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

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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
Externally published	Yes

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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

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

@article{c8c078cca24941209535eee79e1d0d6d,

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 Publising LLC",

number = "5",

}

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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