Electromagnetic processes in a χEFT framework

S. Pastore; R. Schiavilla; M. Viviani

doi:10.1088/1674-1137/34/9/044

Chinese Physics C> 2010, Vol. 34> Issue(9) : 1368-1371 DOI: 10.1088/1674-1137/34/9/044

Electromagnetic processes in a χEFT framework

Abstract
HTML
Reference
Related

PDF

Abstract：
Recently, we have derived a two--nucleon potential and consistent nuclear electromagnetic currents in chiral effective field theory with pions and nucleons as explicit degrees of freedom. The calculation of the currents has been carried out to include N³LO corrections, consisting of two--pion exchange and contact contributions. The latter involve unknown low-energy constants (LECs), some of which have been fixed by fitting the np S- and P-wave phase shifts up to 100 MeV lab energies. The remaining LECs entering the current operator are determined so as to reproduce the experimental deuteron and trinucleon magnetic moments, as well as the np cross section. This electromagnetic current operator is utilized to study the nd and n³He radiative captures at thermal neutron energies. Here we discuss our results stressing on the important role played by the LECs in reproducing the experimental data.

References

[1]

. Weinberg S. The Quantum Theory of Fields, vol. II. Cambridge:Cambridge University Press, 19952. Weinberg S. Phys. Lett. B, 1990, 251: 288; Nucl. Phys. B,1991, 363: 3; Phys. Lett. B, 1992, 295: 1143. van Kolck U. Prog. Part. Nucl. Phys., 1999, 43: 337; Bedaque P, van Kolck U. Ann. Rev. Nucl. Part. Sci., 2002,52: 339; Epelbaum E. Prog. Part. Nucl. Phys., 2006, 57:654; Epelbaum E, Hammer H W, Meissner U G. Rev. Mod.Phys., 2008, in press: arXiv:0811.13384. Park T S, Min D P, Rho M. Phys. Rep., 1993, 233: 3415. Park T S, Min D P, Rho M. Nucl. Phys. A, 1996, 596: 5156. Pastore S, Schiavilla R, Goity J L. Phys. Rev. C, 2008, 78:0640027. Pastore S, Girlanda L, Schiavilla R, Viviani M, Wiringa RB. Phys. Rev. C, 2009, 80: 0340048. van Kolck U. Phys. Rev. C, 1994, 49: 2932; Ordonez C,Ray L, van Kolck U. Phys. Rev. C, 1996, 53: 20869. Epelbaum E, Glockle W, Meissner U G. Nucl. Phys. A,1998, 637: 107; Nucl. Phys. A, 2005, 747: 36210. Klling S, Epelbaum E, Krebs H, Meissner U G. Phys. Rev.C, 2009, 80: 04550211. Wiringa R B, Stoks V G J, Schiavilla R. Phys. Rev. C,1995, 51: 3812. Pudliner B S, Pandharipande V R, Carlson J, Pieper S C,Wiringa R B. Phys. Rev. C, 1997, 56: 172013. Entem D R, Machleidt R. Phys. Rev. C, 2003, 68: 04100114. Gazit D, Quaglioni S, Navratil P. Phys. Rev. Lett., 2009,103: 10250215. Jurney E T, Bendt P J, Browne J C. Phys. Rev. C, 1982,25: 2810; Konijnenberg M W et al. Phys. Lett. B, 1988,205: 21516. Wolfs F L H, Freedman S J, Nelson J E, Dewey MS, GreeneG L. Phys. Rev. Lett., 1989, 63: 2721; Wervelman R, AbrahamsK, Postma H, Booten J G L, Van Hees A G M. Nucl.Phys. A, 1991, 526: 26517. Carlson J, Schiavilla R. Rev. Mod. Phys. 1998, 70: 743

[1]	Cen Zhang . Constraining qqtt operators from four-top production: a case for enhanced EFT sensitivity. Chinese Physics C, 2018, 42(2): 023104. doi: 10.1088/1674-1137/42/2/023104
[2]	Xing-Xing Dong , Shu-Min Zhao , Xi-Jie Zhan , Zhong-Jun Yang , Hai-Bin Zhang , Tai-Fu Feng . Z→l_i^±l_j^干 processes in the BLMSSM. Chinese Physics C, 2017, 41(7): 073103. doi: 10.1088/1674-1137/41/7/073103
[3]	Xin Xia , Teng Li , Xing-Tao Huang , Xue-Yao Zhang . Application of SNiPER framework to BESIII physics analysis. Chinese Physics C, 2017, 41(5): 056202. doi: 10.1088/1674-1137/41/5/056202
[4]	Hui Jia , Bin Qi , Shou-Yu Wang , Shuo Wang , Chen Liu . Electromagnetic transitions in multiple chiral doublet bands. Chinese Physics C, 2016, 40(12): 124103. doi: 10.1088/1674-1137/40/12/124103
[5]	J. N. Pandya , N. R. Soni , N. Devlani , A. K. Rai . Decay rates and electromagnetic transitions of heavy quarkonia. Chinese Physics C, 2015, 39(12): 123101. doi: 10.1088/1674-1137/39/12/123101
[6]	XU Meng-Xin , HE Yuan , WANG Feng-Feng , ZHANG Sheng-Hu , HUANG Shi-Chun , HUANG Yu-Lu , ZHAO Hong-Wei , XIA Jia-Wen . Electromagnetic characteristics of the CH cavity. Chinese Physics C, 2015, 39(2): 027005. doi: 10.1088/1674-1137/39/2/027005
[7]	WANG Pei , ZUO Wei . Effect of tensor force on the density dependence of symmetryenergy within the BHF framework. Chinese Physics C, 2015, 39(1): 014101. doi: 10.1088/1674-1137/39/1/014101
[8]	LI Cheng-Bo , WEN Qun-Gang , ZHOU Shu-Hua , JIANG Zong-Jun , FU Yuan-Yong , ZHOU Jing , MENG Qiu-Ying , WANG Xiao-Lian . Experimental spectra analysis in THM with the help of simulation based on the Geant4 framework. Chinese Physics C, 2015, 39(5): 054001. doi: 10.1088/1674-1137/39/5/054001
[9]	WANG Pei-Long , ZHANG Yun-Long , WANG Xiao-Lian , XU Zi-Zong . Magnetic shielding for DAMPE electromagnetic calorimeter PMTs. Chinese Physics C, 2014, 38(8): 086002. doi: 10.1088/1674-1137/38/8/086002
[10]	Kaushal Thakkar , Ajay Majethiya . Electromagnetic transition properties of Δ→Nγ in a hypercentral scheme. Chinese Physics C, 2012, 36(5): 385-389. doi: 10.1088/1674-1137/36/5/001
[11]	HU Ji-Feng , ZHENG Yang-Heng , SUN Xiao-Dong , JI Xiao-Bin . A data quality monitoring software framework for the BESⅢ experiment. Chinese Physics C, 2012, 36(1): 62-66. doi: 10.1088/1674-1137/36/1/010
[12]	H. Nakazawa . Two-photon processes at Belle. Chinese Physics C, 2010, 34(6): 801-806. doi: 10.1088/1674-1137/34/6/031
[13]	V. L. Chernyak . Exclusive γ^(*)γ processes. Chinese Physics C, 2010, 34(6): 822-830. doi: 10.1088/1674-1137/34/6/034
[14]	D. Rozpedzik , J. Golak . Low energy electromagnetic processes based on the chiral effective field theory approach. Chinese Physics C, 2010, 34(9): 1393-1395. doi: 10.1088/1674-1137/34/9/051
[15]	LI Hai-Bo , YANG Mao-Zhi . About detecting CP-violating processes in J/ψ→K⁰K⁰ decay. Chinese Physics C, 2009, 33(2): 85-88. doi: 10.1088/1674-1137/33/2/001
[16]	I. Jaeglé (for the CBELSA/TAPS collaboration) . Photoproduction of mesons off the deuteron: quasifree and coherent processes. Chinese Physics C, 2009, 33(12): 1340-1344. doi: 10.1088/1674-1137/33/12/050
[17]	Qixing Shen , Hong Yu . Spin and Parity Analysis for the Three-Step Two-Body Hadronic Decay Processes of J/ψ. Chinese Physics C, 1992, 16(S1): 41-50.
[18]	Yu Hong , Shen Qixing . A Moment Analysis for the J/ψ Hadronic Decay Processes. Chinese Physics C, 1990, 14(S4): 353-360.
[19]	Yu Hong , Shen Qixin . Helicity Formalism of the Angular Distribution for the J/ψ Hadronic Decay Processes. Chinese Physics C, 1990, 14(S3): 259-263.
[20]	Xing Zheng , Chen Zingqu . Rotational Effect on Electromagnetic Transitions in Nuclei. Chinese Physics C, 1989, 13(S2): 213-219.

Access

Get Citation

S. Pastore, R. Schiavilla and M. Viviani. Electromagnetic processes in a χEFT framework[J]. Chinese Physics C, 2010, 34(9): 1368-1371. doi: 10.1088/1674-1137/34/9/044

S. Pastore, R. Schiavilla and M. Viviani. Electromagnetic processes in a χEFT framework[J]. Chinese Physics C, 2010, 34(9): 1368-1371. doi: 10.1088/1674-1137/34/9/044 shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2010-02-09
Revised: 1900-01-01

Article Metric

Article Views(2379)
PDF Downloads(365)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Electromagnetic processes in a χEFT framework

Received Date: 2010-02-09

Accepted Date: 1900-01-01

Available Online: 2010-09-05

Abstract:

Recently, we have derived a two--nucleon potential and consistent nuclear electromagnetic currents in chiral effective field theory with pions and nucleons as explicit degrees of freedom. The calculation of the currents has been carried out to include N³LO corrections, consisting of two--pion exchange and contact contributions. The latter involve unknown low-energy constants (LECs), some of which have been fixed by fitting the np S- and P-wave phase shifts up to 100 MeV lab energies. The remaining LECs entering the current operator are determined so as to reproduce the experimental deuteron and trinucleon magnetic moments, as well as the np cross section. This electromagnetic current operator is utilized to study the nd and n³He radiative captures at thermal neutron energies. Here we discuss our results stressing on the important role played by the LECs in reproducing the experimental data.

HTML

Reference (1)

Electromagnetic processes in a χEFT framework

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article

Electromagnetic processes in a χEFT framework

HTML

目录