Production of knock-on electrons by cosmic-ray muons underground (148 m w.e.)

Chaudhuri, N.; Sinha, M. K.

doi:10.1007/bf02734821

Cited by 14 publications

(4 citation statements)

References 11 publications

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“…In the 60s, experiments at CERN and Brookhaven measured this scattering cross section using accelerator-produced muons [1][2][3][4]. At the same time, µe collisions were measured by cosmic-ray experiments [5][6][7][8]. The scattering of muons off polarized electrons was then proposed as a polarimeter for high-energy muon beams in the late 80s [9] and measured by the SMC collaboration at CERN a few years later [10].…”

Section: Introductionmentioning

confidence: 99%

Master integrals for the NNLO virtual corrections to μe scattering in QED: the planar graphs

Mastrolia

Passera

Primo

et al. 2017

J. High Energ. Phys.

118

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We evaluate the master integrals for the two-loop, planar box-diagrams contributing to the elastic scattering of muons and electrons at next-to-next-to leading-order in QED. We adopt the method of differential equations and the Magnus exponential series to determine a canonical set of integrals, finally expressed as a Taylor series around four space-time dimensions, with coefficients written as combination of generalised polylogarithms. The electron is treated as massless, while we retain full dependence on the muon mass. The considered integrals are also relevant for crossing-related processes, such as di-muon production at e + e − -colliders, as well as for the QCD corrections to top-pair production at hadron colliders.

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Section: Introductionmentioning

confidence: 99%

Master integrals for the NNLO virtual corrections to μe scattering in QED: the planar graphs

Mastrolia

Passera

Primo

et al. 2017

J. High Energ. Phys.

118

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“…The correction factors for zenith angles of 78" and 60" are 1. 75 energy at the detector The discussed corrections have been applied to the experimental results shown in fig. 56.…”

Section: Muons Frotn Neutrino Interactionsmentioning

confidence: 99%

Electromagnetic Interactions of High Energy Cosmic Ray Muons

Grupen

1976

Fortschr. Phys.

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This paper investigates the electromagnetic interactions of muons. The various processes such as knock‐on electron‐, bremsstrahlung‐, direct electron pair production, and nuclear interactions are described in detail. The energy range concerned extends from 109 eV up to 1015 eV for primary muons and from 108 eV up to 1014 eV for energy transfers to the secondaries. On the one hand the measurement of muon interactions represents a test of quantum electrodynamics. On the other hand the high energies available in cosmic rays would possibly lead to the measurement of new processes or the detection of new particles. One hopes to find in the high energy domain the answer to the question why the muon exists at all and if there are properties (apart from differences in mass, lifetime, and lepton number) which distinguish it from a mere heavy electron. The different experimental techniques are described and the various experimental results on muon interactions are presented and compared with relevant QED‐theories. Observed deviations between theory and experiment and anomalies in muon interactions are critically investigated and discussed in the light of experimental difficulties and interpretation problems. In general, agreement between theory and experiment is found, i.e. QED‐theories describe the results adequately. However, some experiments claim to have detected anomalies in muon physics in the cosmic ray beam. But the hypotheses on new processes and new particles in the high energy range do not withstand a critical analysis. It is concluded that the observed deviations can be understood in the framework of conventional theories.

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“…Other mechanisms responsible for such dileptons production, although more suppressed, are the production of dimuon through a virtual photon (Trident process) or through highly energetic knock-on electrons (see e.g. [57][58][59][60]). The dimuon yield, suppressed by a factor of (m e /m µ ) 5 compared to electron bremsstrahlung, is estimated through MC simulations to be ∼ 10 −7 per MOT.…”

Section: Introductionmentioning

confidence: 99%

Prospects in the search for a new light $Z'$ boson with the NA64$μ$ experiment at the CERN SPS

Sieber,

Banerjee,

Crivelli

et al. 2021

Preprint

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A light Z vector boson coupled to the second and third lepton generations through Lµ − Lτ current with mass below 200 MeV provides a very viable explanation in terms of new physics to the recently confirmed (g − 2)µ anomaly. This boson can be produced in the bremsstrahlung reaction µN → µN Z after a high energy muon beam collides with a target. NA64µ is a fixed-target experiment using a 160 GeV muon beam from the CERN Super Proton Synchrotron accelerator looking for the Z production and its subsequent decays, Z → invisible. In this paper, we present the study of the NA64µ sensitivity to search for such a Z . This includes a realistic beam simulation, the detailed detectors description and a discussion about the main potential background sources. A pilot run is scheduled in order to validate the simulation results. If those are confirmed, NA64µ will be able to explore all the remaining phase space which could provide an explanation for the g − 2 muon anomaly.

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Production of knock-on electrons by cosmic-ray muons underground (148 m w.e.)

Cited by 14 publications

References 11 publications

Master integrals for the NNLO virtual corrections to μe scattering in QED: the planar graphs

Master integrals for the NNLO virtual corrections to μe scattering in QED: the planar graphs

Electromagnetic Interactions of High Energy Cosmic Ray Muons

Prospects in the search for a new light $Z'$ boson with the NA64$μ$ experiment at the CERN SPS

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