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| 001 | 910663 | ||
| 005 | 20230310131349.0 | ||
| 024 | 7 | _ | |a 10.1007/JHEP02(2022)001 |2 doi |
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| 037 | _ | _ | |a FZJ-2022-04036 |
| 082 | _ | _ | |a 530 |
| 100 | 1 | _ | |a Elhatisari, Serdar |0 P:(DE-HGF)0 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Alpha-alpha scattering in the Multiverse |
| 260 | _ | _ | |a [Trieste] |c 2022 |b SISSA |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 500 | _ | _ | |a We gratefully acknowledge funding by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) and the NSFC through the funds provided to the Sino-German Collaborative Research Center TRR110 “Symmetries and the Emergence of Structure in QCD” (DFG Project ID 196253076 - TRR 110, NSFC Grant No. 12070131001), the Chinese Academy of Sciences (CAS) President’s International Fellowship Initiative (PIFI) (Grant No. 2018DM0034), Volkswagen Stiftung (Grant No. 93562), the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No. 101018170), the U.S. Department of Energy (DE-SC0013365 and DE-SC0021152) and the Nuclear Computational Low-Energy Initiative (NUCLEI) SciDAC-4 project (DE-SC0018083) and the Scientific and Technological Research Council of Turkey (TUBITAK project no. 120F341) |
| 520 | _ | _ | |a We investigate the phase shifts of low-energy alpha-alpha scattering under variations of the fundamental parameters of the Standard Model, namely the light quark mass, the electromagnetic fine-structure constant as well as the QCD theta-angle. As a first step, we recalculate alpha-alpha scattering in our Universe utilizing various improvements in the adiabatic projection method, which leads to an improved, parameter-free prediction of the S- and D-wave phase shifts for laboratory energies below 10 MeV. We find that positive shifts in the pion mass have a small effect on the S-wave phase shift, whereas lowering the pion mass adds some repulsion in the two-alpha system. The effect on the D-wave phase shift turns out to be more pronounced as signaled by the D-wave resonance parameters. Variations of the fine-structure constant have almost no effect on the low-energy alpha-alpha phase shifts. We further show that up-to-and-including next-to-leading order in the chiral expansion, variations of these phase shifts with respect to the QCD theta-angle can be expressed in terms of the theta-dependent pion mass. |
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| 700 | 1 | _ | |a Lähde, Timo A. |0 P:(DE-Juel1)145995 |b 1 |u fzj |
| 700 | 1 | _ | |a Lee, Dean |0 P:(DE-HGF)0 |b 2 |
| 700 | 1 | _ | |a Meißner, Ulf-G. |0 P:(DE-Juel1)131252 |b 3 |
| 700 | 1 | _ | |a Vonk, Thomas |0 P:(DE-HGF)0 |b 4 |
| 773 | _ | _ | |a 10.1007/JHEP02(2022)001 |g Vol. 2022, no. 2, p. 1 |0 PERI:(DE-600)2027350-2 |n 2 |p 1 |t Journal of high energy physics |v 2022 |y 2022 |x 1029-8479 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/910663/files/JHEP02%282022%29001.pdf |y OpenAccess |
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