Author
Robertus Timmermans
Bio: Robertus Timmermans is an academic researcher from University of Groningen. The author has contributed to research in topics: Nucleon & Dipole. The author has an hindex of 22, co-authored 110 publications receiving 1997 citations.
Papers published on a yearly basis
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TL;DR: In this article, the cutoff dependence is related to the singular tensor interaction of the one-pion exchange potential, and the implications of this finding for the effective field theory program in nuclear physics are discussed.
Abstract: The renormalization of the chiral nuclear interactions is studied. In leading order, the cutoff dependence is related to the singular tensor interaction of the one-pion exchange potential. In S waves and in higher partial waves where the tensor force is repulsive this cutoff dependence can be absorbed by counterterms expected at that order. In the other partial waves additional contact interactions are necessary. The implications of this finding for the effective field theory program in nuclear physics are discussed.
308 citations
TL;DR: In this article, the chiral two-pion exchange component of the long-range π-pp interaction was studied in an energy-dependent partial-wave analysis and its presence and importance were demonstrated.
Abstract: The chiral two-pion exchange component of the long-range $\mathrm{pp}$ interaction is studied in an energy-dependent partial-wave analysis. We demonstrate its presence and importance and determine the chiral parameters ${c}_{i}$ ( $i\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1,3,4$). The values agree well with those obtained from pion-nucleon amplitudes.
125 citations
TL;DR: In this article, the chiral coupling constants c(1), c(3), and c(4) were determined from the partial-wave data and independently from the np data.
Abstract: As a first result of two new partial-wave analyses, one of the pp and another one of the np scattering data below 500 MeV, we report a study of the long-range chiral two-pion exchange interaction which contains the chiral coupling constants c(1), c(3), and c(4). By using as input a theoretical value for c(1) we are able to determine in pp as well as in np scattering accurate values for c(3) and c(4). The values determined from the pp data and independently from the np data are in very good agreement, indicating the correctness of the chiral two-pion exchange interaction. The weighted averages are c(3)=-4.78(10)/GeV and c(4)=3.96(22)/GeV, where the errors are statistical. The value of c(3) is best determined from the pp data and that of c(4) from the np data.
95 citations
TL;DR: In this article, the deuteron, triton, and helion EDMs of light nuclei in the framework of chiral effective field theory are presented and they can be written in terms of the leading six low energy constants encoding CP-violating physics EDMs.
Abstract: Recent calculations of EDMs of light nuclei in the framework of chiral effective field theory are presented We argue that they can be written in terms of the leading six low-energy constants encoding CP-violating physics EDMs of the deuteron, triton, and helion are explicitly given in order to corroborate our claim An eventual non-zero measurement of these EDMs can be used to disentangle the different sources and strengths of CP-violation
93 citations
TL;DR: In this article, the parity and time-reversal-violating operators involving quark and gluon fields that have effective dimension six were classified and the form of the effective interactions depends on the chiral properties of these operators.
89 citations
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TL;DR: In this paper, a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) is presented.
Abstract: Deposits of clastic carbonate-dominated (calciclastic) sedimentary slope systems in the rock record have been identified mostly as linearly-consistent carbonate apron deposits, even though most ancient clastic carbonate slope deposits fit the submarine fan systems better. Calciclastic submarine fans are consequently rarely described and are poorly understood. Subsequently, very little is known especially in mud-dominated calciclastic submarine fan systems. Presented in this study are a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) that reveals a >250 m thick calciturbidite complex deposited in a calciclastic submarine fan setting. Seven facies are recognised from core and thin section characterisation and are grouped into three carbonate turbidite sequences. They include: 1) Calciturbidites, comprising mostly of highto low-density, wavy-laminated bioclast-rich facies; 2) low-density densite mudstones which are characterised by planar laminated and unlaminated muddominated facies; and 3) Calcidebrites which are muddy or hyper-concentrated debrisflow deposits occurring as poorly-sorted, chaotic, mud-supported floatstones. These
9,929 citations
TL;DR: Wentzel and Jauch as discussed by the authors described the symmetrization of the energy momentum tensor according to the Belinfante Quantum Theory of Fields (BQF).
Abstract: To say that this is the best book on the quantum theory of fields is no praise, since to my knowledge it is the only book on this subject But it is a very good and most useful book The original was written in German and appeared in 1942 This is a translation with some minor changes A few remarks have been added, concerning meson theory and nuclear forces, also footnotes referring to modern work in this field, and finally an appendix on the symmetrization of the energy momentum tensor according to Belinfante Quantum Theory of Fields Prof Gregor Wentzel Translated from the German by Charlotte Houtermans and J M Jauch Pp ix + 224, (New York and London: Interscience Publishers, Inc, 1949) 36s
2,935 citations
TL;DR: In this article, the nuclear forces can be derived using effective chiral Lagrangians consistent with the symmetries of QCD, and the status of the calculations for two and three nucleon forces and their applications in few-nucleon systems are reviewed.
Abstract: Nuclear forces can be systematically derived using effective chiral Lagrangians consistent with the symmetries of QCD. I review the status of the calculations for two- and three-nucleon forces and their applications in few-nucleon systems. I also address issues like the quark mass dependence of the nuclear forces and resonance saturation for four-nucleon operators.
1,455 citations
TL;DR: In this article, the authors present a review of the application of atomic physics to address important challenges in physics and to look for variations in the fundamental constants, search for interactions beyond the standard model of particle physics and test the principles of general relativity.
Abstract: Advances in atomic physics, such as cooling and trapping of atoms and molecules and developments in frequency metrology, have added orders of magnitude to the precision of atom-based clocks and sensors. Applications extend beyond atomic physics and this article reviews using these new techniques to address important challenges in physics and to look for variations in the fundamental constants, search for interactions beyond the standard model of particle physics, and test the principles of general relativity.
1,077 citations
TL;DR: In this paper, the authors review the major progress achieved during the last decade in isospin physics with heavy ion reactions and discuss future challenges to the most important issues in this field.
940 citations