Dr Chris Bouchard
- Senior Lecturer (Physics & Astronomy)
telephone:
0141 330 5285
email:
Chris.Bouchard@glasgow.ac.uk
Office 537, Kelvin Building, School of Physics & Astronomy, University of Glasgow, Glasgow, G12 8QQ
https://orcid.org/0000-0003-1639-7164Research interests
I apply the techniques of lattice field theory to study phenomenologically interesting processes in nuclear and particle physics.
Particle Physics: I study rare and semileptonic decays of mesons and neutral meson mixing. These studies increase the scrutiny with which we compare the Standard-Model-accommodation of quark flavor-changing interactions with Nature, and improve our chances of discovering new physics.
Nuclear Physics: I am interested in new techniques for calculating the nucleon matrix elements relevant to our understanding of the structure of the nucleon. Improved determinations of these matrix elements address a wide range of phenomenologically interesting problems, including the proton charge radius, direct searches for Dark Matter, and neutrino physics.
researcherID: N-3723-2016
Publications
2023
Parrott, W.G., Bouchard, C. and Davies, C.T.H. (2023) B → K and D → K form factors from fully relativistic lattice QCD. Physical Review D, 107(1), 014510. (doi: 10.1103/PhysRevD.107.014510)
Parrott, W.G., Bouchard, C. and Davies, C.T.H. (2023) Standard Model predictions for B → Kℓ+ℓ−, B → Kℓ−1ℓ+2 and B → Kv¯v using form factors from Nf = 2 + 1 + 1 lattice QCD. Physical Review D, 107(1), 014511. (doi: 10.1103/PhysRevD.107.014511)
2022
He, J. et al. (2022) Detailed analysis of excited-state systematics in a lattice QCD calculation of gA. Physical Review C, 105(6), 065203. (doi: 10.1103/PhysRevC.105.065203)
2021
Chakraborty, B., Parrott, W.G., Bouchard, C. , Davies, C.T.H. , Koponen, J. and Lepage, G.P. (2021) Improved Vcs determination using precise lattice QCD form factors for D → Kℓν. Physical Review D, 104(3), 034505. (doi: 10.1103/PhysRevD.104.034505)
Parrott, W.G., Bouchard, C. , Davies, C.T.H. and Hatton, D. (2021) Toward accurate form factors for B-to-light meson decay from lattice QCD. Physical Review D, 103(9), 094506. (doi: 10.1103/PhysRevD.103.094506)
Miller, N. et al. (2021) Scale setting the Möbius domain wall fermion on gradient-flowed HISQ action using the omega baryon mass and the gradient-flow scales t0 and w0. Physical Review D, 103(5), 054511. (doi: 10.1103/PhysRevD.103.054511)
2019
Bouchard, C. , Cao, L. and Owen, P. (2019) Summary of the 2018 CKM Working Group on Semileptonic and Leptonic b-Hadron Decays. In: 10th International Workshop on the CKM Unitarity Triangle (CKM 2018), Heidelberg, Germany, 17-21 Sep 2018, (doi: 10.5281/zenodo.2577805)
2018
Monahan, C. J., Bouchard, C. M. , Lepage, G. P., Na, H. and Shigemitsu, J. (2018) Form factor ratios for Bs→Kℓν and Bs→Dsℓν semileptonic decays and |Vub/Vcb|. Physical Review D, 98(11), 114509. (doi: 10.1103/PhysRevD.98.114509)
Chang, C. C. et al. (2018) A per-cent-level determination of the nucleon axial coupling from quantum chromodynamics. Nature, 558(7708), pp. 91-94. (doi: 10.1038/s41586-018-0161-8) (PMID:29849150)
Bazavov, A. et al. (2018) Short-distance matrix elements for D0-meson mixing from Nf=2+1 lattice QCD. Physical Review D, 97(3), 034513. (doi: 10.1103/PhysRevD.97.034513)
2017
Berkowitz, E. et al. (2017) Möbius domain-wall fermions on gradient-flowed dynamical HISQ ensembles. Physical Review D, 96(5), 054513. (doi: 10.1103/PhysRevD.96.054513)
Bouchard, C. , Chang, C. C., Kurth, T., Orginos, K. and Walker-Loud, A. (2017) On the Feynman-Hellmann theorem in quantum field theory and the calculation of matrix elements. Physical Review D, 96(1), 014504. (doi: 10.1103/PhysRevD.96.014504)
Monahan, C. J., Na, H., Bouchard, C. M. , Lepage, G. P. and Shigemitsu, J. (2017) Bs → Ds l ν Form Factors and the Fragmentation Fraction Ratio fs / fd. Physical Review D, 95(11), 114506. (doi: 10.1103/PhysRevD.95.114506)
2016
Bazavov, A. et al. (2016) B(s)0-mixing matrix elements from lattice QCD for the Standard Model and beyond. Physical Review D, 93(11), 113016. (doi: 10.1103/PhysRevD.93.113016)
Bailey, J. A. et al. (2016) B→Kl+l−decay form factors from three-flavor lattice QCD. Physical Review D, 93(2), 025026. (doi: 10.1103/PhysRevD.93.025026)
Chang, C. C., Bouchard, C. , Orginos, K. and Richards, D. (2016) Matrix Elements From Moments of Correlation Functions. In: 34th Annual International Symposium on Lattice Field Theory, Southampton, UK, 24-30 Jul 2016,
2015
Bailey, J. A. et al. (2015) B → πll form factors for new physics searches from lattice QCD. Physical Review Letters, 115(15), 152002. (doi: 10.1103/PhysRevLett.115.152002) (PMID:26550717)
Na, H., Bouchard, C. M. , Lepage, G. P., Monahan, C. and Shigemitsu, J. (2015) B→Dlν form factors at nonzero recoil and extraction of |Vcb|. Physical Review D, 92(5), 054510. (doi: 10.1103/PhysRevD.92.054510)
Bailey, J. A. et al. (2015) B→Dℓν form factors at nonzero recoil and |Vcb| from 2+1-flavor lattice QCD. Physical Review D, 92(3), 034506. (doi: 10.1103/PhysRevD.92.034506)
Bailey, J. A. et al. (2015) |Vub| from B→πℓν decays and (2+1)-flavor lattice QCD. Physical Review D, 92(1), 014024. (doi: 10.1103/PhysRevD.92.014024)
Bouchard, C.M. (2015) Testing the Standard Model Under the Weight of Heavy Flavors. The 32nd International Symposium on Lattice Field Theory, New York, NY, USA, 23-28 Jun 2014.
2014
Bazavov, A. et al. (2014) Charmed and light pseudoscalar meson decay constants from four-flavor lattice QCD with physical light quarks. Physical Review D, 90(7), 074509. (doi: 10.1103/PhysRevD.90.074509)
Bouchard, C.M. , Lepage, G. P., Monahan, C., Na, H. and Shigemitsu, J. (2014) Bs→Kℓν form factors from lattice QCD. Physical Review D, 90(5), 054506. (doi: 10.1103/PhysRevD.90.054506)
Bailey, J. A. et al. (2014) Update of |Vcb| from the B¯→D*ℓν¯ form factor at zero recoil with three-flavor lattice QCD. Physical Review D, 89(11), 114504. (doi: 10.1103/PhysRevD.89.114504)
Bouchard, C. , Lepage, G. P., Monahan, C., Na, H. and Shigemitsu, J. (2014) Erratum: Standard model predictions for B→Kℓ+ℓ−with form factors from Lattice QCD [Phys. Rev. Lett. 111, 162002 (2013)]. Physical Review Letters, 112(14), 149902. (doi: 10.1103/PhysRevLett.112.149902)
Bazavov, A. et al. (2014) Determination of |Vus| from a lattice QCD calculation of theK→π ℓ ν semileptonic form factor with physical quark masses. Physical Review Letters, 112(11), 112001. (doi: 10.1103/PhysRevLett.112.112001) (PMID:24702353)
2013
Bouchard, C. , Lepage, G. P., Monahan, C., Na, H. and Shigemitsu, J. (2013) Standard model predictions for B→Kℓ+ℓ−with form factors from lattice QCD. Physical Review Letters, 111(16), (doi: 10.1103/PhysRevLett.111.162002)
Bouchard, C. , Lepage, G. P., Monahan, C., Na, H. and Shigemitsu, J. (2013) Erratum: Rare decay B→Kℓ+ℓ−form factors from lattice QCD. Physical Review D, 88(7), 079901. (doi: 10.1103/PhysRevD.88.079901)
Bouchard, C. , Lepage, G. P., Monahan, C., Na, H. and Shigemitsu, J. (2013) Rare decayB→Kℓ+ℓ−form factors from lattice QCD. Physical Review D, 88(5), 054509. (doi: 10.1103/PhysRevD.88.054509)
Bazavov, A. et al. (2013) Kaon semileptonic vector form factor and determination of |Vus| using staggered fermions. Physical Review D, 87(7), 073012. (doi: 10.1103/PhysRevD.87.073012)
Bouchard, C.M. (2013) Flavor Physics and Lattice QCD. In: Meeting of the American Physical Society - Division of Particles and Fields, Santa Cruz, CA, USA, 13-17 Aug 2013,
Bouchard, C.M. , Fermilab Lattice Collaboration, and MILC Collaboration, (2013) Hadronic matrix elements for B-mixing in the standard model and beyond. AIP Conference Proceedings, 1560, pp. 375-377. (doi: 10.1063/1.4826796)
2012
Bailey, J. A. et al. (2012) Refining new-physics searches in B→Dτν with lattice QCD. Physical Review Letters, 109(7), 071802. (doi: 10.1103/PhysRevLett.109.071802)
Bazavov, A. et al. (2012) Neutral B-meson mixing from three-flavor lattice quantum chromodynamics: Determination of the SU (3)-breaking ratio ξ. Physical Review D, 86(3), 034503. (doi: 10.1103/PhysRevD.86.034503)
Bailey, J. A. et al. (2012) Erratum:Bs→Ds/B→Dsemileptonic form-factor ratios and their application toBR(Bs0→μ+μ−)[Phys. Rev. D85, 114502 (2012)]. Physical Review D, 86(3), 039904. (doi: 10.1103/PhysRevD.86.039904)
Bazavov, A. et al. (2012) B- and D-meson decay constants from three-flavor lattice QCD. Physical Review D, 85(11), 114506. (doi: 10.1103/PhysRevD.85.114506)
Bailey, J. A. et al. (2012) Bs→Ds/B→D semileptonic form-factor ratios and their application to BR(Bs0→μ+μ−). Physical Review D, 85(11), 114502. (doi: 10.1103/PhysRevD.85.114502)
Bernard, C., Bouchard, C.M. , El-Khadra, A.X., Freeland, E.D., Gámiz, E., Kronfeld, A.S., Laiho, J., Van de Water, R.S., Fermilab Lattice Collaboration, and MILC Collaboration, (2012) B-mixing in the standard model and beyond: Lattice QCD. AIP Conference Proceedings, 1441, pp. 672-674. (doi: 10.1063/1.3700648)
Articles
Parrott, W.G., Bouchard, C. and Davies, C.T.H. (2023) B → K and D → K form factors from fully relativistic lattice QCD. Physical Review D, 107(1), 014510. (doi: 10.1103/PhysRevD.107.014510)
Parrott, W.G., Bouchard, C. and Davies, C.T.H. (2023) Standard Model predictions for B → Kℓ+ℓ−, B → Kℓ−1ℓ+2 and B → Kv¯v using form factors from Nf = 2 + 1 + 1 lattice QCD. Physical Review D, 107(1), 014511. (doi: 10.1103/PhysRevD.107.014511)
He, J. et al. (2022) Detailed analysis of excited-state systematics in a lattice QCD calculation of gA. Physical Review C, 105(6), 065203. (doi: 10.1103/PhysRevC.105.065203)
Chakraborty, B., Parrott, W.G., Bouchard, C. , Davies, C.T.H. , Koponen, J. and Lepage, G.P. (2021) Improved Vcs determination using precise lattice QCD form factors for D → Kℓν. Physical Review D, 104(3), 034505. (doi: 10.1103/PhysRevD.104.034505)
Parrott, W.G., Bouchard, C. , Davies, C.T.H. and Hatton, D. (2021) Toward accurate form factors for B-to-light meson decay from lattice QCD. Physical Review D, 103(9), 094506. (doi: 10.1103/PhysRevD.103.094506)
Miller, N. et al. (2021) Scale setting the Möbius domain wall fermion on gradient-flowed HISQ action using the omega baryon mass and the gradient-flow scales t0 and w0. Physical Review D, 103(5), 054511. (doi: 10.1103/PhysRevD.103.054511)
Monahan, C. J., Bouchard, C. M. , Lepage, G. P., Na, H. and Shigemitsu, J. (2018) Form factor ratios for Bs→Kℓν and Bs→Dsℓν semileptonic decays and |Vub/Vcb|. Physical Review D, 98(11), 114509. (doi: 10.1103/PhysRevD.98.114509)
Chang, C. C. et al. (2018) A per-cent-level determination of the nucleon axial coupling from quantum chromodynamics. Nature, 558(7708), pp. 91-94. (doi: 10.1038/s41586-018-0161-8) (PMID:29849150)
Bazavov, A. et al. (2018) Short-distance matrix elements for D0-meson mixing from Nf=2+1 lattice QCD. Physical Review D, 97(3), 034513. (doi: 10.1103/PhysRevD.97.034513)
Berkowitz, E. et al. (2017) Möbius domain-wall fermions on gradient-flowed dynamical HISQ ensembles. Physical Review D, 96(5), 054513. (doi: 10.1103/PhysRevD.96.054513)
Bouchard, C. , Chang, C. C., Kurth, T., Orginos, K. and Walker-Loud, A. (2017) On the Feynman-Hellmann theorem in quantum field theory and the calculation of matrix elements. Physical Review D, 96(1), 014504. (doi: 10.1103/PhysRevD.96.014504)
Monahan, C. J., Na, H., Bouchard, C. M. , Lepage, G. P. and Shigemitsu, J. (2017) Bs → Ds l ν Form Factors and the Fragmentation Fraction Ratio fs / fd. Physical Review D, 95(11), 114506. (doi: 10.1103/PhysRevD.95.114506)
Bazavov, A. et al. (2016) B(s)0-mixing matrix elements from lattice QCD for the Standard Model and beyond. Physical Review D, 93(11), 113016. (doi: 10.1103/PhysRevD.93.113016)
Bailey, J. A. et al. (2016) B→Kl+l−decay form factors from three-flavor lattice QCD. Physical Review D, 93(2), 025026. (doi: 10.1103/PhysRevD.93.025026)
Bailey, J. A. et al. (2015) B → πll form factors for new physics searches from lattice QCD. Physical Review Letters, 115(15), 152002. (doi: 10.1103/PhysRevLett.115.152002) (PMID:26550717)
Na, H., Bouchard, C. M. , Lepage, G. P., Monahan, C. and Shigemitsu, J. (2015) B→Dlν form factors at nonzero recoil and extraction of |Vcb|. Physical Review D, 92(5), 054510. (doi: 10.1103/PhysRevD.92.054510)
Bailey, J. A. et al. (2015) B→Dℓν form factors at nonzero recoil and |Vcb| from 2+1-flavor lattice QCD. Physical Review D, 92(3), 034506. (doi: 10.1103/PhysRevD.92.034506)
Bailey, J. A. et al. (2015) |Vub| from B→πℓν decays and (2+1)-flavor lattice QCD. Physical Review D, 92(1), 014024. (doi: 10.1103/PhysRevD.92.014024)
Bazavov, A. et al. (2014) Charmed and light pseudoscalar meson decay constants from four-flavor lattice QCD with physical light quarks. Physical Review D, 90(7), 074509. (doi: 10.1103/PhysRevD.90.074509)
Bouchard, C.M. , Lepage, G. P., Monahan, C., Na, H. and Shigemitsu, J. (2014) Bs→Kℓν form factors from lattice QCD. Physical Review D, 90(5), 054506. (doi: 10.1103/PhysRevD.90.054506)
Bailey, J. A. et al. (2014) Update of |Vcb| from the B¯→D*ℓν¯ form factor at zero recoil with three-flavor lattice QCD. Physical Review D, 89(11), 114504. (doi: 10.1103/PhysRevD.89.114504)
Bouchard, C. , Lepage, G. P., Monahan, C., Na, H. and Shigemitsu, J. (2014) Erratum: Standard model predictions for B→Kℓ+ℓ−with form factors from Lattice QCD [Phys. Rev. Lett. 111, 162002 (2013)]. Physical Review Letters, 112(14), 149902. (doi: 10.1103/PhysRevLett.112.149902)
Bazavov, A. et al. (2014) Determination of |Vus| from a lattice QCD calculation of theK→π ℓ ν semileptonic form factor with physical quark masses. Physical Review Letters, 112(11), 112001. (doi: 10.1103/PhysRevLett.112.112001) (PMID:24702353)
Bouchard, C. , Lepage, G. P., Monahan, C., Na, H. and Shigemitsu, J. (2013) Standard model predictions for B→Kℓ+ℓ−with form factors from lattice QCD. Physical Review Letters, 111(16), (doi: 10.1103/PhysRevLett.111.162002)
Bouchard, C. , Lepage, G. P., Monahan, C., Na, H. and Shigemitsu, J. (2013) Erratum: Rare decay B→Kℓ+ℓ−form factors from lattice QCD. Physical Review D, 88(7), 079901. (doi: 10.1103/PhysRevD.88.079901)
Bouchard, C. , Lepage, G. P., Monahan, C., Na, H. and Shigemitsu, J. (2013) Rare decayB→Kℓ+ℓ−form factors from lattice QCD. Physical Review D, 88(5), 054509. (doi: 10.1103/PhysRevD.88.054509)
Bazavov, A. et al. (2013) Kaon semileptonic vector form factor and determination of |Vus| using staggered fermions. Physical Review D, 87(7), 073012. (doi: 10.1103/PhysRevD.87.073012)
Bouchard, C.M. , Fermilab Lattice Collaboration, and MILC Collaboration, (2013) Hadronic matrix elements for B-mixing in the standard model and beyond. AIP Conference Proceedings, 1560, pp. 375-377. (doi: 10.1063/1.4826796)
Bailey, J. A. et al. (2012) Refining new-physics searches in B→Dτν with lattice QCD. Physical Review Letters, 109(7), 071802. (doi: 10.1103/PhysRevLett.109.071802)
Bazavov, A. et al. (2012) Neutral B-meson mixing from three-flavor lattice quantum chromodynamics: Determination of the SU (3)-breaking ratio ξ. Physical Review D, 86(3), 034503. (doi: 10.1103/PhysRevD.86.034503)
Bailey, J. A. et al. (2012) Erratum:Bs→Ds/B→Dsemileptonic form-factor ratios and their application toBR(Bs0→μ+μ−)[Phys. Rev. D85, 114502 (2012)]. Physical Review D, 86(3), 039904. (doi: 10.1103/PhysRevD.86.039904)
Bazavov, A. et al. (2012) B- and D-meson decay constants from three-flavor lattice QCD. Physical Review D, 85(11), 114506. (doi: 10.1103/PhysRevD.85.114506)
Bailey, J. A. et al. (2012) Bs→Ds/B→D semileptonic form-factor ratios and their application to BR(Bs0→μ+μ−). Physical Review D, 85(11), 114502. (doi: 10.1103/PhysRevD.85.114502)
Bernard, C., Bouchard, C.M. , El-Khadra, A.X., Freeland, E.D., Gámiz, E., Kronfeld, A.S., Laiho, J., Van de Water, R.S., Fermilab Lattice Collaboration, and MILC Collaboration, (2012) B-mixing in the standard model and beyond: Lattice QCD. AIP Conference Proceedings, 1441, pp. 672-674. (doi: 10.1063/1.3700648)
Conference or Workshop Item
Bouchard, C.M. (2015) Testing the Standard Model Under the Weight of Heavy Flavors. The 32nd International Symposium on Lattice Field Theory, New York, NY, USA, 23-28 Jun 2014.
Conference Proceedings
Bouchard, C. , Cao, L. and Owen, P. (2019) Summary of the 2018 CKM Working Group on Semileptonic and Leptonic b-Hadron Decays. In: 10th International Workshop on the CKM Unitarity Triangle (CKM 2018), Heidelberg, Germany, 17-21 Sep 2018, (doi: 10.5281/zenodo.2577805)
Chang, C. C., Bouchard, C. , Orginos, K. and Richards, D. (2016) Matrix Elements From Moments of Correlation Functions. In: 34th Annual International Symposium on Lattice Field Theory, Southampton, UK, 24-30 Jul 2016,
Bouchard, C.M. (2013) Flavor Physics and Lattice QCD. In: Meeting of the American Physical Society - Division of Particles and Fields, Santa Cruz, CA, USA, 13-17 Aug 2013,
