Publisher's Note: Angular Distributions for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">H</mml:mi><mml:mprescripts/><mml:mi>Λ</mml:mi><mml:mrow><mml:mn>3</mml:mn><mml:mo>,</mml:mo><mml:mn>4</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>Bound States in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">H</mml:mi><mml:mi mathvariant="normal">e</m

Dohrmann, F.; Ahmidouch, A.; Armstrong, Carol S.; Arrington, J.; Asaturyan, R.; Avery, S.; Bailey, K.; Bitao, H.; Breuer, H.; Brown, D. S.; Carlini, R.; Cha, J.; Chant, N.; E., Christy,; Cochran, A.; Cole, L.; Crowder, J.; Danagoulian, S.; Elaasar, M.; Ent, R.; Fenker, H.; Fujii, Y.; L., Gan,; Garrow, K.; Geesaman, D. F.; Gueye, P.; Hafidi, K.; Hinton, W.; Juengst, H.; Keppel, C.; Liang, Y.; Liu, J. H.; Lung, A.; Mack, D.; Markowitz, P.; Mitchell, J.; Miyoshi, T.; Mkrtchyan, H.; Mtingwa, S. K.; B., Mueller,; Niculescu, G.; Niculescu, I.; Potterveld, D.; Raue, B. A.; Reimer, P. E.; Reinhold, J.; Roche, J.; Sarsour, M.; Sato, Y.; Segel, R. E.; Semenov, A.; Stepanyan, S.; Tadevosian, V.; Tajima, S.; Tang, L.; Uzzle, A.; Wood, S.; Yamaguchi, H.; Yan, C.; Yuan, L.; Zeidman, B.; Zeier, M.; Zihlmann, B.

doi:10.1103/physrevlett.93.259902

Cited by 11 publications

(17 citation statements)

References 8 publications

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“…A realistic experimental approach to the precision measurement of B Λ ( 3 Λ H) seems to rely on the electroproduction reaction on a 3 He target. Production of 3 Λ H with the (e,e K + ) reaction on 3 He was already observed in a first generation experiment at JLab featuring a missing mass resolution of 4 MeV [35]. Preliminary evaluations of the event rate which is expected with the high resolution spectrometers in operation at JLab may be found in Ref.…”

Section: Discussionmentioning

confidence: 95%

On the binding energy and the charge symmetry breaking in A ≤ 16 Λ-hypernuclei

2017

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In recent years, several experiments using magnetic spectrometers provided high precision results in the field of Hypernuclear Physics. In particular, the accurate determination of the Λ-binding energy, B Λ , contributed to stimulate considerably the discussion about the Charge Symmetry Breaking effect in Λ-hypernuclei isomultiplets.We have reorganized the results from the FINUDA experiment and we have obtained a series of B Λ values for Λ-hypernuclei with A ≤ 16 by taking into account data only from magnetic spectrometers implementing an absolute calibration of the energy scale (FINUDA at DAΦNE and electroproduction experiments at JLab and at MaMi). We have then critically revisited the results obtained at KEK by the SKS Collaboration in order to make possible a direct comparison between data from experiments with and without such an absolute energy scale. A synopsis of recent spectrometric measurements of B Λ is presented, including also emulsion experiment results.Several interesting conclusions are drawn, among which the equality within the errors of B Λ for the A = 7, 12, 16 isomultiplets, based only on recent spectrometric data. This observation is in nice agreement with a recent theoretical prediction.Ideas for possible new measurements which should improve the present experimental knowledge are finally put forward.

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Section: Discussionmentioning

confidence: 95%

On the binding energy and the charge symmetry breaking in A ≤ 16 Λ-hypernuclei

2017

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“…Hypernuclear clusters can be produced and studied in various experimental setups, e.g. from proton or antiproton induced reactions [44] as well as pion and kaon beams [45,46,47,48,49]. In this work we will focus on the production of hypernuclei in high energy collisions of Au+Au ions [50].…”

Section: Introductionmentioning

confidence: 99%

Hypernuclei, dibaryon and antinuclei production in high energy heavy ion collisions: Thermal production vs. coalescence

et al. 2012

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We study the production of (hyper-)nuclei and di-baryons in most central heavy Ion collisions at energies of $E_{lab}=1-160 A$ GeV. In particular we are interested in clusters produced from the hot and dense fireball. The formation rate of strange and non-strange clusters is estimated by assuming thermal production from the intermediate phase of the UrQMD-hydro hybrid model and alternatively by the coalescence mechanism from a hadronic cascade model. Both model types are compared in detail. For most energies we find that both approaches agree in their predictions for the yields of the clusters. Only for very low beam energies, and for di-baryons including $Xi$'s, we observe considerable differences. We also study the production of anti-matter clusters up to top RHIC energies and show that the observation of anti-$^4He$ and even anti-$^4_{Lambda}He$ is feasible. We have found a considerable qualitative difference in the energy dependence of the strangeness population factor $R_H$ when comparing the thermal production with the coalescence results

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“…By tuning the QW asymmetry, longer DP spin relaxation times along the in-plane [110] direction was demonstrated [22][23][24][25]. For (110) quantum wells, it turns out that the effective magnetic field due to the BIA term is oriented along the [110] growth direction (equation 2b) [5]; if the electron spin S z is also aligned along this direction, the DP spin relaxation mechanism is suppressed, leading to τ z s , as long as 20 ns for electrons spins parallel to [110] [26,27]. This is not true for spins prepared in other directions due to strongly anisotropic spin relaxation in these (110) GaAs quantum wells [27][28][29].…”

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confidence: 99%

“…For (110) quantum wells, it turns out that the effective magnetic field due to the BIA term is oriented along the [110] growth direction (equation 2b) [5]; if the electron spin S z is also aligned along this direction, the DP spin relaxation mechanism is suppressed, leading to τ z s , as long as 20 ns for electrons spins parallel to [110] [26,27]. This is not true for spins prepared in other directions due to strongly anisotropic spin relaxation in these (110) GaAs quantum wells [27][28][29]. In contrast to (100) and (110) QW, where the DP spin relaxation vanishes for one given spin direction, it can be suppressed in principle for the three directions in space for (111) quantum wells, since the conduction bands can become spin degenerate to first order in k [30][31][32].…”

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confidence: 99%

Full Electrical Control of the Electron Spin Relaxation in GaAs Quantum Wells

et al. 2011

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The electron spin dynamics in (111)-oriented GaAs/AlGaAs quantum wells is studied by timeresolved photoluminescence spectroscopy. By applying an external field of 50 kV/cm a two-order of magnitude increase of the spin relaxation time can be observed reaching values larger than 30 ns; this is a consequence of the electric field tuning of the spin-orbit conduction band splitting which can almost vanish when the Rashba term compensates exactly the Dresselhaus one. The measurements under transverse magnetic field demonstrate that the electron spin relaxation time for the three space directions can be tuned simultaneously with the applied electric field.The control of the electron spins in semiconductors for potential use in transport devices or quantum information applications has attracted a great attention in recent years [1][2][3]. In 2D nanostructures made of III-V or II-VI semiconductors, the dominant loss of electron spin memory is related to the spin relaxation mechanism known under the name Dyakonov-Perel (DP) [4,5]. In these materials, the absence of inversion symmetry and the spin-orbit (SO) coupling are responsible for the lifting of degeneracy for spin | 1/2 and | −1/2 electrons states in the conduction band (CB). This splitting plays a crucial role for the spin manipulation and spin transport phenomena [6,7]. As it depends strongly on the crystal and nanostructure symmetry [8][9][10], it can be efficiently tailored as explained below. The SO splitting can be viewed as the result of the action on the electron spin of an effective magnetic field whose amplitude and direction depend on the wave vector k of the electron. The electronic spin will precess around this field with an effective, momentum dependent, Larmor vector Ω whose magnitude corresponds to the CB spin splitting. This effective magnetic field changes with time since the direction of electron momentum varies due to electron collisions. As a consequence, spin precession around this field in the intervals between collisions gives rise to spin relaxation. In the usual case of frequent collisions, the relaxation time of an electron spin oriented along the direction i can be written [4]:where Ω 2 ⊥ is the mean square precession vector in the plane perpendicular to the direction i (i=x, y, z) and τ * p the electron momentum relaxation time. This yields the loss of the electron spin memory in a few tens or hundreds of picoseconds [11,12]. As the driving force in the DP spin relaxation is the SO splitting, its reduction is expected to lead to an increase of the spin relaxation time [13,14]. In bulk zinc blende semiconductor, the Bulk Inversion Asymmetry (BIA) spin splitting, also called Dresselhaus term, is determined by [1,8]:where γ is the Dresselhaus coefficient and k = (k x , k y , k z ) the electron wavector. In a quantum well (QW) where the momentum component along the growth axis z is quantized, the vector Ω due to the BIA for the lowest electron sub-band writes:where k 2 z is the averaged squared wavevector along the growth direction and k the...

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Publisher's Note: Angular Distributions forHΛ3,4Bound States in theHe

Cited by 11 publications

References 8 publications

On the binding energy and the charge symmetry breaking in A ≤ 16 Λ-hypernuclei

On the binding energy and the charge symmetry breaking in A ≤ 16 Λ-hypernuclei

Hypernuclei, dibaryon and antinuclei production in high energy heavy ion collisions: Thermal production vs. coalescence

Full Electrical Control of the Electron Spin Relaxation in GaAs Quantum Wells

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