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LEP3: A High Luminosity e+e- Collider in the LHC tunnel to study the Higgs Boson

Authors
Zimmermann, F.
Koratzinos, M.
Zanetti, M.
Published in International Particle Accelerator Conference (IPAC'12). New Orleans, Louisiane (USA) - 20-25 mai 2012 - JACoW (Joint Accelerator Conferences Website). 2012, p. 2005-2007
Abstract Recent indications from the LHC suggest that the Higgs boson might be light, within the mass range 115- 130 GeV. Such object could be studied at an e+e− collider with about 240-GeV centre-of-mass energy. A corresponding Higgs factory – ‘LEP3' – could be installed in the LHC tunnel, reducing its cost and also allowing for a second life of the two LHC generalpurpose detectors. We present preliminary accelerator and beam parameters for LEP3 [1] tailored so as to provide a peak luminosity of 1034 cm-2s-1 at each of two experiments, while respecting a number of constraints including beamstrahlung limits. At this luminosity around 20,000 Higgs events per year per experiment could be obtained for a Standard Model Higgs boson with a mass of 115-130 GeV. For the parameters considered the estimated luminosity lifetime is about 16 minutes, and the synchrotron radiation losses are 50 MW per beam. High operational efficiency requires two rings: a low emittance collider storage ring operating at constant energy, and a separate accelerator to top up the colliding beams every few minutes. The alternative of a larger ring collider installed in a new, bigger tunnel will also be discussed. The LEP3 collider could as well operate on the Z resonance, where it would achieve luminosities above 1035 cm-2s-1
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ISBN: 978-3-95450-115-1
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BLONDEL, Alain et al. LEP3: A High Luminosity e+e- Collider in the LHC tunnel to study the Higgs Boson. In: International Particle Accelerator Conference (IPAC'12). New Orleans, Louisiane (USA). [s.l.] : JACoW (Joint Accelerator Conferences Website), 2012. p. 2005-2007. https://archive-ouverte.unige.ch/unige:39882

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Deposited on : 2014-09-01

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