# Hebrew University of Jerusalem

Jerusalem, Israel

## Departments View all

1,988
Total Impact Points
144
Members
2,429
Total Impact Points
127
Members
2,091
Total Impact Points
120
Members

## Recent Publications View all

• Source
##### Article: Few-body calculations of η-nuclear quasibound states
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ABSTRACT: We report on precise hyperspherical-basis calculations of $\eta NN$ and $\eta NNN$ quasibound states, using energy dependent $\eta N$ interaction potentials derived from coupled-channel models of the $S_{11}$ $N^{\ast}(1535)$ nucleon resonance. The $\eta N$ attraction generated in these models is too weak to generate a two-body bound state. No $\eta NN$ bound-state solution was found in our calculations in models where Re $a_{\eta N}\lesssim 1$ fm, with $a_{\eta N}$ the $\eta N$ scattering length, covering thereby the majority of $N^{\ast}(1535)$ resonance models. A near-threshold $\eta NNN$ bound-state solution, with $\eta$ separation energy of less than 1 MeV and width of about 15 MeV, was obtained in the 2005 Green-Wycech model where Re $a_{\eta N}\approx 1$ fm. The role of handling self consistently the subthreshold $\eta N$ interaction is carefully studied.
Physics Letters B 05/2015; 747. DOI:10.1016/j.physletb.2015.06.010
• Source
##### Article: Charge symmetry breaking in Λ hypernuclei revisited
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ABSTRACT: The large charge symmetry breaking (CSB) implied by the $\Lambda$ binding energy difference $\Delta B^{4}_{\Lambda}(0^+_{\rm g.s.})\equiv B_{\Lambda}(_{\Lambda}^4$He)$-$$B_{\Lambda}(_{\Lambda}^4$H) = 0.35$\pm$0.06 MeV of the $A=4$ mirror hypernuclei ground states, determined from emulsion studies, has defied theoretical attempts to reproduce it in terms of CSB in hyperon masses and in hyperon-nucleon interactions, including one pion exchange arising from $\Lambda-\Sigma^0$ mixing. Using a schematic strong-interaction $\Lambda N\leftrightarrow\Sigma N$ coupling model developed by Akaishi and collaborators for $s$-shell $\Lambda$ hypernuclei, we revisit the evaluation of CSB in the $A=4$ $\Lambda$ hypernuclei and extend it to $p$-shell mirror $\Lambda$ hypernuclei. The model yields values of $\Delta B^{4}_{\Lambda} (0^+_{\rm g.s.})\sim 0.25$ MeV. Smaller size and mostly negative $p$-shell binding energy differences are calculated for the $A=7-10$ mirror hypernuclei, in rough agreement with the few available data. CSB is found to reduce by almost 30 keV the 110 keV $_{~\Lambda}^{10}$B g.s. doublet splitting anticipated from the hyperon-nucleon strong-interaction spin dependence, thereby explaining the persistent experimental failure to observe the $2^-_{\rm exc}\to 1^-_{\rm g.s.}$ $\gamma$-ray transition.
Physics Letters B 03/2015; 744. DOI:10.1016/j.physletb.2015.04.009
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##### Article: Proteostasis collapse, inter-tissue communication, and the regulation of aging at the organismal level
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ABSTRACT: The ongoing debate of whether the aging process is driven by stochastic events or regulated by biological mechanisms is nearly a century old. While numerous studies strongly support the idea that signaling and metabolic pathways govern the pace of aging, other findings suggest that a sequence of stochastic events underlies the progression of this process. Two recent developments in the field of aging provide affirmation to the notion that aging has regulated aspects. First, the collapse of proteome integrity (proteostasis), a prominent aspect of aging, occurs within a surprisingly narrow time window, shortly after transition of the nematode Caenorhabditis elegans to adulthood. In addition, inter-tissue communication was found to play key roles in proteostasis maintenance across tissues and to affect the worm's lifespan. Here we briefly review the current knowledge in the field and delineate the experimental evidence which indicates that aging is a complex, multi-factorial process whose pace is determined by both random events and regulatory mechanisms.
Frontiers in Genetics 03/2015; 6:80. DOI:10.3389/fgene.2015.00080

#### Information

Jerusalem, Israel
• Head of Institution
Amir Steinman
• Website
www.huji.ac.il
• Phone
972-8-9489918
• Fax
972-2-658-4437
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## Top publications last week by reads

 Recent Bio-Applications of Sol–Gel Materials Journal of Materials Chemistry 03/2006; 16(11). DOI:10.1039/b512706h 889 Reads Requests and Apologies: A Cross-Cultural Study of Speech Act Realization Patterns (CCSARP)1 Applied Linguistics 03/1984; 5(3). DOI:10.1093/applin/5.3.196 117 Reads

#### Top Collaborating Institutions

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Total Impact Points
4243
Members
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Total Impact Points
518
Members

#### Collaborations

This map visualizes which other institutions researchers from Hebrew University of Jerusalem have collaborated with.

## Rg score distribution

See how the RG Scores of researchers from Hebrew University of Jerusalem are distributed.