Correlated inclusive ΛΛ̄ production in e +e- annihilations at √s∼10.5 GeV

Z. Metreveli; K. K. Seth; A. Tomaradze; P. Zweber; S. Ahmed; M. S. Alam; L. Jian; M. Saleem; F. Wappler; E. Eckhart; K. K. Gan; C. Gwon; T. Hart; K. Honscheid; D. Hufnagel; H. Kagan; R. Kass; T. K. Pedlar; J. B. Thayer; T. Wilksen; M. M. Zoeller; H. Muramatsu; S. J. Richichi; H. Severini; P. Skubic; S. A. Dytman; J. A. Mueller; S. Nani; V. Savinov; S. Chen; J. W. Hinson; J. Lee; D. H. Miller; V. Pavlunin; E. I. Shibata; I. P.J. Shipsey; D. Cronin-Hennessy; A. L. Lyon; C. S. Park; W. Park; E. H. Thorndike; T. E. Coan; Y. S. Gao; F. Liu; Y. Maravin; I. Narsky; R. Stroynowski; M. Artuso; C. Boulahouache; K. Bukin; E. Dambasuren; K. Khroustalev; G. C. Moneti; R. Mountain; R. Nandakumar; T. Skwarnicki; S. Stone; J. C. Wang; A. H. Mahmood; S. E. Csorna; I. Danko; Z. Xu; G. Bonvicini; D. Cinabro; M. Dubrovin; S. McGee; A. Bornheim; E. Lipeles; S. P. Pappas; A. Shapiro; W. M. Sun; A. J. Weinstein; G. Masek; H. P. Paar; R. Mahapatra; R. A. Briere; G. P. Chen; T. Ferguson; G. Tatishvili; H. Vogel; N. E. Adam; J. P. Alexander; K. Berkelman; F. Blanc; V. Boisvert; D. G. Cassel; P. S. Drell; 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

doi:10.1103/PhysRevD.66.052002

Correlated inclusive ΛΛ̄ production in e ⁺e^- annihilations at √s∼10.5 GeV

Z. Metreveli^*, K. K. Seth, A. Tomaradze, P. Zweber, S. Ahmed, M. S. Alam, L. Jian, M. Saleem, F. Wappler, E. Eckhart, K. K. Gan, C. Gwon, T. Hart, K. Honscheid, D. Hufnagel, H. Kagan, R. Kass, T. K. Pedlar, J. B. Thayer, T. WilksenM. M. Zoeller, H. Muramatsu, S. J. Richichi, H. Severini, P. Skubic, S. A. Dytman, J. A. Mueller, S. Nani, V. Savinov, S. Chen, J. W. Hinson, J. Lee, D. H. Miller, V. Pavlunin, E. I. Shibata, I. P.J. Shipsey, D. Cronin-Hennessy, A. L. Lyon, C. S. Park, W. Park, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, Y. Maravin, I. Narsky, R. Stroynowski, M. Artuso, C. Boulahouache, K. Bukin, E. Dambasuren, K. Khroustalev, G. C. Moneti, R. Mountain, R. Nandakumar, T. Skwarnicki, S. Stone, J. C. Wang, A. H. Mahmood, S. E. Csorna, I. Danko, Z. Xu, G. Bonvicini, D. Cinabro, M. Dubrovin, S. McGee, A. Bornheim, E. Lipeles, S. P. Pappas, A. Shapiro, W. M. Sun, A. J. Weinstein, G. Masek, H. P. Paar, R. Mahapatra, R. A. Briere, G. P. Chen, T. Ferguson, G. Tatishvili, H. Vogel, N. E. Adam, J. P. Alexander, K. Berkelman, F. Blanc, V. Boisvert, D. G. Cassel, P. S. Drell, 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

^*Corresponding author for this work

Physics and Astronomy

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Abstract

Using a 13.7 fb^-1 sample of continuum two-jet e ⁺e^- → qq̄ events collected with the CLEO detector, we have searched for correlations between Λ and Λ̄ particles, specifically in cases where the opening angle between the two particles is large and each has momentum > 1 GeV/c. Such correlations may indicate the presence of baryon number conservation at the primary quark level. A previous CLEO study of Λ_cΛ_c correlations indicated direct, associated production of primary charmed baryons Λ_c: e⁺e^- → cc̄ → Λ_cΛ̄_c. That effect was not observed in Monte Carlo simulations. Our current search for similar direct, associated production of Λ baryons at the primary quark level (e⁺e ^- → ss̄ → ΛΛ̄, e.g.) qualitatively indicates a similar effect, although it relies on a Monte Carlo dependent subtraction of background ΛΛ̄ production (based on the default JETSET 7.4 event generator).

Original language	English (US)
Article number	052002
Journal	Physical Review D
Volume	66
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevD.66.052002
State	Published - 2002

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevD.66.052002

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Metreveli, Z., Seth, K. K., Tomaradze, A., Zweber, P., Ahmed, S., Alam, M. S., Jian, L., Saleem, M., Wappler, F., Eckhart, E., Gan, K. K., Gwon, C., Hart, T., Honscheid, K., Hufnagel, D., Kagan, H., Kass, R., Pedlar, T. K., Thayer, J. B., ... Kandaswamy, J. (2002). Correlated inclusive ΛΛ̄ production in e ⁺e^- annihilations at √s∼10.5 GeV. Physical Review D, 66(5), Article 052002. https://doi.org/10.1103/PhysRevD.66.052002

@article{5f7c2e2910974a579c1e27a89d590258,

title = "Correlated inclusive Λ{\=Λ} production in e +e- annihilations at √s∼10.5 GeV",

abstract = "Using a 13.7 fb-1 sample of continuum two-jet e +e- → q{\=q} events collected with the CLEO detector, we have searched for correlations between Λ and {\=Λ} particles, specifically in cases where the opening angle between the two particles is large and each has momentum > 1 GeV/c. Such correlations may indicate the presence of baryon number conservation at the primary quark level. A previous CLEO study of ΛcΛc correlations indicated direct, associated production of primary charmed baryons Λc: e+e- → c{\=c} → Λc{\=Λ}c. That effect was not observed in Monte Carlo simulations. Our current search for similar direct, associated production of Λ baryons at the primary quark level (e+e - → s{\=s} → Λ{\=Λ}, e.g.) qualitatively indicates a similar effect, although it relies on a Monte Carlo dependent subtraction of background Λ{\=Λ} production (based on the default JETSET 7.4 event generator).",

author = "Z. Metreveli and Seth, {K. K.} and A. Tomaradze and P. Zweber and S. Ahmed and Alam, {M. S.} and L. Jian and M. Saleem and F. Wappler and E. Eckhart and Gan, {K. K.} and C. Gwon and T. Hart and K. Honscheid and D. Hufnagel and H. Kagan and R. Kass and Pedlar, {T. K.} and Thayer, {J. B.} and T. Wilksen and Zoeller, {M. M.} and H. Muramatsu and Richichi, {S. J.} and H. Severini and P. Skubic and Dytman, {S. A.} and Mueller, {J. A.} and S. Nani and V. Savinov and S. Chen and Hinson, {J. W.} and J. Lee and Miller, {D. H.} and V. Pavlunin and Shibata, {E. I.} and Shipsey, {I. P.J.} and D. Cronin-Hennessy and Lyon, {A. L.} and Park, {C. S.} and W. Park and Thorndike, {E. H.} and Coan, {T. E.} and Gao, {Y. S.} and F. Liu and Y. Maravin and I. Narsky and R. Stroynowski and M. Artuso and C. Boulahouache and K. Bukin and E. Dambasuren and K. Khroustalev and Moneti, {G. C.} and R. Mountain and R. Nandakumar and T. Skwarnicki and S. Stone and Wang, {J. C.} and Mahmood, {A. H.} and Csorna, {S. E.} and I. Danko and Z. Xu 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 G. Masek and Paar, {H. P.} and R. Mahapatra and Briere, {R. A.} and Chen, {G. P.} and T. Ferguson and G. Tatishvili and H. Vogel and Adam, {N. E.} and Alexander, {J. P.} and K. Berkelman and F. Blanc and V. Boisvert and Cassel, {D. G.} and Drell, {P. S.} 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",

year = "2002",

doi = "10.1103/PhysRevD.66.052002",

language = "English (US)",

volume = "66",

journal = "Physical Review D",

issn = "0556-2821",

publisher = "American Institute of Physics",

number = "5",

}

Metreveli, Z, Seth, KK, Tomaradze, A, Zweber, P, Ahmed, S, Alam, MS, Jian, L, Saleem, M, Wappler, F, Eckhart, E, Gan, KK, Gwon, C, Hart, T, Honscheid, K, Hufnagel, D, Kagan, H, Kass, R, Pedlar, TK, Thayer, JB, Wilksen, T, Zoeller, MM, Muramatsu, H, Richichi, SJ, Severini, H, Skubic, P, Dytman, SA, Mueller, JA, Nani, S, Savinov, V, Chen, S, Hinson, JW, Lee, J, Miller, DH, Pavlunin, V, Shibata, EI, Shipsey, IPJ, Cronin-Hennessy, D, Lyon, AL, Park, CS, Park, W, Thorndike, EH, Coan, TE, Gao, YS, Liu, F, Maravin, Y, Narsky, I, Stroynowski, R, Artuso, M, Boulahouache, C, Bukin, K, Dambasuren, E, Khroustalev, K, Moneti, GC, Mountain, R, Nandakumar, R, Skwarnicki, T, Stone, S, Wang, JC, Mahmood, AH, Csorna, SE, Danko, I, Xu, Z, Bonvicini, G, Cinabro, D, Dubrovin, M, McGee, S, Bornheim, A, Lipeles, E, Pappas, SP, Shapiro, A, Sun, WM, Weinstein, AJ, Masek, G, Paar, HP, Mahapatra, R, Briere, RA, Chen, GP, Ferguson, T, Tatishvili, G, Vogel, H, Adam, NE, Alexander, JP, Berkelman, K, Blanc, F, Boisvert, V, Cassel, DG, Drell, PS, Duboscq, JE, Ecklund, KM, Ehrlich, R, Galik, RS, Gibbons, L, Gittelman, B, Gray, SW, Hartill, DL, Heltsley, BK, Hsu, L, Jones, CD & Kandaswamy, J 2002, 'Correlated inclusive ΛΛ̄ production in e ⁺e^- annihilations at √s∼10.5 GeV', Physical Review D, vol. 66, no. 5, 052002. https://doi.org/10.1103/PhysRevD.66.052002

TY - JOUR

T1 - Correlated inclusive ΛΛ̄ production in e +e- annihilations at √s∼10.5 GeV

AU - Metreveli, Z.

AU - Seth, K. K.

AU - Tomaradze, A.

AU - Zweber, P.

AU - Ahmed, S.

AU - Alam, M. S.

AU - Jian, L.

AU - Saleem, M.

AU - Wappler, F.

AU - Eckhart, E.

AU - Gan, K. K.

AU - Gwon, C.

AU - Hart, T.

AU - Honscheid, K.

AU - Hufnagel, D.

AU - Kagan, H.

AU - Kass, R.

AU - Pedlar, T. K.

AU - Thayer, J. B.

AU - Wilksen, T.

AU - Zoeller, M. M.

AU - Muramatsu, H.

AU - Richichi, S. J.

AU - Severini, H.

AU - Skubic, P.

AU - Dytman, S. A.

AU - Mueller, J. A.

AU - Nani, S.

AU - Savinov, V.

AU - Chen, S.

AU - Hinson, J. W.

AU - Lee, J.

AU - Miller, D. H.

AU - Pavlunin, V.

AU - Shibata, E. I.

AU - Shipsey, I. P.J.

AU - Cronin-Hennessy, D.

AU - Lyon, A. L.

AU - Park, C. S.

AU - Park, W.

AU - Thorndike, E. H.

AU - Coan, T. E.

AU - Gao, Y. S.

AU - Liu, F.

AU - Maravin, Y.

AU - Narsky, I.

AU - Stroynowski, R.

AU - Artuso, M.

AU - Boulahouache, C.

AU - Bukin, K.

AU - Dambasuren, E.

AU - Khroustalev, K.

AU - Moneti, G. C.

AU - Mountain, R.

AU - Nandakumar, R.

AU - Skwarnicki, T.

AU - Stone, S.

AU - Wang, J. C.

AU - Mahmood, A. H.

AU - Csorna, S. E.

AU - Danko, I.

AU - Xu, Z.

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 - Masek, G.

AU - Paar, H. P.

AU - Mahapatra, R.

AU - Briere, R. A.

AU - Chen, G. P.

AU - Ferguson, T.

AU - Tatishvili, G.

AU - Vogel, H.

AU - Adam, N. E.

AU - Alexander, J. P.

AU - Berkelman, K.

AU - Blanc, F.

AU - Boisvert, V.

AU - Cassel, D. G.

AU - Drell, P. S.

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.

PY - 2002

Y1 - 2002

N2 - Using a 13.7 fb-1 sample of continuum two-jet e +e- → qq̄ events collected with the CLEO detector, we have searched for correlations between Λ and Λ̄ particles, specifically in cases where the opening angle between the two particles is large and each has momentum > 1 GeV/c. Such correlations may indicate the presence of baryon number conservation at the primary quark level. A previous CLEO study of ΛcΛc correlations indicated direct, associated production of primary charmed baryons Λc: e+e- → cc̄ → ΛcΛ̄c. That effect was not observed in Monte Carlo simulations. Our current search for similar direct, associated production of Λ baryons at the primary quark level (e+e - → ss̄ → ΛΛ̄, e.g.) qualitatively indicates a similar effect, although it relies on a Monte Carlo dependent subtraction of background ΛΛ̄ production (based on the default JETSET 7.4 event generator).

AB - Using a 13.7 fb-1 sample of continuum two-jet e +e- → qq̄ events collected with the CLEO detector, we have searched for correlations between Λ and Λ̄ particles, specifically in cases where the opening angle between the two particles is large and each has momentum > 1 GeV/c. Such correlations may indicate the presence of baryon number conservation at the primary quark level. A previous CLEO study of ΛcΛc correlations indicated direct, associated production of primary charmed baryons Λc: e+e- → cc̄ → ΛcΛ̄c. That effect was not observed in Monte Carlo simulations. Our current search for similar direct, associated production of Λ baryons at the primary quark level (e+e - → ss̄ → ΛΛ̄, e.g.) qualitatively indicates a similar effect, although it relies on a Monte Carlo dependent subtraction of background ΛΛ̄ production (based on the default JETSET 7.4 event generator).

UR - http://www.scopus.com/inward/record.url?scp=14244270598&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=14244270598&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.66.052002

DO - 10.1103/PhysRevD.66.052002

M3 - Article

AN - SCOPUS:14244270598

SN - 0556-2821

VL - 66

JO - Physical Review D

JF - Physical Review D

IS - 5

M1 - 052002

ER -

Correlated inclusive ΛΛ̄ production in e ⁺e^- annihilations at √s∼10.5 GeV

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