Measurement of the CKM angle $\varphi_1$ in $B^0\to\bar{D}{}^{(*)0}h^0$, $\bar{D}{}^0\to K_S^0\pi^+\pi^-$ decays with time-dependent binned Dalitz plot analysis

A. Bobrov; A. Bondar; A. Bozek; A. Chen; A. Drutskoy; A. Garmash; A. Ishikawa; A. J. Schwartz; A. M. Bakich; A. Moll

arxiv: 1607.05813 · v2 · pith:XCH2THTUnew · submitted 2016-07-20 · ✦ hep-ex · hep-ph

Measurement of the CKM angle φ₁ in B⁰tobar{D}{}^((*)0)h⁰, bar{D}{}⁰to K_S⁰π^+π^- decays with time-dependent binned Dalitz plot analysis

Belle Collaboration: V. Vorobyev , I. Adachi , H. Aihara , D. M. Asner , T. Aushev , R. Ayad , I. Badhrees , S. Bahinipati

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A. M. Bakich P. Behera V. Bhardwaj B. Bhuyan J. Biswal A. Bobrov A. Bondar A. Bozek M. Bra\v{c}ko T. E. Browder D. \v{C}ervenkov V. Chekelian A. Chen B. G. Cheon K. Chilikin R. Chistov K. Cho V. Chobanova Y. Choi D. Cinabro M. Danilov N. Dash S. Di Carlo Z. Dole\v{z}al Z. Dr\'asal A. Drutskoy D. Dutta S. Eidelman D. Epifanov H. Farhat J. E. Fast T. Ferber B. G. Fulsom V. Gaur N. Gabyshev A. Garmash P. Goldenzweig D. Greenwald J. Haba K. Hayasaka H. Hayashii W.-S. Hou K. Inami G. Inguglia A. Ishikawa R. Itoh Y. Iwasaki W. W. Jacobs I. Jaegle D. Joffe K. K. Joo T. Julius K. H. Kang C. Kiesling D. Y. Kim H. J. Kim J. B. Kim K. T. Kim S. H. Kim K. Kinoshita P. Kody\v{s} D. Kotchetkov P. Kri\v{z}an P. Krokovny R. Kumar T. Kumita Y.-J. Kwon J. S. Lange C. H. Li H. Li L. Li Y. Li J. Libby D. Liventsev M. Lubej M. Masuda T. Matsuda D. Matvienko K. Miyabayashi H. Miyata R. Mizuk G. B. Mohanty A. Moll H. K. Moon R. Mussa M. Nakao T. Nanut K. J. Nath M. Nayak K. Negishi S. Nishida S. Ogawa S. Okuno P. Pakhlov G. Pakhlova B. Pal C.-S. Park C. W. Park H. Park S. Paul T. K. Pedlar R. Pestotnik M. Petri\v{c} L. E. Piilonen J. Rauch M. Ritter Y. Sakai S. Sandilya T. Sanuki V. Savinov T. Schl\"uter O. Schneider G. Schnell C. Schwanda A. J. Schwartz Y. Seino K. Senyo M. E. Sevior V. Shebalin C. P. Shen T.-A. Shibata J.-G. Shiu B. Shwartz F. Simon A. Sokolov E. Solovieva M. Stari\v{c} J. F. Strube T. Sumiyoshi M. Takizawa F. Tenchini K. Trabelsi M. Uchida T. Uglov S. Uno P. Urquijo Y. Usov C. Van Hulse P. Vanhoefer G. Varner K. E. Varvell A. Vinokurova C. H. Wang M.-Z. Wang P. Wang Y. Watanabe K. M. Williams E. Won J. Yamaoka Y. Yamashita S. Yashchenko J. Yelton Z. P. Zhang V. Zhilich V. Zhukova V. Zhulanov A. Zupanc

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keywords varphicircmeasurementstatsystanalysisbinneddalitz

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We report a measurement of the CP violation parameter $\varphi_1$ obtained in a time-dependent analysis of $B^0\to\bar{D}{}^{(*)0}h^0$ decays followed by $\bar{D}{}^0\to K_S^0\pi^+\pi^-$ decay. A model-independent measurement is performed using the binned Dalitz plot technique. The measured value is $\varphi_1 = 11.7^{\circ}\pm7.8^{\circ}({\rm stat.})\pm 2.1^{\circ}({\rm syst.})$. Treating $\sin{2\varphi_1}$ and $\cos{2\varphi_1}$ as independent parameters, we obtain $\sin{2\varphi_1} = 0.43\pm 0.27({\rm stat.})\pm 0.08({\rm syst.})$ and $\cos{2\varphi_1} = 1.06\pm 0.33({\rm stat.})^{+0.21}_{-0.15}({\rm syst.})$. The results are obtained with a full data sample of $772 \times 10^6 B\bar{B}$ pairs collected near the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider.

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