Study of the decay asymmetry parameter and CP violation parameter in the Λc+ → Λπ+ decay

J. M. Link; P. M. Yager; J. C. Anjos; I. Bediaga; C. Castromonte; A. A. Machado; J. Magnin; A. Massafferri; J. M. De Miranda; I. M. Pepe; E. Polycarpo; A. C. Dos Reis; S. Carrillo; E. Casimiro; E. Cuautle; A. Sánchez-Hernández; C. Uribe; F. Vázquez; L. Agostino; L. Cinquini; J. P. Cumalat; B. O'Reilly; I. Segoni; K. Stenson; J. N. Butler; H. W.K. Cheung; G. Chiodini; I. Gaines; P. H. Garbincius; L. A. Garren; E. Gottschalk; P. H. Kasper; A. E. Kreymer; R. Kutschke; M. Wang; L. Benussi; M. Bertani; S. Bianco; F. L. Fabbri; S. Pacetti; A. Zallo; M. Reyes; C. Cawlfield; D. Y. Kim; A. Rahimi; J. Wiss; R. Gardner; A. Kryemadhi; Y. S. Chung; J. S. Kang; B. R. Ko; J. W. Kwak; K. B. Lee; K. Cho; H. Park; G. Alimonti; S. Barberis; M. Boschini; A. Cerutti; P. D'Angelo; M. DiCorato; P. Dini; L. Edera; S. Erba; P. Inzani; F. Leveraro; S. Malvezzi; D. Menasce; M. Mezzadri; L. Moroni; D. Pedrini; C. Pontoglio; F. Prelz; M. Rovere; S. Sala; T. F. Davenport; V. Arena; G. Boca; G. Bonomi; G. Gianini; G. Liguori; D. Lopes Pegna; M. M. Merlo; D. Pantea; S. P. Ratti; C. Riccardi; P. Vitulo; C. Göbel; J. Olatora; H. Hernandez; A. M. Lopez; H. Mendez; A. Paris; J. Quinones; J. E. Ramirez; Y. Zhang; J. R. Wilson; T. Handler; R. Mitchell; D. Engh; M. Hosack; W. E. Johns; E. Luiggi; J. E. Moore; M. Nehring; P. D. Sheldon; E. W. Vaandering; M. Webster; M. Sheaff

doi:10.1016/j.physletb.2006.01.017

Study of the decay asymmetry parameter and CP violation parameter in the Λ_c⁺ → Λπ⁺ decay

J. M. Link, P. M. Yager, J. C. Anjos, I. Bediaga, C. Castromonte, A. A. Machado, J. Magnin, A. Massafferri, J. M. De Miranda, I. M. Pepe, E. Polycarpo, A. C. Dos Reis, S. Carrillo, E. Casimiro, E. Cuautle, A. Sánchez-Hernández, C. Uribe, F. Vázquez, L. Agostino, L. CinquiniJ. P. Cumalat, B. O'Reilly, I. Segoni, K. Stenson, J. N. Butler, H. W.K. Cheung, G. Chiodini, I. Gaines, P. H. Garbincius, L. A. Garren, E. Gottschalk, P. H. Kasper, A. E. Kreymer, R. Kutschke, M. Wang, L. Benussi, M. Bertani, S. Bianco, F. L. Fabbri, S. Pacetti, A. Zallo, M. Reyes, C. Cawlfield, D. Y. Kim, A. Rahimi, J. Wiss, R. Gardner, A. Kryemadhi, Y. S. Chung, J. S. Kang, B. R. Ko, J. W. Kwak, K. B. Lee, K. Cho, H. Park, G. Alimonti, S. Barberis, M. Boschini, A. Cerutti, P. D'Angelo, M. DiCorato, P. Dini, L. Edera, S. Erba, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, M. Mezzadri, L. Moroni, D. Pedrini, C. Pontoglio, F. Prelz, M. Rovere, S. Sala, T. F. Davenport, V. Arena, G. Boca, G. Bonomi, G. Gianini, G. Liguori, D. Lopes Pegna, M. M. Merlo, D. Pantea, S. P. Ratti, C. Riccardi, P. Vitulo, C. Göbel, J. Olatora, H. Hernandez, A. M. Lopez, H. Mendez, A. Paris, J. Quinones, J. E. Ramirez, Y. Zhang, J. R. Wilson, T. Handler, R. Mitchell, D. Engh, M. Hosack, W. E. Johns, E. Luiggi, J. E. Moore, M. Nehring, P. D. Sheldon, E. W. Vaandering, M. Webster, M. Sheaff

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

Abstract

Using data from the FOCUS (E831) experiment at Fermilab, we present a new measurement of the weak decay-asymmetry parameter α_Λc in Λ_c⁺→Λπ⁺ decay. Comparing particle with antiparticle decays, we obtain the first measurement of the CP violation parameter A≡α_Λc+α _Λc/α_Λc-α_Λc. We obtain α_Λc=-0.78±0.16±0.19 and A=-0.07±0.19±0.24 where errors are statistical and systematic.

Original language	English (US)
Pages (from-to)	165-172
Number of pages	8
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	634
Issue number	2-3
DOIs	https://doi.org/10.1016/j.physletb.2006.01.017
State	Published - Mar 9 2006
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

Online availability

10.1016/j.physletb.2006.01.017

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Cite this

Link, J. M., Yager, P. M., Anjos, J. C., Bediaga, I., Castromonte, C., Machado, A. A., Magnin, J., Massafferri, A., De Miranda, J. M., Pepe, I. M., Polycarpo, E., Dos Reis, A. C., Carrillo, S., Casimiro, E., Cuautle, E., Sánchez-Hernández, A., Uribe, C., Vázquez, F., Agostino, L., ... Sheaff, M. (2006). Study of the decay asymmetry parameter and CP violation parameter in the Λ_c⁺ → Λπ⁺ decay. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 634(2-3), 165-172. https://doi.org/10.1016/j.physletb.2006.01.017

Link, JM, Yager, PM, Anjos, JC, Bediaga, I, Castromonte, C, Machado, AA, Magnin, J, Massafferri, A, De Miranda, JM, Pepe, IM, Polycarpo, E, Dos Reis, AC, Carrillo, S, Casimiro, E, Cuautle, E, Sánchez-Hernández, A, Uribe, C, Vázquez, F, Agostino, L, Cinquini, L, Cumalat, JP, O'Reilly, B, Segoni, I, Stenson, K, Butler, JN, Cheung, HWK, Chiodini, G, Gaines, I, Garbincius, PH, Garren, LA, Gottschalk, E, Kasper, PH, Kreymer, AE, Kutschke, R, Wang, M, Benussi, L, Bertani, M, Bianco, S, Fabbri, FL, Pacetti, S, Zallo, A, Reyes, M, Cawlfield, C, Kim, DY, Rahimi, A, Wiss, J, Gardner, R, Kryemadhi, A, Chung, YS, Kang, JS, Ko, BR, Kwak, JW, Lee, KB, Cho, K, Park, H, Alimonti, G, Barberis, S, Boschini, M, Cerutti, A, D'Angelo, P, DiCorato, M, Dini, P, Edera, L, Erba, S, Inzani, P, Leveraro, F, Malvezzi, S, Menasce, D, Mezzadri, M, Moroni, L, Pedrini, D, Pontoglio, C, Prelz, F, Rovere, M, Sala, S, Davenport, TF, Arena, V, Boca, G, Bonomi, G, Gianini, G, Liguori, G, Lopes Pegna, D, Merlo, MM, Pantea, D, Ratti, SP, Riccardi, C, Vitulo, P, Göbel, C, Olatora, J, Hernandez, H, Lopez, AM, Mendez, H, Paris, A, Quinones, J, Ramirez, JE, Zhang, Y, Wilson, JR, Handler, T, Mitchell, R, Engh, D, Hosack, M, Johns, WE, Luiggi, E, Moore, JE, Nehring, M, Sheldon, PD, Vaandering, EW, Webster, M & Sheaff, M 2006, 'Study of the decay asymmetry parameter and CP violation parameter in the Λ_c⁺ → Λπ⁺ decay', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 634, no. 2-3, pp. 165-172. https://doi.org/10.1016/j.physletb.2006.01.017

@article{ef898bc025c94f3bbfe41fd35ae9fe23,

title = "Study of the decay asymmetry parameter and CP violation parameter in the Λc+ → Λπ+ decay",

abstract = "Using data from the FOCUS (E831) experiment at Fermilab, we present a new measurement of the weak decay-asymmetry parameter αΛc in Λc+→Λπ+ decay. Comparing particle with antiparticle decays, we obtain the first measurement of the CP violation parameter A≡αΛc+α Λc/αΛc-αΛc. We obtain αΛc=-0.78±0.16±0.19 and A=-0.07±0.19±0.24 where errors are statistical and systematic.",

author = "Link, {J. M.} and Yager, {P. M.} and Anjos, {J. C.} and I. Bediaga and C. Castromonte and Machado, {A. A.} and J. Magnin and A. Massafferri and {De Miranda}, {J. M.} and Pepe, {I. M.} and E. Polycarpo and {Dos Reis}, {A. C.} and S. Carrillo and E. Casimiro and E. Cuautle and A. S{\'a}nchez-Hern{\'a}ndez and C. Uribe and F. V{\'a}zquez and L. Agostino and L. Cinquini and Cumalat, {J. P.} and B. O'Reilly and I. Segoni and K. Stenson and Butler, {J. N.} and Cheung, {H. W.K.} and G. Chiodini and I. Gaines and Garbincius, {P. H.} and Garren, {L. A.} and E. Gottschalk and Kasper, {P. H.} and Kreymer, {A. E.} and R. Kutschke and M. Wang and L. Benussi and M. Bertani and S. Bianco and Fabbri, {F. L.} and S. Pacetti and A. Zallo and M. Reyes and C. Cawlfield and Kim, {D. Y.} and A. Rahimi and J. Wiss and R. Gardner and A. Kryemadhi and Chung, {Y. S.} and Kang, {J. S.} and Ko, {B. R.} and Kwak, {J. W.} and Lee, {K. B.} and K. Cho and H. Park and G. Alimonti and S. Barberis and M. Boschini and A. Cerutti and P. D'Angelo and M. DiCorato and P. Dini and L. Edera and S. Erba and P. Inzani and F. Leveraro and S. Malvezzi and D. Menasce and M. Mezzadri and L. Moroni and D. Pedrini and C. Pontoglio and F. Prelz and M. Rovere and S. Sala and Davenport, {T. F.} and V. Arena and G. Boca and G. Bonomi and G. Gianini and G. Liguori and {Lopes Pegna}, D. and Merlo, {M. M.} and D. Pantea and Ratti, {S. P.} and C. Riccardi and P. Vitulo and C. G{\"o}bel and J. Olatora and H. Hernandez and Lopez, {A. M.} and H. Mendez and A. Paris and J. Quinones and Ramirez, {J. E.} and Y. Zhang and Wilson, {J. R.} and T. Handler and R. Mitchell and D. Engh and M. Hosack and Johns, {W. E.} and E. Luiggi and Moore, {J. E.} and M. Nehring and Sheldon, {P. D.} and Vaandering, {E. W.} and M. Webster and M. Sheaff",

note = "Funding Information: We wish to acknowledge the assistance of the staffs of Fermi National Accelerator Laboratory, the INFN of Italy, and the physics departments of the collaborating institutions. This research was supported in part by the US National Science Foundation, the US Department of Energy, the Italian Istituto Nazionale di Fisica Nucleare and Ministero della Istruzione Universit{\`a} e Ricerca, the Brazilian Conselho Nacional de Desenvolvimento Cient{\'i}fico e Tecnol{\'o}gico, CONACyT-M{\'e}xico, and the Korea Research Foundation of the Korean Ministry of Education.",

year = "2006",

month = mar,

day = "9",

doi = "10.1016/j.physletb.2006.01.017",

language = "English (US)",

volume = "634",

pages = "165--172",

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

issn = "0370-2693",

publisher = "Elsevier",

number = "2-3",

}

TY - JOUR

T1 - Study of the decay asymmetry parameter and CP violation parameter in the Λc+ → Λπ+ decay

AU - Link, J. M.

AU - Yager, P. M.

AU - Anjos, J. C.

AU - Bediaga, I.

AU - Castromonte, C.

AU - Machado, A. A.

AU - Magnin, J.

AU - Massafferri, A.

AU - De Miranda, J. M.

AU - Pepe, I. M.

AU - Polycarpo, E.

AU - Dos Reis, A. C.

AU - Carrillo, S.

AU - Casimiro, E.

AU - Cuautle, E.

AU - Sánchez-Hernández, A.

AU - Uribe, C.

AU - Vázquez, F.

AU - Agostino, L.

AU - Cinquini, L.

AU - Cumalat, J. P.

AU - O'Reilly, B.

AU - Segoni, I.

AU - Stenson, K.

AU - Butler, J. N.

AU - Cheung, H. W.K.

AU - Chiodini, G.

AU - Gaines, I.

AU - Garbincius, P. H.

AU - Garren, L. A.

AU - Gottschalk, E.

AU - Kasper, P. H.

AU - Kreymer, A. E.

AU - Kutschke, R.

AU - Wang, M.

AU - Benussi, L.

AU - Bertani, M.

AU - Bianco, S.

AU - Fabbri, F. L.

AU - Pacetti, S.

AU - Zallo, A.

AU - Reyes, M.

AU - Cawlfield, C.

AU - Kim, D. Y.

AU - Rahimi, A.

AU - Wiss, J.

AU - Gardner, R.

AU - Kryemadhi, A.

AU - Chung, Y. S.

AU - Kang, J. S.

AU - Ko, B. R.

AU - Kwak, J. W.

AU - Lee, K. B.

AU - Cho, K.

AU - Park, H.

AU - Alimonti, G.

AU - Barberis, S.

AU - Boschini, M.

AU - Cerutti, A.

AU - D'Angelo, P.

AU - DiCorato, M.

AU - Dini, P.

AU - Edera, L.

AU - Erba, S.

AU - Inzani, P.

AU - Leveraro, F.

AU - Malvezzi, S.

AU - Menasce, D.

AU - Mezzadri, M.

AU - Moroni, L.

AU - Pedrini, D.

AU - Pontoglio, C.

AU - Prelz, F.

AU - Rovere, M.

AU - Sala, S.

AU - Davenport, T. F.

AU - Arena, V.

AU - Boca, G.

AU - Bonomi, G.

AU - Gianini, G.

AU - Liguori, G.

AU - Lopes Pegna, D.

AU - Merlo, M. M.

AU - Pantea, D.

AU - Ratti, S. P.

AU - Riccardi, C.

AU - Vitulo, P.

AU - Göbel, C.

AU - Olatora, J.

AU - Hernandez, H.

AU - Lopez, A. M.

AU - Mendez, H.

AU - Paris, A.

AU - Quinones, J.

AU - Ramirez, J. E.

AU - Zhang, Y.

AU - Wilson, J. R.

AU - Handler, T.

AU - Mitchell, R.

AU - Engh, D.

AU - Hosack, M.

AU - Johns, W. E.

AU - Luiggi, E.

AU - Moore, J. E.

AU - Nehring, M.

AU - Sheldon, P. D.

AU - Vaandering, E. W.

AU - Webster, M.

AU - Sheaff, M.

N1 - Funding Information: We wish to acknowledge the assistance of the staffs of Fermi National Accelerator Laboratory, the INFN of Italy, and the physics departments of the collaborating institutions. This research was supported in part by the US National Science Foundation, the US Department of Energy, the Italian Istituto Nazionale di Fisica Nucleare and Ministero della Istruzione Università e Ricerca, the Brazilian Conselho Nacional de Desenvolvimento Científico e Tecnológico, CONACyT-México, and the Korea Research Foundation of the Korean Ministry of Education.

PY - 2006/3/9

Y1 - 2006/3/9

N2 - Using data from the FOCUS (E831) experiment at Fermilab, we present a new measurement of the weak decay-asymmetry parameter αΛc in Λc+→Λπ+ decay. Comparing particle with antiparticle decays, we obtain the first measurement of the CP violation parameter A≡αΛc+α Λc/αΛc-αΛc. We obtain αΛc=-0.78±0.16±0.19 and A=-0.07±0.19±0.24 where errors are statistical and systematic.

AB - Using data from the FOCUS (E831) experiment at Fermilab, we present a new measurement of the weak decay-asymmetry parameter αΛc in Λc+→Λπ+ decay. Comparing particle with antiparticle decays, we obtain the first measurement of the CP violation parameter A≡αΛc+α Λc/αΛc-αΛc. We obtain αΛc=-0.78±0.16±0.19 and A=-0.07±0.19±0.24 where errors are statistical and systematic.

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UR - http://www.scopus.com/inward/citedby.url?scp=33144475210&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2006.01.017

DO - 10.1016/j.physletb.2006.01.017

M3 - Article

AN - SCOPUS:33144475210

SN - 0370-2693

VL - 634

SP - 165

EP - 172

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 2-3

ER -