Experiment on 2 γ-quantum annihilation on the VEPP-2

Балакин, В.Е.; Budker, G.I.; Пахтусова, Е. В.; Sidorov, V.; Skrinskiy, A.N.; Tumaikin, G.M.; Khabakhpashev, A.G.

doi:10.1016/0370-2693(71)90518-1

Cited by 14 publications

(7 citation statements)

References 2 publications

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“…This process, which was observed in Novosibirsk with VEPP-2 [27] and in Frascati, with ADONE [28] in the range with E beam = 0.7 − 1.2 GeV , was aimed at verification of QED. Other channels of annihilation into pairs of muons, pions, kaons followed, as Touschek had envisaged in his draft proposals.…”

Section: How Touschek Learnt To Build Acceleratorsmentioning

confidence: 99%

Birth of colliding beams in Europe, two photon studies at Adone

Bonolis,

Pancheri

2015

Preprint

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This article recalls the birth of the first electron-positron storage ring AdA, and the construction of the higher energy collider ADONE, where early photon-photon collisions were observed. The events which led the Austrian physicist Bruno Touschek to propose and construct AdA will be recalled, starting with early work on the Widerøe's betatron during World War II, up to the construction of ADONE, and the theoretical contribution to radiative corrections to electron-positron collisions.

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Section: How Touschek Learnt To Build Acceleratorsmentioning

confidence: 99%

Birth of colliding beams in Europe, two photon studies at Adone

Bonolis,

Pancheri

2015

Preprint

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“…2. Two-photon annihilation of electron-positron pair measured on VEPP-2 collider in Novosibirsk with beam energy ε = 500 MeV [32] results Λ ± > 1.3 GeV and measured in Frascati (Adone collider) with beam energy ε = 700 − 1200 MeV [31] gives Λ − > 2.0 GeV and Λ + > 2.6 GeV. In this reaction both the modifications of vertex and of electron propagator in a consistent (gauge invariant) way were introduced.…”

Section: Radiative Correctionsmentioning

confidence: 99%

On Coherent Radiation in Electron-Positron Colliders

Baier

Katkov

2004

Quantum Aspects of Beam Physics 2003

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The electromagnetic processes in linear colliders are discussed on the basis of quasiclassical operator method. The complete set of expressions is written down for spectral probability of radiation from an electron and pair creation by a photon taking into account both electron and photon polarization. Some new formulas are derived for radiation intensity and its asymptotics. The main mechanisms of pair creation dominate at χ ≤ 1 are discussed.

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“…Indirect measurements of this process have however been performed in the laboratory through the measurement of several close mechanisms, such as the e − e + annihilation into two photons [6,7] (inverse process), or the pair production in the collision of one high energy photon with several low energy photons [8,9] (multiphoton Breit-Wheeler process, Figure 1b), the collision of a real photon with an electric field, interpreted in the theoretical framework of QED as a virtual photon [10,11] (such as the Bethe-Heitler process when the electric field arises from atomic nuclei, Figure 1c), or through the collision of two virtual photons in charged particle collisions [12,13] (Landau-Lifshitz process for charges q 1 and q 2 in Figure 1d). These virtual photon collision processes have already been widely investigated [14,15] but are still of great interest nowadays [16,17].…”

Section: Introductionmentioning

confidence: 99%

Electron-positron pair production in the collision of real photon beams with wide energy distributions

Esnault,

d'Humières,

Arefiev

et al. 2021

Preprint

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The creation of an electron-positron pair in the collision of two real photons, namely the linear Breit-Wheeler process, has never been detected directly in the laboratory since its prediction in 1934 despite its fundamental importance in quantum electrodynamics and astrophysics. In the last few years, several experimental setup have been proposed to observe this process in the laboratory, relying either on thermal radiation, Bremsstrahlung, linear or multiphoton inverse Compton scattering photons sources created by lasers or by the mean of a lepton collider coupled with lasers. In these propositions, the influence of the photons' energy distribution on the total number of produced pairs has been taken into account with an analytical model only for two of these cases. We hereafter develop a general and original, semi-analytical model to estimate the influence of the photons energy distribution on the total number of pairs produced by the collision of two such photon beams, and give optimum energy parameters for some of the proposed experimental configurations. Our results shows that the production of optimum Bremsstrahlung and linear inverse Compton sources are, only from energy distribution considerations, already reachable in today's facilities. Despite its less interesting energy distribution features for the LBW pair production, the photon sources generated via multiphoton inverse Compton scattering by the propagation of a laser in a micro-channel can also be interesting, thank to the high collision luminosity that could eventually be reached by such configurations. These results then gives important insights for the design of experiments intended to detect linear Breit-Wheeler produced positrons in the laboratory for the first time.

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Experiment on 2 γ-quantum annihilation on the VEPP-2

Cited by 14 publications

References 2 publications

Birth of colliding beams in Europe, two photon studies at Adone

Birth of colliding beams in Europe, two photon studies at Adone

On Coherent Radiation in Electron-Positron Colliders

Electron-positron pair production in the collision of real photon beams with wide energy distributions

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