Measurement of the average lifetime of b-hadrons in Z decays

Acciarri, M.; Adriani, O.; Aguilar-Benı́tez, M.; Ahlen, S. P.; Alcaraz, J.; Alemanni, G.; Allaby, J.; Aloisio, A.; Alverson, G.; Alviggi, M. G.; Ambrosi, G.; Anderhub, H.; Andreev, V.; Angelescu, T.; Anselmo, F.; Arefiev, A.; Azemoon, T.; Aziz, T.; Bagnaia, P.; Baksay, L.; Ball, R. C.; Banerjee, S.; Banicz, K.; Barczyk, A.; Barillère, R.; Barone, L.; Bartalini, P.; Baschirotto, A.; Basile, M.; Battiston, R.; Bay, A.; Becattini, F.; Becker, U.; Behner, F.; Berdugo, J.; Berges, P.; Bertucci, B.; Betev, B.L.; Bhattacharya, S.; Biasini, M.; Biland, A.; Bilei, G. M.; Blaising, J. J.; Blyth, S.; Bobbink, G. J.; Böck, R.; Böhm, A.; Boldizsár, L.; Borgia, B.; Bourilkov, D.; Bourquin, M.; Boutigny, D.; Braccini, S.; Branson, J. G.; Brigljević, V.; Brock, I. C.; Buffini, A.; Buijs, A.; Bürger, J.; Burger, W. J.; Busenitz, J.; Cai, X. D.; Campanelli, M.; Capell, M.; Romeo, G.; Carlino, G.; Cartacci, A. M.; Casaus, J.; Castellini, G.; Cavallari, F.; Cavallo, N.; Cecchi, C.; Cerrada, M.; Cesaroni, F.; Chamizo, M.; Chang, Y. H.; Chaturvedi, U. K.; Chekanov, S.; Chemarin, M.; Chen, A; Chen, G; Chen, G.M; Chen, H.F; Chen, H.S; Chen, M; Chiefari, G.; Chien, C. Y.; Cifarelli, L.; Cindolo, F.; Civinini, C.; Clare, I.; Clare, R.; Cohn, H. O.; Coignet, G.; Colijn, A. P.; Colino, N.; Costantini, S.; Cotorobai, F.; Cruz, B. De La; Csilling, Á.; Dai, T.; D’Alessandro, R.; Asmundis, R. de; Degré, A.; Deiters, K.; Denes, P.; DeNotaristefani, F.; DiBitonto, D.; Diemoz, M.; Dierendonck, D. van; Lodovico, F. Di; Dionisi, C.; Dittmar, M.; Dominguez, A.; Doria, A.; Dova, M. T.; Drago, E.; Duchesneau, D.; Duinker, P.; Durán, I.; Dutta, S.; Easo, S.; Efremenko, Y. V.; Mamouni, H. El; Engler, A.; Eppling, F. J.; Erné, F.C.; Ernenwein, J.-P.; Extermann, P.; Fabre, Michel; Faccini, R.; Falciano, S.; Favara, A.; Fay, J.; Fedin, O. L.; Felcini, M.; Fenyi, B.; Ferguson, T.; Fernández, Daniel; Ferroni, F.; Fesefeldt, H.; Fiandrini, E.; Field, J. H.; Filthaut, F.; Fisher, P. H.; Fisk, I.; Forconì, G.; Fredj, L.; Freudenreich, K.; Furetta, C.; Galaktionov, Yu.; Ganguli, S. N.; Garcı́a-Abia, P.; Gau, S. S.; Gentile, S.; Gerald, J.; Gheordanescu, N.; Giagu, S.; Goldfarb, S.; Goldstein, J.; Gong, Z. F.; Gougas, A.; Gratta, G.; Gruenewald, M. W.; Gupta, V. K.; Gurtu, A.; Gutay, L.; Hartmann, B.; Hasan, A.; Hatzifotiadou, D.; Hebbeker, T.; Hervé, A.; Hoek, W. C. van; Höfer, H.; Hong, S. J.; Hoorani, H. R.; Hou, S.; Hu, G.; Innocente, V.; Jenkes, K.; Jin, B. N.; Jones, L. W.; Jong, P. de; Josa-Mutuberrı́a, I.; Kasser, A.; Khan, R. A.; Kamrad, D.; Kamyshkov, Yu.; Kapustinsky, J.; Karyotakis, Y.; Kaur, M.; Kienzle‐Focacci, M. N.; Kim, D; Kim, D.H; Kim, J.K; Kim, S.C; Kim, Y.G; Kinnison, W. W.; Kirkby, A.; Kirkby, D.; Kirkby, J.; Kiss, D.; Kittel, W.; Klimentov, A.; König, A.; Kopp, A. K.; Korolko, I.; Koutsenko, V.; Kraemer, R.W.; Krenz, W.; Kunin, A.; Lacentre, P.; Guevara, P. Ladrón de; Landi, G.; Lapoint, C.; Lassila-Perini, K.; Laurikainen, P.; Lebeau, M.; Lebedev, A.; Lebrun, P.; Lecomte, P.; Lecoq, P.; Coultre, P. Le; Lee, H.J; Leggett, C.; Goff, J. M. Le; Leiste, R.; Leonardi, E.; Levtchenko, P.; Li, C; Lin, C. H.; Lin, W.; Linde, F.L.; Lista, L.; Liu, Z.A; Lohmann, W.; Longo, E.; Lu, W.; Lu, Y. S.; Lübelsmeyer, K.; Luci, C.; Luckey, D.; Luminari, L.; Lustermann, W.; Wen-Gan, Ma; Maity, M.; Majumder, G.; Malgeri, L.; Малинин, А.; Mañá, C.; Mangeol, D.; Mangla, Sachin Kumar; Marchesini, P.; Marín, A.; Martin, J. P.; Marzano, F.; Massaro, G.; McNally, D.; Mele, S.; Merola, L.; Meschini, M.; Metzger, W. J.; Mey, M. von der; Mei, Yong; Mihul, A.; Mil, A. J.W. van; Milcent, H.; Mirabelli, G.; Mnich, J.; Molnár, Péter; Monteleoni, B.; Moore, R.; Morganti, S.; Moulik, T.; Mount, R.; Muheim, F.; Muijs, A. J.M.; Nahn, S.; Napolitano, M.; Nessi‐Tedaldi, F.; Newman, H. B.; Nießen, T.; Nippe, A.; Nisati, A.; Nowak, H.; Oh, Y. D.; Opitz, Herwart; Organtini, G.; Ostonen, R.; Palomares, C.; Pandoulas, D.; Paoletti, S.; Paolucci, P.; Park, H.K; Park, I.H; Pascale, Gennaro De; Passaleva, G.; Patricelli, S.; Paul, T.; Pauluzzi, M.; Paus, C.; Pauß, F.; Peach, D.; Pei, Y. J.; Pensotti, S.; Perret-Gallix, D.; Petersen, B. A.; Petrak, S.; Pevsner, A.; Piccolo, D.; Pieri, M.; Piroué, P.; Pistolesi, E.; Plyaskin, V.; Pohl, M.; Pojidaev, V.; Postema, H.; Produit, N.; Prokofiev, D.; Rahal-Callot, G.; Raja, N.; Rancoita, P.G.; Rattaggi, M.; Raven, G.; Razis, P. A.; Read, Kenneth Francis; Ren, D.; Rescigno, M.; Reucroft, S.; Rhee, T. van; Riemann, S.; Riles, K.; Rind, O.; Robohm, A.; Rodin, J.; Roe, B. P.; Romero, L.; Rosier‐Lees, S.; Rosselet, Ph.; Rossum, W. van; Roth, Stefan; Rubio, J. A.; Ruschmeier, D.; Rykaczewski, H.; Salicio, J.; Sánchez, E.; Sanders, M. P.; Sarakinos, M. E.; Sarkar, S.; Sauvage, G.; Schäfer, C.; Schegelsky, V. A.; Schmidt-Kaerst, S.; Schmitz, D.; Schneegans, M.; Scholz, N.; Schopper, H.; Schotanus, D. J.; Schwenke, J.; Schwering, G.; Sciacca, C.; Sciarrino, D.; Servoli, L.; Shevchenko, S.; Shivarov, N.; Shoutko, V.; Shukla, J.; Shumilov, E.; Shvorob, A.; Siedenburg, T.; Son, D.; Soulimov, V.; Smith, B. C.; Спиллантини, П.; Steuer, M.; Stickland, D.; Stone, Howard A.; Stoyanov, B.; Straessner, A.; Strauch, K.; Sudhakar, K.; Sultanov, G.; Sun, L.; Susinno, G.; Suter, H.; Swain, J.; Tang, X. W.; Tauscher, L.; Taylor, L.; Ting, Samuel C.C.; Ting, S. M.; Tonwar, S. C.; Töth, J.; Tully, C.; Tuchscherer, H.; Tung, K. L.; Uchida, Y.; Ulbricht, J.; Uwer, U.; Valente, E.; Walle, R. T. Van de; Vesztergombi, G.; Vetlitsky, I.; Viertel, G.; Vivargent, M.; Völkert, R.; Vogel, H.; Vogt, H.; Vorobiev, I.; Vorobyov, A. A.; Vorvolakos, A.; Wadhwa, M.; Wallraff, W.; Wang, J.C; Wang, X.L; Wang, Z.M; Weber, A.; Wu, S. X.; Wynhoff, S.; Xu, J.; Xu, Z. Z.; Yang, B. Z.; Yang, C. G.; Yao, Xiaojun; Ye, J.B; Yeh, S. C.; You, J. M.; Zalite, A.; Zalite, Yu; Zemp, P.; Zeng, Y.; Zhang, Z; Zhang, Z.P; Zhou, B.; Zhou, Y.; Zhu, G. Y.; Zhu, R. Y.; Zichichi, A.; Ziegler, F.

doi:10.1016/s0370-2693(97)01379-8

Cited by 14 publications

(14 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Monte Carlo impact parameter resolution was convoluted with two additional Gaussian functions for b and non-b events. The eight parameters of these Gaussian functions and the K 0 S = production rate hn K i have been determined in a similar way as in our previous publication [5] and the results agree.…”

Section: Lifetime Fitsupporting

confidence: 60%

“…The thrust axes of the jets used in this analysis were required to be in the polar angular range j cos j < 0:74. The reconstruction of the b b production vertex and the b decay vertices was performed with the same method applied in the measurement of the average b hadron lifetime [5,14]. Important features of this analysis are summarised in the following.…”

Section: Lifetime and Charge Measurementmentioning

confidence: 99%

“…The systematic error analysis applied to our previous measurement of the average b lifetime [5] has been repeated and complemented by the specic uncertainties of a charge-sensitive lifetime measurement. The results are summarised in Table 2 The error analysis has then been performed with this modied data sample.…”

Section: Systematic Uncertaintiesmentioning

confidence: 99%

“…The errors shown in Table 2 within the Peterson fragmentation model [19]. This parameter range refers to our previous measurement [5]. The transverse fragmentation has been studied by searching for dierences in the transverse momentum distribution of tracks with respect to the jet axis.…”

Section: Systematic Uncertaintiesmentioning

confidence: 99%

“…Previous measurements of the average b hadron lifetime [4,5] have been used to derive a v alue of the matrix element jV cb j of the Cabibbo-Kobayashi-Maskawa (CKM) matrix [6]. The inclusive decay time distribution at long time scales also provides information on .…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Upper limit on the lifetime difference of short- and long-lived B0s mesons

Acciarri¹,

Adriani²,

Aguilar-Benı́tez³

et al. 1998

Physics Letters B

View full text Add to dashboard Cite

An upper limit on the lifetime dierence of short-and long-lived B 0 s mesons has been obtained using an inclusive bottom hadron sample from 2 million hadronic Z decays collected by the L3 experiment at LEP. A lifetime t has been performed on data samples separately enriched in neutral and charged b hadrons. An experimental upper limit on the decay rate dierence of short-and long-lived B 0 s mesons of

show abstract

Section: Lifetime Fitsupporting

confidence: 60%

Section: Lifetime and Charge Measurementmentioning

confidence: 99%

Section: Systematic Uncertaintiesmentioning

confidence: 99%

Section: Systematic Uncertaintiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Upper limit on the lifetime difference of short- and long-lived B0s mesons

Acciarri¹,

Adriani²,

Aguilar-Benı́tez³

et al. 1998

Physics Letters B

View full text Add to dashboard Cite

show abstract

Precision electroweak measurements on the Z resonance

2006

View full text Add to dashboard Cite

We report on the final electroweak measurements performed with data taken at the Z resonance by the experiments operating at the electron–positron colliders SLC and LEP. The data consist of 17 million Z decays accumulated by the ALEPH, DELPHI, L3 and OPAL experiments at LEP, and 600 thousand Z decays by the SLD experiment using a polarised beam at SLC. The measurements include cross-sections, forward–backward asymmetries and polarised asymmetries. The mass and width of the Z boson, mZmZ and ΓZΓZ, and its couplings to fermions, for example the ρρ parameter and the effective electroweak mixing angle for leptons, are precisely measured: mZ = 91.1875 ± 0.0021 GeV, Γ Z = 2.4952 ± 0.0023 GeV, ρℓ= 1.0050 ± 0.0010, sin2 θ (sup)lept (sub>eff = 0.23153 ± 0.00016. The number of light neutrino species is determined to be 2.9840 ± 0.0082, in agreement with the three observed generations of fundamental fermions. The results are compared to the predictions of the Standard Model (SM). At the Z-pole, electroweak radiative corrections beyond the running of the QED and QCD coupling constants are observed with a significance of five standard deviations, and in agreement with the Standard Model. Of the many Z-pole measurements, the forward–backward asymmetry in b-quark production shows the largest difference with respect to its SM expectation, at the level of 2.8 standard deviations. Through radiative corrections evaluated in the framework of the Standard Model, the Z-pole data are also used to predict the mass of the top quark, mt = 173+13 −10 GeV, and the mass of theW boson, mW = 80.363 ± 0.032 GeV. These indirect constraints are compared to the direct measurements, providing a stringent test of the SM. Using in addition the direct measurements of mt and and mWmW, the mass of the as yet unobserved SM Higgs boson is predicted with a relative uncertainty of about 50% and found to be less than 285GeV at 95% confidence level

show abstract

Estimate of the three-loop perturbative contribution to inclusive semileptonic b→u decays

et al. 2000

View full text Add to dashboard Cite

D ecem ber 19,2013A bstract W e uti l i ze asym ptoti c Pad e-approxi m ant m ethods to esti m ate the three-l oop order M S-schem e coe ci ents w i thi n the i ncl usi ve b ! u ' ' decay rate for four and ve acti ve quark avours. T he esti m ates w e obtai n for the three renorm al i zati on-group-accessi bl e coe ci ents w i thi n the three-l oop contri buti on are al l found to be w i thi n 5. 1% of thei r true val ues,usi ng a l east-squares procedure i n conjuncti on w i th an asym ptoti c Pad eapproxi m ant esti m ate ofthe three-l oop term over the enti re m b dom ai n. G i ven the i nput val ues s(M Z )= 0: 118 0: 004 and m b (m b )= 4: 17 0: 05 G eV ,the three-l oop expressi on for the purel y-perturbati ve contri buti on to the b ! u ' ' decay rate i s m i ni m al l y sensi ti ve to renorm al i zati on scal e at = 1: 775 G eV ,at w hi ch scal e the three-l oop contri buti on i s esti m ated to be onl y 1. 4% ofthe l eadi ng tree-ordercontri buti on. W e esti m ate the ful lperturbati ve decay rate to be 192 3 (b ! u ' ' )= G 2 F j V u b j 2 = 2070 G eV 5 16% ,i ncl usi ve oftheoreti cal uncertai nti es from seri es truncati on,the i nput param eters,and the esti m ati on procedure.

show abstract

Measurement of the average lifetime of b-hadrons in Z decays

Abstract: We present a measurement of the average b-hadron lifetime b at the e

Cited by 14 publications

References 33 publications

Upper limit on the lifetime difference of short- and long-lived B0s mesons

Upper limit on the lifetime difference of short- and long-lived B0s mesons

Precision electroweak measurements on the Z resonance

Estimate of the three-loop perturbative contribution to inclusive semileptonic b→u decays

Contact Info

Product

Resources

About