Study of KSKL coupled decays and KL-Be interactions with the CMD-2 detector at VEPP-2M collider

R. R. Akhmetshin; G. A. Aksenov; E. V. Anashkin; V. M. Aulchenko; B. O. Baibusinov; V. S. Banzarov; L. M. Barkov; S. E. Baru; A. E. Bondar; D. V. Chernyak; V. Danilov; S. I. Eidelman; G. V. Fedotovich; N. I. Gabyshev; A. A. Grebeniuk; D. N. Grigoriev; P. M. Ivanov; B. I. Khazin; I. A. Koop; A. S. Kuzmin; I. B. Logashenko; P. A. Lukin; A. P. Lysenko; A. V. Maksimov; Yu I. Merzlyakov; I. N. Nesterenko; V. S. Okhapkin; E. A. Perevedentsev; A. A. Polunin; E. V. Popkov; V. I. Ptitzyn; T. A. Purlats; S. I. Redin; N. I. Root; A. A. Ruban; N. M. Ryskulov; Yu M. Shatunov; A. E. Sher; M. A. Shubin; B. A. Shwartz; V. A. Sidorov; A. N. Skrinsky; V. P. Smakhtin; I. G. Snopkov; E. P. Solodov; A. I. Sukhanov; V. M. Titov; Yu V. Yudin; V. G. Zavarzin; D. H. Brown; J. P. Miller; B. L. Roberts; W. A. Worstell; J. A. Thompson; C. M. Valine; P. B. Cushman; S. K. Dhawan; V. W. Hughes

doi:10.1016/S0370-2693(97)00265-7

Study of K_SK_L coupled decays and K_L-Be interactions with the CMD-2 detector at VEPP-2M collider

R. R. Akhmetshin, G. A. Aksenov, E. V. Anashkin, V. M. Aulchenko, B. O. Baibusinov, V. S. Banzarov, L. M. Barkov, S. E. Baru, A. E. Bondar, D. V. Chernyak, V. Danilov, S. I. Eidelman, G. V. Fedotovich, N. I. Gabyshev, A. A. Grebeniuk, D. N. Grigoriev, P. M. Ivanov, B. I. Khazin, I. A. Koop, A. S. KuzminI. B. Logashenko, P. A. Lukin, A. P. Lysenko, A. V. Maksimov, Yu I. Merzlyakov, I. N. Nesterenko, V. S. Okhapkin, E. A. Perevedentsev, A. A. Polunin, E. V. Popkov, V. I. Ptitzyn, T. A. Purlats, S. I. Redin, N. I. Root, A. A. Ruban, N. M. Ryskulov, Yu M. Shatunov, A. E. Sher, M. A. Shubin, B. A. Shwartz, V. A. Sidorov, A. N. Skrinsky, V. P. Smakhtin, I. G. Snopkov, E. P. Solodov, A. I. Sukhanov, V. M. Titov, Yu V. Yudin, V. G. Zavarzin, D. H. Brown, J. P. Miller, B. L. Roberts, W. A. Worstell, J. A. Thompson, C. M. Valine, P. B. Cushman, S. K. Dhawan, V. W. Hughes

Physics and Astronomy (Twin Cities)

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

Abstract

An integrated luminosity ≈ 4000 nb^-1 of around θ meson mass (5.0 × 10⁶ of θ's) has been collected with the CMD-2 detector at the VEPP-2M collider. The latest analysis of the K_SK_L coupled decays based on 30% of available data is presented in this paper. The K_SK_L pairs from θ decays were reconstructed in the drift chamber when both kaons decayed into two charged particles. From a sample of 1423 coupled decays a selection of candidates for the CP-violating K_L -> → π⁺π^- decay was performed. CP-violating decays were not identified because of the dominance of events with a KL regenerating at the Be beam pipe into K_s and a background from K_L semileptonic decays. The regeneration cross section of 110 MeV/c K_L's was found to be σ^Be_reg = 53 ± 17 mb, in agreement with theoretical expectations. The angular distribution of K_s's after regeneration and the total cross section of K_L for Be have been measured.

Original language	English (US)
Pages (from-to)	423-431
Number of pages	9
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	398
Issue number	3-4
DOIs	https://doi.org/10.1016/S0370-2693(97)00265-7
State	Published - Apr 17 1997

Bibliographical note

Funding Information:
One of the authors (E.P.S.) would like to thank R. Baldini for useful discussions on the nuclear interaction studies and cooperation in this field and A. Michetti for simulation of the hyperon production of neutral kaons and theoretical cross section calculations. This work is supportedi n part by the US De-partamento f Energy, US National Science Foundation and the International Science Foundation under grants RPTOOO and RPT300.

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Akhmetshin, R. R., Aksenov, G. A., Anashkin, E. V., Aulchenko, V. M., Baibusinov, B. O., Banzarov, V. S., Barkov, L. M., Baru, S. E., Bondar, A. E., Chernyak, D. V., Danilov, V., Eidelman, S. I., Fedotovich, G. V., Gabyshev, N. I., Grebeniuk, A. A., Grigoriev, D. N., Ivanov, P. M., Khazin, B. I., Koop, I. A., ... Hughes, V. W. (1997). Study of K_SK_L coupled decays and K_L-Be interactions with the CMD-2 detector at VEPP-2M collider. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 398(3-4), 423-431. https://doi.org/10.1016/S0370-2693(97)00265-7

Akhmetshin, RR, Aksenov, GA, Anashkin, EV, Aulchenko, VM, Baibusinov, BO, Banzarov, VS, Barkov, LM, Baru, SE, Bondar, AE, Chernyak, DV, Danilov, V, Eidelman, SI, Fedotovich, GV, Gabyshev, NI, Grebeniuk, AA, Grigoriev, DN, Ivanov, PM, Khazin, BI, Koop, IA, Kuzmin, AS, Logashenko, IB, Lukin, PA, Lysenko, AP, Maksimov, AV, Merzlyakov, YI, Nesterenko, IN, Okhapkin, VS, Perevedentsev, EA, Polunin, AA, Popkov, EV, Ptitzyn, VI, Purlats, TA, Redin, SI, Root, NI, Ruban, AA, Ryskulov, NM, Shatunov, YM, Sher, AE, Shubin, MA, Shwartz, BA, Sidorov, VA, Skrinsky, AN, Smakhtin, VP, Snopkov, IG, Solodov, EP, Sukhanov, AI, Titov, VM, Yudin, YV, Zavarzin, VG, Brown, DH, Miller, JP, Roberts, BL, Worstell, WA, Thompson, JA, Valine, CM, Cushman, PB, Dhawan, SK & Hughes, VW 1997, 'Study of K_SK_L coupled decays and K_L-Be interactions with the CMD-2 detector at VEPP-2M collider', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 398, no. 3-4, pp. 423-431. https://doi.org/10.1016/S0370-2693(97)00265-7

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title = "Study of KSKL coupled decays and KL-Be interactions with the CMD-2 detector at VEPP-2M collider",

abstract = "An integrated luminosity ≈ 4000 nb-1 of around θ meson mass (5.0 × 106 of θ's) has been collected with the CMD-2 detector at the VEPP-2M collider. The latest analysis of the KSKL coupled decays based on 30% of available data is presented in this paper. The KSKL pairs from θ decays were reconstructed in the drift chamber when both kaons decayed into two charged particles. From a sample of 1423 coupled decays a selection of candidates for the CP-violating KL -> → π+π- decay was performed. CP-violating decays were not identified because of the dominance of events with a KL regenerating at the Be beam pipe into Ks and a background from KL semileptonic decays. The regeneration cross section of 110 MeV/c KL's was found to be σBereg = 53 ± 17 mb, in agreement with theoretical expectations. The angular distribution of Ks's after regeneration and the total cross section of KL for Be have been measured.",

author = "Akhmetshin, {R. R.} and Aksenov, {G. A.} and Anashkin, {E. V.} and Aulchenko, {V. M.} and Baibusinov, {B. O.} and Banzarov, {V. S.} and Barkov, {L. M.} and Baru, {S. E.} and Bondar, {A. E.} and Chernyak, {D. V.} and V. Danilov and Eidelman, {S. I.} and Fedotovich, {G. V.} and Gabyshev, {N. I.} and Grebeniuk, {A. A.} and Grigoriev, {D. N.} and Ivanov, {P. M.} and Khazin, {B. I.} and Koop, {I. A.} and Kuzmin, {A. S.} and Logashenko, {I. B.} and Lukin, {P. A.} and Lysenko, {A. P.} and Maksimov, {A. V.} and Merzlyakov, {Yu I.} and Nesterenko, {I. N.} and Okhapkin, {V. S.} and Perevedentsev, {E. A.} and Polunin, {A. A.} and Popkov, {E. V.} and Ptitzyn, {V. I.} and Purlats, {T. A.} and Redin, {S. I.} and Root, {N. I.} and Ruban, {A. A.} and Ryskulov, {N. M.} and Shatunov, {Yu M.} and Sher, {A. E.} and Shubin, {M. A.} and Shwartz, {B. A.} and Sidorov, {V. A.} and Skrinsky, {A. N.} and Smakhtin, {V. P.} and Snopkov, {I. G.} and Solodov, {E. P.} and Sukhanov, {A. I.} and Titov, {V. M.} and Yudin, {Yu V.} and Zavarzin, {V. G.} and Brown, {D. H.} and Miller, {J. P.} and Roberts, {B. L.} and Worstell, {W. A.} and Thompson, {J. A.} and Valine, {C. M.} and Cushman, {P. B.} and Dhawan, {S. K.} and Hughes, {V. W.}",

note = "Funding Information: One of the authors (E.P.S.) would like to thank R. Baldini for useful discussions on the nuclear interaction studies and cooperation in this field and A. Michetti for simulation of the hyperon production of neutral kaons and theoretical cross section calculations. This work is supportedi n part by the US De-partamento f Energy, US National Science Foundation and the International Science Foundation under grants RPTOOO and RPT300.",

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month = apr,

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doi = "10.1016/S0370-2693(97)00265-7",

language = "English (US)",

volume = "398",

pages = "423--431",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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TY - JOUR

T1 - Study of KSKL coupled decays and KL-Be interactions with the CMD-2 detector at VEPP-2M collider

AU - Akhmetshin, R. R.

AU - Aksenov, G. A.

AU - Anashkin, E. V.

AU - Aulchenko, V. M.

AU - Baibusinov, B. O.

AU - Banzarov, V. S.

AU - Barkov, L. M.

AU - Baru, S. E.

AU - Bondar, A. E.

AU - Chernyak, D. V.

AU - Danilov, V.

AU - Eidelman, S. I.

AU - Fedotovich, G. V.

AU - Gabyshev, N. I.

AU - Grebeniuk, A. A.

AU - Grigoriev, D. N.

AU - Ivanov, P. M.

AU - Khazin, B. I.

AU - Koop, I. A.

AU - Kuzmin, A. S.

AU - Logashenko, I. B.

AU - Lukin, P. A.

AU - Lysenko, A. P.

AU - Maksimov, A. V.

AU - Merzlyakov, Yu I.

AU - Nesterenko, I. N.

AU - Okhapkin, V. S.

AU - Perevedentsev, E. A.

AU - Polunin, A. A.

AU - Popkov, E. V.

AU - Ptitzyn, V. I.

AU - Purlats, T. A.

AU - Redin, S. I.

AU - Root, N. I.

AU - Ruban, A. A.

AU - Ryskulov, N. M.

AU - Shatunov, Yu M.

AU - Sher, A. E.

AU - Shubin, M. A.

AU - Shwartz, B. A.

AU - Sidorov, V. A.

AU - Skrinsky, A. N.

AU - Smakhtin, V. P.

AU - Snopkov, I. G.

AU - Solodov, E. P.

AU - Sukhanov, A. I.

AU - Titov, V. M.

AU - Yudin, Yu V.

AU - Zavarzin, V. G.

AU - Brown, D. H.

AU - Miller, J. P.

AU - Roberts, B. L.

AU - Worstell, W. A.

AU - Thompson, J. A.

AU - Valine, C. M.

AU - Cushman, P. B.

AU - Dhawan, S. K.

AU - Hughes, V. W.

N1 - Funding Information: One of the authors (E.P.S.) would like to thank R. Baldini for useful discussions on the nuclear interaction studies and cooperation in this field and A. Michetti for simulation of the hyperon production of neutral kaons and theoretical cross section calculations. This work is supportedi n part by the US De-partamento f Energy, US National Science Foundation and the International Science Foundation under grants RPTOOO and RPT300.

PY - 1997/4/17

Y1 - 1997/4/17

N2 - An integrated luminosity ≈ 4000 nb-1 of around θ meson mass (5.0 × 106 of θ's) has been collected with the CMD-2 detector at the VEPP-2M collider. The latest analysis of the KSKL coupled decays based on 30% of available data is presented in this paper. The KSKL pairs from θ decays were reconstructed in the drift chamber when both kaons decayed into two charged particles. From a sample of 1423 coupled decays a selection of candidates for the CP-violating KL -> → π+π- decay was performed. CP-violating decays were not identified because of the dominance of events with a KL regenerating at the Be beam pipe into Ks and a background from KL semileptonic decays. The regeneration cross section of 110 MeV/c KL's was found to be σBereg = 53 ± 17 mb, in agreement with theoretical expectations. The angular distribution of Ks's after regeneration and the total cross section of KL for Be have been measured.

AB - An integrated luminosity ≈ 4000 nb-1 of around θ meson mass (5.0 × 106 of θ's) has been collected with the CMD-2 detector at the VEPP-2M collider. The latest analysis of the KSKL coupled decays based on 30% of available data is presented in this paper. The KSKL pairs from θ decays were reconstructed in the drift chamber when both kaons decayed into two charged particles. From a sample of 1423 coupled decays a selection of candidates for the CP-violating KL -> → π+π- decay was performed. CP-violating decays were not identified because of the dominance of events with a KL regenerating at the Be beam pipe into Ks and a background from KL semileptonic decays. The regeneration cross section of 110 MeV/c KL's was found to be σBereg = 53 ± 17 mb, in agreement with theoretical expectations. The angular distribution of Ks's after regeneration and the total cross section of KL for Be have been measured.

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