scholarly journals A measurement of the transverse polarization of $\Lambda$ -hyperons produced in inelastic pN-reactions at 450 GeV proton energy

1999 ◽  
Vol 6 (2) ◽  
pp. 265-269 ◽  
Author(s):  
V. Fanti et al.
Keyword(s):  
Proton Energy ◽  
Transverse Polarization ◽  
Lambda Hyperons

scholarly journals The measurement of the transverse polarization of $\Lambda$ hyperons produced in nC reactions in the EXCHARM experiment

2000 ◽  
Vol 13 (3) ◽  
pp. 427-432 ◽  
Author(s):  
A.N. Aleev ◽  
V.P. Balandin ◽  
E.A. Dvalishvili ◽  
A.N. Gaponenko ◽  
A.V. Gusev ◽  
...  
Keyword(s):  
Transverse Polarization ◽  
Lambda Hyperons

scholarly journals The transverse polarization of $$\Lambda $$ hyperons in $$e^+e^-\rightarrow \Lambda ^\uparrow h X$$ processes within TMD factorization

2021 ◽  
Vol 81 (4) ◽  
Author(s):  
Hui Li ◽  
Xiaoyu Wang ◽  
Yongliang Yang ◽  
Zhun Lu
Keyword(s):  
Fragmentation Function ◽  
Belle Collaboration ◽  
Form Factors ◽  
Transverse Polarization ◽  
Kinematical Region ◽  
Diquark Model ◽  
Transverse Momentum Dependent ◽  
Lambda Hyperons ◽  
Fragmentation Functions ◽  
The Spectator

AbstractWe investigate the transverse polarization of the $$\Lambda $$ Λ hyperon in the processes $$e^+e^-\rightarrow \Lambda ^\uparrow \pi ^\pm X$$ e + e - → Λ ↑ π ± X and $$e^+e^-\rightarrow \Lambda ^\uparrow K^\pm X$$ e + e - → Λ ↑ K ± X within the framework of the transverse momentum dependent (TMD) factorization. The transverse polarization is contributed by the convolution of the transversely polarizing fragmentation function (PFF) $$D_{1T}^\perp $$ D 1 T ⊥ of the lambda hyperon and the unpolarized fragmentation function $$D_1$$ D 1 of pion/kaon. We adopt the spectator diquark model result for $$D_{1T}^{\perp }$$ D 1 T ⊥ to numerically estimate the transverse polarization in $$e^+e^-\rightarrow \Lambda ^\uparrow h X$$ e + e - → Λ ↑ h X process at the kinematical region of Belle Collaboration. To implement the TMD evolution formalism of the fragmentation functions, we apply two different parametrizations on the nonperturbative Sudakov form factors associated with the fragmentation functions of the $$\Lambda $$ Λ , pion and kaon. It is found that our prediction on the polarization in the $$\Lambda \pi ^+$$ Λ π + production and $${\bar{\Lambda }} \pi ^-$$ Λ ¯ π - is consistent with the recent Belle measurement in size and sign, while the model predictions on the polarizations in $$\Lambda \pi ^-$$ Λ π - and $$\Lambda K^\pm $$ Λ K ± productions show strong disagreement with the Belle data. The reason for the discrepancies is discussed and possible approaches to improve the calculation in the future are also discussed.

Proton energy loss spectroscopy for surface layer analysis in the monolayer regime

1986 ◽  
Vol 15 (1-6) ◽  
pp. 142-145 ◽  
Author(s):  
Tomoki Oku ◽  
Jun-ichi Kanasaki ◽  
Noriaki Matsunami ◽  
Noriaki Itoh ◽  
Kozi Matsuda ◽  
...  
Keyword(s):  
Surface Layer ◽  
Energy Loss ◽  
Proton Energy ◽  
Layer Analysis

scholarly journals Supersymmetric prediction for the muon transverse polarization in theK+→π0μ+νμdecay

1997 ◽  
Vol 55 (9) ◽  
pp. 5334-5340 ◽  
Author(s):  
Marco Fabbrichesi ◽  
Francesco Vissani
Keyword(s):  
Transverse Polarization

Measurement of the quantum efficiency of an electron multiplier as a function of incident proton energy

1975 ◽  
Vol 46 (9) ◽  
pp. 1273-1274 ◽  
Author(s):  
Z. H. Cho ◽  
M. Singh ◽  
A. Mohabbatizadeh ◽  
J. Chai ◽  
H. Cheung ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Proton Energy ◽  
Incident Proton ◽  
Electron Multiplier ◽  
Incident Proton Energy
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