Improved measurement of the form factors in the decay Λc+→ Λe+νe

J. W. Hinson; G. S. Huang; J. Lee; D. H. Miller; V. Pavlunin; R. Rangarajan; B. Sanghi; E. I. Shibata; I. P.J. Shipsey; D. Cronin-Hennessy; C. S. Park; W. Park; J. B. Thayer; E. H. Thorndike; T. E. Coan; Y. S. Gao; F. Liu; R. Stroynowski; M. Artuso; C. Boulahouache; S. Blusk; E. Dambasuren; O. Dorjkhaidav; R. Mountain; H. Muramatsu; R. Nandakumar; T. Skwarnicki; S. Stone; J. C. Wang; S. E. Csorna; I. Danko; G. Bonvicini; D. Cinabro; M. Dubrovin; S. McGee; A. Bornheim; E. Lipeles; S. P. Pappas; A. Shapiro; W. M. Sun; A. J. Weinstein; R. A. Briere; G. P. Chen; T. Ferguson; G. Tatishvili; H. Vogel; M. E. Watkins; N. E. Adam; J. P. Alexander; K. Berkelman; V. Boisvert; D. G. Cassel; J. E. Duboscq; K. M. Ecklund; R. Ehrlich; R. S. Galik; L. Gibbons; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; L. Hsu; C. D. Jones; J. Kandaswamy; D. L. Kreinick; A. Magerkurth; H. Mahlke-Krüger; T. O. Meyer; N. B. Mistry; J. R. Patterson; D. Peterson; J. Pivarski; S. J. Richichi; D. Riley; A. J. Sadoff; H. Schwarthoff; M. R. Shepherd; J. G. Thayer; D. Urner; T. Wilksen; A. Warburton; M. Weinberger; S. B. Athar; P. Avery; L. Breva-Newell; V. Potlia; H. Stoeck; J. Yelton; K. Benslama; C. Cawlfield; B. I. Eisenstein; G. D. Gollin; I. Karliner; N. Lowrey; C. Plager; C. Sedlack; M. Selen; J. J. Thaler; J. Williams; K. W. Edwards; D. Besson; S. Anderson; V. V. Frolov; D. T. Gong; Y. Kubota; S. Z. Li; R. Poling; A. Smith; C. J. Stepaniak; J. Urheim; Z. Metreveli; K. K. Seth; A. Tomaradze; P. Zweber; S. Ahmed; M. S. Alam; J. Ernst; L. Jian; M. Saleem; F. Wappler; K. Arms; E. Eckhart; K. K. Gan; C. Gwon; K. Honscheid; H. Kagan; R. Kass; T. K. Pedlar; E. von Toerne; H. Severini; P. Skubic; S. A. Dytman; J. A. Mueller; S. Nam; V. Savinov

doi:10.1103/PhysRevLett.94.191801

Improved measurement of the form factors in the decay Λc+→ Λe+νe

J. W. Hinson, G. S. Huang, J. Lee, D. H. Miller, V. Pavlunin, R. Rangarajan, B. Sanghi, E. I. Shibata, I. P.J. Shipsey, D. Cronin-Hennessy, C. S. Park, W. Park, J. B. Thayer, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, R. Stroynowski, M. Artuso, C. BoulahouacheS. Blusk, E. Dambasuren, O. Dorjkhaidav, R. Mountain, H. Muramatsu, R. Nandakumar, T. Skwarnicki, S. Stone, J. C. Wang, S. E. Csorna, I. Danko, G. Bonvicini, D. Cinabro, M. Dubrovin, S. McGee, A. Bornheim, E. Lipeles, S. P. Pappas, A. Shapiro, W. M. Sun, A. J. Weinstein, R. A. Briere, G. P. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, N. E. Adam, J. P. Alexander, K. Berkelman, V. Boisvert, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, R. S. Galik, L. Gibbons, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, L. Hsu, C. D. Jones, J. Kandaswamy, D. L. Kreinick, A. Magerkurth, H. Mahlke-Krüger, T. O. Meyer, N. B. Mistry, J. R. Patterson, D. Peterson, J. Pivarski, S. J. Richichi, D. Riley, A. J. Sadoff, H. Schwarthoff, M. R. Shepherd, J. G. Thayer, D. Urner, T. Wilksen, A. Warburton, M. Weinberger, S. B. Athar, P. Avery, L. Breva-Newell, V. Potlia, H. Stoeck, J. Yelton, K. Benslama, C. Cawlfield, B. I. Eisenstein, G. D. Gollin, I. Karliner, N. Lowrey, C. Plager, C. Sedlack, M. Selen, J. J. Thaler, J. Williams, K. W. Edwards, D. Besson, S. Anderson, V. V. Frolov, D. T. Gong, Y. Kubota, S. Z. Li, R. Poling, A. Smith, C. J. Stepaniak, J. Urheim, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, S. Ahmed, M. S. Alam, J. Ernst, L. Jian, M. Saleem, F. Wappler, K. Arms, E. Eckhart, K. K. Gan, C. Gwon, K. Honscheid, H. Kagan, R. Kass, T. K. Pedlar, E. von Toerne, H. Severini, P. Skubic, S. A. Dytman, J. A. Mueller, S. Nam, V. Savinov

Department of Physics

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

Using the CLEO detector at the Cornell Electron Storage Ring, we have studied the distribution of kinematic variables in the decay Λc+→Λe+νe. By performing a four-dimensional maximum likelihood fit, we determine the form factor ratio, R=f2/f1=-0.31±0. 05(stat)±0.04(syst), the pole mass, Mpole=[2.21±0.08(stat) ±0.14(syst)]GeV/c2, and the decay asymmetry parameter of the Λc+, αΛc=-0.86±0.03(stat)±0.02(syst), forq2=0.67 (GeV/c2)2. We compare the angular distributions of the Λc+ and Λ̄c- and find no evidence for CP violation: AΛc= (αΛc+αΛ̄c)(αΛc- αΛ̄c)=0.00±0.03(stat)±0.01(syst)±0.02, where the third error is from the uncertainty in the world average of the CP-violating parameter, AΛ, for Λ→pπ-.

Original language	English (US)
Article number	191801
Journal	Physical Review Letters
Volume	94
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevLett.94.191801
State	Published - May 20 2005

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.94.191801

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Hinson, J. W., Huang, G. S., Lee, J., Miller, D. H., Pavlunin, V., Rangarajan, R., Sanghi, B., Shibata, E. I., Shipsey, I. P. J., Cronin-Hennessy, D., Park, C. S., Park, W., Thayer, J. B., Thorndike, E. H., Coan, T. E., Gao, Y. S., Liu, F., Stroynowski, R., Artuso, M., ... Savinov, V. (2005). Improved measurement of the form factors in the decay Λc+→ Λe+νe. Physical Review Letters, 94(19), Article 191801. https://doi.org/10.1103/PhysRevLett.94.191801

Hinson, JW, Huang, GS, Lee, J, Miller, DH, Pavlunin, V, Rangarajan, R, Sanghi, B, Shibata, EI, Shipsey, IPJ, Cronin-Hennessy, D, Park, CS, Park, W, Thayer, JB, Thorndike, EH, Coan, TE, Gao, YS, Liu, F, Stroynowski, R, Artuso, M, Boulahouache, C, Blusk, S, Dambasuren, E, Dorjkhaidav, O, Mountain, R, Muramatsu, H, Nandakumar, R, Skwarnicki, T, Stone, S, Wang, JC, Csorna, SE, Danko, I, Bonvicini, G, Cinabro, D, Dubrovin, M, McGee, S, Bornheim, A, Lipeles, E, Pappas, SP, Shapiro, A, Sun, WM, Weinstein, AJ, Briere, RA, Chen, GP, Ferguson, T, Tatishvili, G, Vogel, H, Watkins, ME, Adam, NE, Alexander, JP, Berkelman, K, Boisvert, V, Cassel, DG, Duboscq, JE, Ecklund, KM, Ehrlich, R, Galik, RS, Gibbons, L, Gittelman, B, Gray, SW, Hartill, DL, Heltsley, BK, Hsu, L, Jones, CD, Kandaswamy, J, Kreinick, DL, Magerkurth, A, Mahlke-Krüger, H, Meyer, TO, Mistry, NB, Patterson, JR, Peterson, D, Pivarski, J, Richichi, SJ, Riley, D, Sadoff, AJ, Schwarthoff, H, Shepherd, MR, Thayer, JG, Urner, D, Wilksen, T, Warburton, A, Weinberger, M, Athar, SB, Avery, P, Breva-Newell, L, Potlia, V, Stoeck, H, Yelton, J, Benslama, K, Cawlfield, C, Eisenstein, BI, Gollin, GD, Karliner, I, Lowrey, N, Plager, C, Sedlack, C, Selen, M, Thaler, JJ, Williams, J, Edwards, KW, Besson, D, Anderson, S, Frolov, VV, Gong, DT, Kubota, Y, Li, SZ, Poling, R, Smith, A, Stepaniak, CJ, Urheim, J, Metreveli, Z, Seth, KK, Tomaradze, A, Zweber, P, Ahmed, S, Alam, MS, Ernst, J, Jian, L, Saleem, M, Wappler, F, Arms, K, Eckhart, E, Gan, KK, Gwon, C, Honscheid, K, Kagan, H, Kass, R, Pedlar, TK, von Toerne, E, Severini, H, Skubic, P, Dytman, SA, Mueller, JA, Nam, S & Savinov, V 2005, 'Improved measurement of the form factors in the decay Λc+→ Λe+νe', Physical Review Letters, vol. 94, no. 19, 191801. https://doi.org/10.1103/PhysRevLett.94.191801

@article{db6569a04d0541b0a86987125e3566fb,

title = "Improved measurement of the form factors in the decay Λc+→ Λe+νe",

abstract = "Using the CLEO detector at the Cornell Electron Storage Ring, we have studied the distribution of kinematic variables in the decay Λc+→Λe+νe. By performing a four-dimensional maximum likelihood fit, we determine the form factor ratio, R=f2/f1=-0.31±0. 05(stat)±0.04(syst), the pole mass, Mpole=[2.21±0.08(stat) ±0.14(syst)]GeV/c2, and the decay asymmetry parameter of the Λc+, αΛc=-0.86±0.03(stat)±0.02(syst), forq2=0.67 (GeV/c2)2. We compare the angular distributions of the Λc+ and {\=Λ}c- and find no evidence for CP violation: AΛc= (αΛc+α{\=Λ}c)(αΛc- α{\=Λ}c)=0.00±0.03(stat)±0.01(syst)±0.02, where the third error is from the uncertainty in the world average of the CP-violating parameter, AΛ, for Λ→pπ-.",

author = "Hinson, {J. W.} and Huang, {G. S.} and J. Lee and Miller, {D. H.} and V. Pavlunin and R. Rangarajan and B. Sanghi and Shibata, {E. I.} and Shipsey, {I. P.J.} and D. Cronin-Hennessy and Park, {C. S.} and W. Park and Thayer, {J. B.} and Thorndike, {E. H.} and Coan, {T. E.} and Gao, {Y. S.} and F. Liu and R. Stroynowski and M. Artuso and C. Boulahouache and S. Blusk and E. Dambasuren and O. Dorjkhaidav and R. Mountain and H. Muramatsu and R. Nandakumar and T. Skwarnicki and S. Stone and Wang, {J. C.} and Csorna, {S. E.} and I. Danko and G. Bonvicini and D. Cinabro and M. Dubrovin and S. McGee and A. Bornheim and E. Lipeles and Pappas, {S. P.} and A. Shapiro and Sun, {W. M.} and Weinstein, {A. J.} and Briere, {R. A.} and Chen, {G. P.} and T. Ferguson and G. Tatishvili and H. Vogel and Watkins, {M. E.} and Adam, {N. E.} and Alexander, {J. P.} and K. Berkelman and V. Boisvert and Cassel, {D. G.} and Duboscq, {J. E.} and Ecklund, {K. M.} and R. Ehrlich and Galik, {R. S.} and L. Gibbons and B. Gittelman and Gray, {S. W.} and Hartill, {D. L.} and Heltsley, {B. K.} and L. Hsu and Jones, {C. D.} and J. Kandaswamy and Kreinick, {D. L.} and A. Magerkurth and H. Mahlke-Kr{\"u}ger and Meyer, {T. O.} and Mistry, {N. B.} and Patterson, {J. R.} and D. Peterson and J. Pivarski and Richichi, {S. J.} and D. Riley and Sadoff, {A. J.} and H. Schwarthoff and Shepherd, {M. R.} and Thayer, {J. G.} and D. Urner and T. Wilksen and A. Warburton and M. Weinberger and Athar, {S. B.} and P. Avery and L. Breva-Newell and V. Potlia and H. Stoeck and J. Yelton and K. Benslama and C. Cawlfield and Eisenstein, {B. I.} and Gollin, {G. D.} and I. Karliner and N. Lowrey and C. Plager and C. Sedlack and M. Selen and Thaler, {J. J.} and J. Williams and Edwards, {K. W.} and D. Besson and S. Anderson and Frolov, {V. V.} and Gong, {D. T.} and Y. Kubota and Li, {S. Z.} and R. Poling and A. Smith and Stepaniak, {C. J.} and J. Urheim and Z. Metreveli and Seth, {K. K.} and A. Tomaradze and P. Zweber and S. Ahmed and Alam, {M. S.} and J. Ernst and L. Jian and M. Saleem and F. Wappler and K. Arms and E. Eckhart and Gan, {K. K.} and C. Gwon and K. Honscheid and H. Kagan and R. Kass and Pedlar, {T. K.} and {von Toerne}, E. and H. Severini and P. Skubic and Dytman, {S. A.} and Mueller, {J. A.} and S. Nam and V. Savinov",

year = "2005",

month = may,

day = "20",

doi = "10.1103/PhysRevLett.94.191801",

language = "English (US)",

volume = "94",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "19",

}

TY - JOUR

T1 - Improved measurement of the form factors in the decay Λc+→ Λe+νe

AU - Hinson, J. W.

AU - Huang, G. S.

AU - Lee, J.

AU - Miller, D. H.

AU - Pavlunin, V.

AU - Rangarajan, R.

AU - Sanghi, B.

AU - Shibata, E. I.

AU - Shipsey, I. P.J.

AU - Cronin-Hennessy, D.

AU - Park, C. S.

AU - Park, W.

AU - Thayer, J. B.

AU - Thorndike, E. H.

AU - Coan, T. E.

AU - Gao, Y. S.

AU - Liu, F.

AU - Stroynowski, R.

AU - Artuso, M.

AU - Boulahouache, C.

AU - Blusk, S.

AU - Dambasuren, E.

AU - Dorjkhaidav, O.

AU - Mountain, R.

AU - Muramatsu, H.

AU - Nandakumar, R.

AU - Skwarnicki, T.

AU - Stone, S.

AU - Wang, J. C.

AU - Csorna, S. E.

AU - Danko, I.

AU - Bonvicini, G.

AU - Cinabro, D.

AU - Dubrovin, M.

AU - McGee, S.

AU - Bornheim, A.

AU - Lipeles, E.

AU - Pappas, S. P.

AU - Shapiro, A.

AU - Sun, W. M.

AU - Weinstein, A. J.

AU - Briere, R. A.

AU - Chen, G. P.

AU - Ferguson, T.

AU - Tatishvili, G.

AU - Vogel, H.

AU - Watkins, M. E.

AU - Adam, N. E.

AU - Alexander, J. P.

AU - Berkelman, K.

AU - Boisvert, V.

AU - Cassel, D. G.

AU - Duboscq, J. E.

AU - Ecklund, K. M.

AU - Ehrlich, R.

AU - Galik, R. S.

AU - Gibbons, L.

AU - Gittelman, B.

AU - Gray, S. W.

AU - Hartill, D. L.

AU - Heltsley, B. K.

AU - Hsu, L.

AU - Jones, C. D.

AU - Kandaswamy, J.

AU - Kreinick, D. L.

AU - Magerkurth, A.

AU - Mahlke-Krüger, H.

AU - Meyer, T. O.

AU - Mistry, N. B.

AU - Patterson, J. R.

AU - Peterson, D.

AU - Pivarski, J.

AU - Richichi, S. J.

AU - Riley, D.

AU - Sadoff, A. J.

AU - Schwarthoff, H.

AU - Shepherd, M. R.

AU - Thayer, J. G.

AU - Urner, D.

AU - Wilksen, T.

AU - Warburton, A.

AU - Weinberger, M.

AU - Athar, S. B.

AU - Avery, P.

AU - Breva-Newell, L.

AU - Potlia, V.

AU - Stoeck, H.

AU - Yelton, J.

AU - Benslama, K.

AU - Cawlfield, C.

AU - Eisenstein, B. I.

AU - Gollin, G. D.

AU - Karliner, I.

AU - Lowrey, N.

AU - Plager, C.

AU - Sedlack, C.

AU - Selen, M.

AU - Thaler, J. J.

AU - Williams, J.

AU - Edwards, K. W.

AU - Besson, D.

AU - Anderson, S.

AU - Frolov, V. V.

AU - Gong, D. T.

AU - Kubota, Y.

AU - Li, S. Z.

AU - Poling, R.

AU - Smith, A.

AU - Stepaniak, C. J.

AU - Urheim, J.

AU - Metreveli, Z.

AU - Seth, K. K.

AU - Tomaradze, A.

AU - Zweber, P.

AU - Ahmed, S.

AU - Alam, M. S.

AU - Ernst, J.

AU - Jian, L.

AU - Saleem, M.

AU - Wappler, F.

AU - Arms, K.

AU - Eckhart, E.

AU - Gan, K. K.

AU - Gwon, C.

AU - Honscheid, K.

AU - Kagan, H.

AU - Kass, R.

AU - Pedlar, T. K.

AU - von Toerne, E.

AU - Severini, H.

AU - Skubic, P.

AU - Dytman, S. A.

AU - Mueller, J. A.

AU - Nam, S.

AU - Savinov, V.

PY - 2005/5/20

Y1 - 2005/5/20

N2 - Using the CLEO detector at the Cornell Electron Storage Ring, we have studied the distribution of kinematic variables in the decay Λc+→Λe+νe. By performing a four-dimensional maximum likelihood fit, we determine the form factor ratio, R=f2/f1=-0.31±0. 05(stat)±0.04(syst), the pole mass, Mpole=[2.21±0.08(stat) ±0.14(syst)]GeV/c2, and the decay asymmetry parameter of the Λc+, αΛc=-0.86±0.03(stat)±0.02(syst), forq2=0.67 (GeV/c2)2. We compare the angular distributions of the Λc+ and Λ̄c- and find no evidence for CP violation: AΛc= (αΛc+αΛ̄c)(αΛc- αΛ̄c)=0.00±0.03(stat)±0.01(syst)±0.02, where the third error is from the uncertainty in the world average of the CP-violating parameter, AΛ, for Λ→pπ-.

AB - Using the CLEO detector at the Cornell Electron Storage Ring, we have studied the distribution of kinematic variables in the decay Λc+→Λe+νe. By performing a four-dimensional maximum likelihood fit, we determine the form factor ratio, R=f2/f1=-0.31±0. 05(stat)±0.04(syst), the pole mass, Mpole=[2.21±0.08(stat) ±0.14(syst)]GeV/c2, and the decay asymmetry parameter of the Λc+, αΛc=-0.86±0.03(stat)±0.02(syst), forq2=0.67 (GeV/c2)2. We compare the angular distributions of the Λc+ and Λ̄c- and find no evidence for CP violation: AΛc= (αΛc+αΛ̄c)(αΛc- αΛ̄c)=0.00±0.03(stat)±0.01(syst)±0.02, where the third error is from the uncertainty in the world average of the CP-violating parameter, AΛ, for Λ→pπ-.

UR - http://www.scopus.com/inward/record.url?scp=27144463671&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=27144463671&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.94.191801

DO - 10.1103/PhysRevLett.94.191801

M3 - Article

AN - SCOPUS:27144463671

SN - 0031-9007

VL - 94

JO - Physical Review Letters

JF - Physical Review Letters

IS - 19

M1 - 191801

ER -

Improved measurement of the form factors in the decay Λc+→ Λe+νe

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