physics Conference 2023, Belgrade, Serbia, 22 - 26 May 2023, pp.257
DOI	10.22323/1.450.0257
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	ATLAS ; ALFA ; exclusive ; pions ; protons
Abstract	The exclusive pion pair production cross-section in diffractive proton-proton collisions ($pp \to p \pi^+ \pi^- p$) was measured during the special low luminosity LHC runs at $\sqrt{s} = 7$ TeV with dedicated $\beta^* = 90$ m LHC optics. Pion pairs were detected by the ATLAS Inner Detector whereas the outgoing protons were measured by ALFA (Absolute Luminosity For ATLAS) detector situated on both sides of ATLAS forward region $\sim$240 m from the ATLAS Interaction Point (IP). An overview of the analysis results is presented as well as a comparison of obtained measurements with relevant model predictions.

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