A new measurement of the Ξ+ lifetime

Link, J. M.; Reyes, M.; Yager, P. M.; Anjos, J. C.; Bediaga, I.; Göbel, C.; Magnin, J.; Massafferri, A.; Miranda, J. M. De; Pepe, I. M.; Reis, A. C. dos; Carrillo, S.; Casimiro, E.; Sánchez-Hernández, A.; Uribe, C.; Vázquez, F.; Cinquini, L.; Cumalat, J. P.; O’Reilly, B.; Vargas, J. E. Ramirez; Vaandering, Eric Wayne; Butler, J. N.; Cheung, H. W. K.; Gaines, I.; Garbincius, P. H.; Garren, L.; Gottschalk, E.; Kasper, P.; Kreymer, A.; Kutschke, R.; Bianco, S.; Fabbri, F.; Zallo, A.; Cawlfield, C.; Kim, D.Y.; Rahimi, A. M.; Wiss, J.; Gardner, R.; Kryemadhi, A.; Chung, Y. S.; Kang, J. S.; Ko, B. R.; Kwak, J. W.; Lee, K.B.; Park, H.; Alimonti, G.; Boschini, M.; Chiodini, G.; D’Angelo, P.; DiCorato, M.; Dini, P.; Giammarchi, M.; Inzani, P.; Leveraro, F.; Malvezzi, S.; Menasce, D.; Mezzadri, M.; Milazzo, Lorenzo; Moroni, L.; Pedrini, D.; Pontoglio, C.; Prelz, F.; Rovere, M.; Sala, S.; Davenport, T. F.; Agostino, L.; Arena, Vincenzo; Boca, G.; Bonomi, G.; Gianini, G.; Liguori, G.; Merlo, M. M.; Pantea, D.; Ratti, S. P.; Riccardi, C.; Segoni, I.; Vitulo, P.; Hernandez, H.; López, A.; Méndez, H.; Cunqueiro, L.; Mirles, A.; Montiel, E.; Olaya, D.; Paris, A.; Quinones, J.; Rivera, C.; Xiong, W.; Zhang, Y.; Wilson, J. R.; Cho, K.; Handler, T.; Mitchell, R. E.; Engh, D.; Hosack, M.; Johns, W.; Nehring, M.; Sheldon, P.; Stenson, K.; Webster, M.; Sheaff, M.

doi:10.1016/s0370-2693(01)01322-3

Cited by 17 publications

(8 citation statements)

References 12 publications

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“…The recent measurements of charmed baryon lifetimes by the LHCb Collaboration [1][2][3] stand in marked contrast to earlier determinations. Whereas the lifetimes of the Λ + c and Ξ + c are compatible with previous experiments [4][5][6][7][8], that of the Ξ 0 c is in roughly 3σ tension with the older measurement [9,10]. Even more dramatically, the measured lifetime of the Ω 0 c of 274.5 fs is four times larger than, and wholly inconsistent with, earlier results [11,12].…”

supporting

confidence: 80%

Lifetimes of singly charmed hadrons

Gratrex,

Melić,

Nišandžić

2022

Preprint

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We provide an extensive study of the lifetimes of singly charmed baryons and mesons, within the heavy quark expansion with all known corrections included. A special attention is devoted to the choice of the charm mass and wavefunctions of heavy baryons. We give our predictions for lifetimes, lifetime ratios, and semileptonic branching ratios of singly charmed baryons. Our results accommodate the experimentally-favoured hierarchy of singly charmed baryon lifetimesin contrast to earlier theoretical findings. Predictions for charmed meson lifetimes and semileptonic decay rates are in agreement with a recent comprehensive study and experimental results within uncertainties.

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supporting

confidence: 80%

Lifetimes of singly charmed hadrons

Gratrex,

Melić,

Nišandžić

2022

Preprint

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“…Furthermore, very reasonable agreement was achieved in the sector of singly-charmed baryons [4,5]. However, recent measurements of the Ξ + c lifetime by FOCUS [6] and CLEO [7] collaborations indicate substantial discrepancy between new experimental data and the presently available theoretical result [4,8]:…”

mentioning

confidence: 85%

Cabibbo suppressed decays and theΞc+lifetime

Guberina

Štefančić

2002

Phys. Rev. D

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The problem of the Ξ + c lifetime is considered in the framework of Heavy-Quark Expansion and SU (3) f lavor symmetry. The lifetime of Ξ + c is expressed in terms of measurable inclusive quantities of the other two charmed baryons belonging to the same SU (3) f lavor multiplet in a model-independent way. In such a treatment, inclusive decay rates of singly Cabibbo suppressed decay modes have a prominent role. An analogous approach is applied to the multiplet of charmed mesons yielding interesting predictions on D + s properties. The results obtained indicate that a more precise measurement of inclusive decay quantities of some charmed hadrons (such as Λ + c ) that are more amenable to experiment can contribute significantly to our understanding of decay properties of other charmed hadrons (such as Ξ + c ) where discrepancies or ambiguities exist.

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“…The lifetimes of the other three ground state singly charmed baryons (Λ þ c , Ξ þ c and Ξ 0 c ) were last measured almost twenty years ago, and are only known with precisions of 3%, 6% and 10%, respectively [15]. The most precise measurements contributing to the average lifetimes are those from the FOCUS collaboration [16][17][18] based on signal sample sizes of approximately 8000 Λ þ c , 500 Ξ þ c and 100 Ξ 0 c decays. For the Λ þ c baryon, there is mild tension between the average lifetime obtained from fixed target experiments [16,19,20] and that obtained by the CLEO collaboration [21].…”

mentioning

confidence: 99%

A new measurement of the Ξ+ lifetime

Cited by 17 publications

References 12 publications

Lifetimes of singly charmed hadrons

Lifetimes of singly charmed hadrons

Cabibbo suppressed decays and theΞc+lifetime

Precision measurement of the Λc+ , Ξc+ , and
Aaij¹,
Beteta²,
Adeva³
et al. 2019
Phys. Rev. D
Self Cite
27
1
10
0
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A new measurement of the Ξ+ lifetime

Cited by 17 publications

References 12 publications

Lifetimes of singly charmed hadrons

Lifetimes of singly charmed hadrons

Cabibbo suppressed decays and theΞc+lifetime

Precision measurement of the Λc+ , Ξc+ , and Aaij1, Beteta2, Adeva3 et al. 2019Phys. Rev. DSelf Cite271100View full textAdd to dashboardCite

Contact Info

Product

Resources

About

Precision measurement of the Λc+ , Ξc+ , and
Aaij¹,
Beteta²,
Adeva³
et al. 2019
Phys. Rev. D
Self Cite
27
1
10
0
View full text Add to dashboard Cite