Light-cone distribution amplitudes of pseudoscalar mesons from lattice QCD
Abstract We present the first lattice determination of the two lowest Gegenbauer moments of the leading-twist pion and kaon light-cone distribution amplitudes with full control of all errors: a 2 π = 0.101 − 24 + 24 $$ {a}_2^{\pi }={0.101}_{-24}^{+24} $$ for the pion; a 1 K = 0.0533 − 35 + 34 $$ {a}...
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2019-08-01
|
| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP08(2019)065 |
| _version_ | 1818973573080940544 |
|---|---|
| author | Gunnar S. Bali Vladimir M. Braun Simon Bürger Meinulf Göckeler Michael Gruber Fabian Hutzler Piotr Korcyl Andreas Schäfer André Sternbeck Philipp Wein on behalf of the RQCD collaboration |
| author_facet | Gunnar S. Bali Vladimir M. Braun Simon Bürger Meinulf Göckeler Michael Gruber Fabian Hutzler Piotr Korcyl Andreas Schäfer André Sternbeck Philipp Wein on behalf of the RQCD collaboration |
| author_sort | Gunnar S. Bali |
| collection | DOAJ |
| description | Abstract We present the first lattice determination of the two lowest Gegenbauer moments of the leading-twist pion and kaon light-cone distribution amplitudes with full control of all errors: a 2 π = 0.101 − 24 + 24 $$ {a}_2^{\pi }={0.101}_{-24}^{+24} $$ for the pion; a 1 K = 0.0533 − 35 + 34 $$ {a}_1^K={0.0533}_{-35}^{+34} $$ and a 2 K = 0.090 − 20 + 19 $$ {a}_2^K={0.090}_{-20}^{+19} $$ for the kaon. The calculation is carried out on 35 different CLS ensembles with N f = 2 + 1 flavors of dynamical Wilson-clover fermions. These cover a multitude of pion and kaon mass combinations (including the physical point) and 5 different lattice spacings down to a = 0.039 fm. The momentum smearing technique and a new operator basis are employed to reduce statistical fluctuations and to improve the overlap with the ground states. The results are obtained from a combined chiral and continuum limit extrapolation that includes three separate trajectories in the quark mass plane. |
| first_indexed | 2024-12-20T15:26:18Z |
| format | Article |
| id | doaj.art-de6d73512e564e3c931c35e33fb0110d |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-20T15:26:18Z |
| publishDate | 2019-08-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-de6d73512e564e3c931c35e33fb0110d2022-12-21T19:35:50ZengSpringerOpenJournal of High Energy Physics1029-84792019-08-012019813510.1007/JHEP08(2019)065Light-cone distribution amplitudes of pseudoscalar mesons from lattice QCDGunnar S. Bali0Vladimir M. Braun1Simon Bürger2Meinulf Göckeler3Michael Gruber4Fabian Hutzler5Piotr Korcyl6Andreas Schäfer7André Sternbeck8Philipp Wein9on behalf of the RQCD collaborationInstitut für Theoretische Physik, Universität RegensburgInstitut für Theoretische Physik, Universität RegensburgInstitut für Theoretische Physik, Universität RegensburgInstitut für Theoretische Physik, Universität RegensburgInstitut für Theoretische Physik, Universität RegensburgInstitut für Theoretische Physik, Universität RegensburgMarian Smoluchowski Institute of Physics, Jagiellonian UniversityInstitut für Theoretische Physik, Universität RegensburgTheoretisch-Physikalisches Institut, Friedrich-Schiller-Universität JenaInstitut für Theoretische Physik, Universität RegensburgAbstract We present the first lattice determination of the two lowest Gegenbauer moments of the leading-twist pion and kaon light-cone distribution amplitudes with full control of all errors: a 2 π = 0.101 − 24 + 24 $$ {a}_2^{\pi }={0.101}_{-24}^{+24} $$ for the pion; a 1 K = 0.0533 − 35 + 34 $$ {a}_1^K={0.0533}_{-35}^{+34} $$ and a 2 K = 0.090 − 20 + 19 $$ {a}_2^K={0.090}_{-20}^{+19} $$ for the kaon. The calculation is carried out on 35 different CLS ensembles with N f = 2 + 1 flavors of dynamical Wilson-clover fermions. These cover a multitude of pion and kaon mass combinations (including the physical point) and 5 different lattice spacings down to a = 0.039 fm. The momentum smearing technique and a new operator basis are employed to reduce statistical fluctuations and to improve the overlap with the ground states. The results are obtained from a combined chiral and continuum limit extrapolation that includes three separate trajectories in the quark mass plane.http://link.springer.com/article/10.1007/JHEP08(2019)065Lattice QCDNonperturbative EffectsKaon Physics |
| spellingShingle | Gunnar S. Bali Vladimir M. Braun Simon Bürger Meinulf Göckeler Michael Gruber Fabian Hutzler Piotr Korcyl Andreas Schäfer André Sternbeck Philipp Wein on behalf of the RQCD collaboration Light-cone distribution amplitudes of pseudoscalar mesons from lattice QCD Journal of High Energy Physics Lattice QCD Nonperturbative Effects Kaon Physics |
| title | Light-cone distribution amplitudes of pseudoscalar mesons from lattice QCD |
| title_full | Light-cone distribution amplitudes of pseudoscalar mesons from lattice QCD |
| title_fullStr | Light-cone distribution amplitudes of pseudoscalar mesons from lattice QCD |
| title_full_unstemmed | Light-cone distribution amplitudes of pseudoscalar mesons from lattice QCD |
| title_short | Light-cone distribution amplitudes of pseudoscalar mesons from lattice QCD |
| title_sort | light cone distribution amplitudes of pseudoscalar mesons from lattice qcd |
| topic | Lattice QCD Nonperturbative Effects Kaon Physics |
| url | http://link.springer.com/article/10.1007/JHEP08(2019)065 |
| work_keys_str_mv | AT gunnarsbali lightconedistributionamplitudesofpseudoscalarmesonsfromlatticeqcd AT vladimirmbraun lightconedistributionamplitudesofpseudoscalarmesonsfromlatticeqcd AT simonburger lightconedistributionamplitudesofpseudoscalarmesonsfromlatticeqcd AT meinulfgockeler lightconedistributionamplitudesofpseudoscalarmesonsfromlatticeqcd AT michaelgruber lightconedistributionamplitudesofpseudoscalarmesonsfromlatticeqcd AT fabianhutzler lightconedistributionamplitudesofpseudoscalarmesonsfromlatticeqcd AT piotrkorcyl lightconedistributionamplitudesofpseudoscalarmesonsfromlatticeqcd AT andreasschafer lightconedistributionamplitudesofpseudoscalarmesonsfromlatticeqcd AT andresternbeck lightconedistributionamplitudesofpseudoscalarmesonsfromlatticeqcd AT philippwein lightconedistributionamplitudesofpseudoscalarmesonsfromlatticeqcd AT onbehalfoftherqcdcollaboration lightconedistributionamplitudesofpseudoscalarmesonsfromlatticeqcd |