Precise Measurement of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="italic">B</mml:mi></mml:math>Meson Lifetimes with Hadronic Decay Final States

Abe, Kazuo; R, Abe; Abe, T.; Adachi, I.; Ahn, Byoung Sup; Aihara, H.; Akatsu, M.; Asano, Y.; Aso, T.; Aushev, T.; Bakich, A. M.; Ban, Y.; Banaś, E.; Behari, S.; Behera, P. K.; Bondar, A.; Bożek, A.; Brodzicka, J.; Browder, T. E.; Casey, B. C.K.; Chang, P.; Chào, Y.; Cheon, B.G.; Chistov, R.; Choi, S. K.; Choi, Y.; Liu, Dong; Dragic, J.; Drutskoy, A.; Eidelman, S.; Eiges, V.; Enari, Y.; Everton, C.W.; Fang, F.; Fujii, Hirofumi; Fukunaga, C.; Fukushima, M.; Gabyshev, N.; Garmash, A.; Gershon, T.; Gordon, A.; Guler, H.; Guo, R. S.; Haba, J.; Hamasaki, Hiroshi; Hanagaki, K.; Handa, F.; Hara, K.; Hara, T.; Hastings, N. C.; Hayashii, H.; Hazumi, M.; Heenan, E. M.; Higuchi, I.; Higuchi, T.; Hokuue, T.; Hoshi, Y.; Hou, S.; Hou, W.-S.; Hsu, S.-C.; Huang, H.-C.; Igaki, T.; Igarashi, Y.; Iijima, T.; Ikeda, H.; Inami, K.; Ishikawa, A.; Ishino, H.; Itoh, R.; Iwasaki, H.; Iwasaki, M.; Jang, H. K.; Kang, J. H.; Kang, J. S.; Kapusta, P.; Katayama, N.; Kawai, H.; Kawakami, Y.; Kawamura, N.; Kawasaki, T.; Kichimi, H.; Kim, D. W.; Kim, Heejong; Kim, H. J.; Kim, H. O.; Kim, Hyun Woo; Kim, S. K.; Kim, T. H.; Kinoshita, K.; Konishi, H.; Korpar, S.; Križan, P.; Krokovny, P.; Kulasiri, R.; Kumar, Suneel; Kuzmin, A.; Kwon, Y. J.; Lange, J. S.; Lee, S. H.; Limosani, A.; Liventsev, D.; Lu, R.-S.; MacNaughton, J.; Majumder, G.; Mandl, F.; Marlow, D.; Matsubara, T.; Matsuishi, T.; Matsumoto, S.; Matsumoto, T.; Mikami, Y.; Mitaroff, W.; Miyabayashi, K.; Miyabayashi, Y.; Miyake, H.; Miyata, H.; Moloney, G. R.; Mori, Shigeki; Mori, T.; Nagamine, T.; Nagasaka, Y.; Nagashima, Y.; Nakadaira, T.; Nakano, E.; Nakao, M.; Nam, J. W.; Natkaniec, Z.; Neichi, K.; Nishida, S.; Nitoh, O.; Noguchi, S.; Nozaki, T.; Ogawa, S.; Ohno, F.; Ohshima, T.; Okabe, T.; Okuno, S.; Olsen, S. L.; Ostrowicz, W.; Ozaki, H.; Pakhlov, P.; Pałka, H.; Park, C. S.; Park, C. W.; Park, H.; Park, K. S.; Peak, L. S.; Perroud, J. P.; Peters, M.; Piilonen, L. E.; Rodriguez, J. L.; Ronga, F. J.; Różańska, M.; Rybicki, K.; Sagawa, H.; Sakai, Y.; Satapathy, M.; Satpathy, A.; Schneider, O.; Schrenk, S.; Schwanda, C.; Semenov, S.; Senyo, K.; Sevior, M. E.; Shibuya, H.; Shwartz, B.; Sidorov, V.; Singh, J. B.; Stanič, S.; Sugi, A.; Sugiyama, A.; Sumisawa, K.; Sumiyoshi, T.; Suzuki, K.; Suzuki, S.; Suzuki, Shoji; Tajima, H.; Takahashi, T.; Takasaki, F.; Takita, M.; Tamai, K.; Tamura, N.; Tanaka, J.; Tanaka, M.; Taylor, G. N.; Teramoto, Y.; Tokuda, S.; Tomoto, M.; Tomura, T.; Tovey, S. N.; Trabelsi, K.; Tsuboyama, T.; Tsukamoto, T.; Uehara, S.; Ueno, K.; Unno, Y.; Uno, S.; Ushiroda, Y.; Varvell, K. E.; Wang, C. C.; Wang, C. H.; Wang, J. G.; Wang, M.-Z.; Watanabe, Y.; Won, E.; Yabsley, B.; Yamada, Y.; Yamaga, M.; Yamaguchi, A.; Yamamoto, H.; Yamashita, Y.; Yamauchi, M.; Yanaka, S.; Yashima, J.; Yokoyama, M.; Yuan, Y.; Yusa, Y.; Zhang, C. C.; Zhang, J.; Zheng, Y.; Zhilich, V.; Žontar, D.

doi:10.1103/physrevlett.88.171801

Cited by 19 publications

(3 citation statements)

References 10 publications

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“…Left: mixing frequency: BABAR exclusive hadronic measurement [64], BABAR dilepton measurement [65], Belle dilepton measurement [66], and the world average (PDG2002 [5]). Right: lifetime: BABAR exclusive hadronic measurement [50], BABAR inclusive D * measurement [67], Belle exclusive hadronic measurement [68], and world average (PDG2002 [5]).…”

Section: Significance Of This Resultsmentioning

confidence: 99%

A Study of Neutral B Meson Time Evolution Using Exclusively Reconstructed Semileptonic Decays

Meyer¹

2003

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I am grateful for the many gifts in my life. Earning a Ph.D. in Physics at Stanford is no exception, and I will take a moment here to pay my respects before I take the next fork in the road. I am proud of my connection to these people, and shout out my sincere thanks and praise with great enthusiasm.Pat -As a mentor and advisor she has been a constant source of support and inspiration, embodying the skills of creative vision and mindful observation. As a friend, she's been a model of balance, openness, and sincerity. David K -Everyone needs a guide when embarking on something unknown, and David has been that older brother, wiser colleague, and the slightly more sober drinking partner. Compassionate, genuine, and dedicated! Chris and Chih-Hsiang -My drinking buddies, especially when there wasn't even any alcohol around. Brilliant, talented, and good-natured.

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Section: Significance Of This Resultsmentioning

confidence: 99%

A Study of Neutral B Meson Time Evolution Using Exclusively Reconstructed Semileptonic Decays

Meyer¹

2003

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“…The results of this section are summarized in Table 11.6, which lists each source of systematic uncertainty and our evaluation of its contribution to the error on τ B 0 and ∆m d , and the sum in quadrature. [98,52,53,54,55,99,93,56]. The numbers in the parentheses are either the number of BB that particular experiment uses (e.g., 23 M), or the years the data are collected in (e.g., 91-00).…”

Section: Discussionmentioning

confidence: 99%

“…Since then, like time-dependent mixing measurements, experiments at LEP [52,53], SLD [54], Tevatron and B-factories [55,56] have significantly improved the precision.…”

Section: Lifetime Measurementsmentioning

confidence: 99%

A Measurement of the Lifetime and Mixing Frequency of Neutral B Mesons With Semileptonic Decays in the Babar Detector

Cheng¹

2003

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The neutral B meson, consisting of a b quark and an anti-d quark, can mix (oscillate) to its own anti-particle through second-order weak interactions. The measurement of the mixing frequency can constrain the quark mixing matrix in the Standard Model of particle physics. The PEP-II B-factory at the Stanford Linear Accelerator Center provides a very large data sample that enables us to make measurements with much higher precisions than previous measurements, and to probe physics beyond the Standard Model. The lifetime of the neutral B meson τ B 0 and the B 0-B 0 mixing frequency ∆m d are measured with a sample of approximately 14,000 exclusively reconstructed B 0 → D * − + ν signal events, selected from 23 million BB pairs recorded at the Υ(4S) resonance with the BABAR detector at the asymmetric-energy e + e − collider, PEP-II. The decay position of the exclusively reconstructed B is determined by the charged tracks in the final state, and its b-quark flavor at the time of decay is known unambiguously from the charge of the lepton. The decay position of the other B is determined inclusively, and its b-quark flavor at the time of decay is determined (tagged) with the charge of tracks in the final state, where identified leptons or kaons give the most information. The decay time difference of two B mesons in the event is calculated from the distance between their decay vertices and the Lorentz boost of the center of mass. Additional samples of approximately 50,000 events are selected for studies of background events. v The lifetime and mixing frequency, along with wrong-tag probabilities and the time-difference resolution function, are measured simultaneously with an unbinned maximum-likelihood fit that uses, for each event, the measured difference in B decay times (∆t), the calculated uncertainty on ∆t, the signal and background probabilities, and b-quark tagging for the other B meson. The results are τ B 0 = (1.523 +0.024 −0.023 ± 0.022) ps and ∆m d = (0.492 ± 0.018 ± 0.013) ps −1 , where the first error is statistical and the second is systematic. The statistical correlation coefficient between τ B 0 and ∆m d is −0.22. This result is consistent with the current world average values, the the total errors are comparable with other most-precise measurements. vi Acknowledgement As I put a period to my journey through graduate school, I would like to acknowledge the guidance and support of my adviser Pat Burchat. I would also like to thank David Kirkby for his always-ingenious suggestions and insight, Tim Meyer, and Chris Roat for their camaraderie in finishing this ambitious analysis and making my graduate life so enjoyable, and Chris LeClerc at U. C. Berkeley, who, with David and Tim, has contributed a great deal to this analysis. I would also like to thank Wouter Verkerke for providing an amazing fitting package and answering numerous questions.

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Measurement of Δmd with Belle

Ronga¹

2003

Proceedings of the 31st International Conference on High Energy Physics Ichep 2002

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Precise Measurement ofBMeson Lifetimes with Hadronic Decay Final States

Cited by 19 publications

References 10 publications

A Study of Neutral B Meson Time Evolution Using Exclusively Reconstructed Semileptonic Decays

A Study of Neutral B Meson Time Evolution Using Exclusively Reconstructed Semileptonic Decays

A Measurement of the Lifetime and Mixing Frequency of Neutral B Mesons With Semileptonic Decays in the Babar Detector

Measurement of Δmd with Belle

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