Spin correlations in nonperturbative electron–positron pair creation by petawatt laser pulses colliding with a TeV proton beam

Müller, Tim-Oliver; Müller, Carsten

doi:10.1016/j.physletb.2010.12.023

Cited by 51 publications

(40 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such an information complements previous works where spin-resolved calculations of the nonlinear Breit-Wheeler process via helicity amplitudes [31] and the internal spin polarization vector [32] were performed. We note besides that comparative studies between the behavior of bosonic and fermionic particles in strong laser fields have recently been carried out with respect to Compton, Mott and Kapitza-Dirac scattering [6,33,34], nonlinear Bethe-Heitler pair creation in proton-laser collisions [35] and the Klein paradox [36,37].…”

Section: Introductionmentioning

confidence: 99%

Photo-production of scalar particles in the field of a circularly polarized laser beam

Villalba-Chávez

Müller

2013

Physics Letters B

View full text Add to dashboard Cite

The photo-production of a pair of scalar particles in the presence of an intense, circularly polarized laser beam is investigated. Using the optical theorem within the framework of scalar quantum electrodynamics, explicit expressions are given for the pair production probability in terms of the imaginary part of the vacuum polarization tensor. Its leading asymptotic behavior is determined for various limits of interest. The influence of the absence of internal spin degrees of freedom is analyzed via a comparison with the corresponding probabilities for production of spin-1 /2 particles; the lack of spin is shown to suppress the pair creation rate, as compared to the predictions from Dirac theory. Potential applications of our results for the search of minicharged particles are indicated.

show abstract

Section: Introductionmentioning

confidence: 99%

Photo-production of scalar particles in the field of a circularly polarized laser beam

Villalba-Chávez

Müller

2013

Physics Letters B

View full text Add to dashboard Cite

show abstract

“…(38)]. Note that the azimuthal angle ϕ in (17) does not coincide with the one in (14), since in the frame of reference being used the particles collide non-head-on. This implies an additional azimuthal dependence in (17), which is absent for the head-on geometry and the circularly polarized laser wave.…”

Section: B Probability Of the Process And Cross Sectionmentioning

confidence: 99%

“…Note that for an electron with γ 10 and a photon with ω ∼ 1 eV the invariant x [defined in Eq. (14)] stays rather small even for a head-on collision: x ∼ 10 −5 − 10 −4 . It is this quantity that measures the electron's energy losses during the scattering process (see, e.g., Ref.…”

Section: Analysis Of the Process With A Spin Flipmentioning

confidence: 99%

See 1 more Smart Citation

Radiative polarization of electrons in a strong laser wave

Karlovets

2011

Phys. Rev. A

View full text Add to dashboard Cite

We reanalyze the problem of radiative polarization of electrons brought into collision with a circularly polarized strong plane wave. We present an independent analytical verification of formulae for the cross section given by D.\,Yu. Ivanov et al [Eur.\ Phys.\ J. C \textbf{36}, 127 (2004)]. By choosing the exact electron's helicity as the spin quantum number we show that the self-polarization effect exists only for the moderately relativistic electrons with energy $\gamma = E/mc^2 \lesssim 10$ and only for a non-head-on collision geometry. In these conditions polarization degree may achieve the values up to 65%, but the effective polarization time is found to be larger than 1\,s even for a high power optical or infrared laser with intensity parameter $\xi = |{\bf E}| m c^2/E_c \hbar \omega \sim 0.1$ ($E_c = m^2 c^3/e \hbar$). This makes such a polarization practically unrealizable. We also compare these results with the ones of some papers where the high degree of polarization was predicted for ultrarelativistic case. We argue that this apparent contradiction arises due to the different choice of the spin quantum numbers. In particular, the quantum numbers which provide the high polarization degree represent neither helicity nor transverse polarization, that makes the use of them inconvenient in practice.Comment: minor changes compared to v3; to appear in PR

show abstract

“…Furthermore, interesting polarization effects were explored in electron-positron pair production processes in ultrastrong laser fields, in particular, during electron and positron pair creation in combined Coulomb and strong laser fields [48], in the multiphoton Bethe-Heitler process [49], and in two counterpropagating laser pulses [50]. Spin correlations in electron-positron pair creation by a laser pulse and a proton beam were examined in [51].…”

Section: Introductionmentioning

confidence: 99%

Above-threshold ionization with highly charged ions in superstrong laser fields. III. Spin effects and their dependence on laser polarization

2015

View full text Add to dashboard Cite

Spin effects in the tunneling regime of strong-field ionization of hydrogenlike highly charged ions in linearly as well as circularly polarized laser fields are investigated. The impact of the polarization of a laser field on the spin effects is analyzed. Spin-resolved differential ionization rates are calculated employing the relativistic Coulombcorrected strong-field approximation developed in the previous paper of the series. Analytical expressions for spin asymmetries and the spin-flip probability, depending on the laser's polarization, are obtained for the photoelectron momentum corresponding to the maximum of the tunneling probability. A simple intuitive model is developed for the description of spin dynamics in tunnel ionization. The spin flip is shown to be experimentally observable by using moderate highly charged ions with a charge of the order of 20 and a laser field with an intensity of I ∼ 10 22 W/cm 2 .

show abstract

Spin correlations in nonperturbative electron–positron pair creation by petawatt laser pulses colliding with a TeV proton beam

Cited by 51 publications

References 43 publications

Photo-production of scalar particles in the field of a circularly polarized laser beam

Photo-production of scalar particles in the field of a circularly polarized laser beam

Radiative polarization of electrons in a strong laser wave

Above-threshold ionization with highly charged ions in superstrong laser fields. III. Spin effects and their dependence on laser polarization

Contact Info

Product

Resources

About