Measurement of C P Violation in B 0 → K S 0 π 0 Decays at Belle II

Adachi, I.; Adamczyk, K.; Aggarwal, L.; Ahmed, H.; Aihara, H.; Akopov, N.; Aloisio, A.; Anh Ky, N.; Asner, D. M.; Atmacan, H.; Aushev, T.; Aushev, V.; Aversano, M.; Babu, V.; Bae, H.; Bahinipati, S.; Bambade, P.; Banerjee, Sw.; Barrett, M.; Baudot, J.; Bauer, M.; Baur, A.; Beaubien, A.; Becker, J.; Behera, P. K.; Bennett, J. V.; Bertacchi, V.; Bertemes, M.; Bertholet, E.; Bessner, M.; Bettarini, S.; Bhuyan, B.; Bianchi, F.; Bilka, T.; Biswas, D.; Bodrov, D.; Bondar, A.; Borah, J.; Bozek, A.; Bračko, M.; Branchini, P.; Briere, R. A.; Browder, T. E.; Budano, A.; Bussino, S.; Campajola, M.; Cao, L.; Casarosa, G.; Cecchi, C.; Cerasoli, J.; Chang, P.; Cheaib, R.; Cheema, P.; Chekelian, V.; Chen, C.; Cheon, B. G.; Chilikin, K.; Chirapatpimol, K.; Cho, H. -E.; Cho, K.; Cho, S. -J.; Choi, S. -K.; Choudhury, S.; Cochran, J.; Corona, L.; Cremaldi, L. M.; Das, S.; Dattola, F.; De La Cruz-Burelo, E.; De La Motte, S. A.; de Marino, G.; De Nuccio, M.; De Pietro, G.; de Sangro, R.; Destefanis, M.; De Yta-Hernandez, A.; Dhamija, R.; Di Canto, A.; Di Capua, F.; Dingfelder, J.; Doležal, Z.; Domínguez Jiménez, I.; Dong, T. V.; Dorigo, M.; Dort, K.; Dreyer, S.; Dubey, S.; Dujany, G.; Ecker, P.; Eliachevitch, M.; Feichtinger, P.; Ferber, T.; Ferlewicz, D.; Fillinger, T.; Finck, C.; Finocchiaro, G.; Fodor, A.; Forti, F.; Fulsom, B. G.; Gabrielli, A.; Ganiev, E.; Garcia-Hernandez, M.; Garg, R.; Garmash, A.; Gaudino, G.; Gaur, V.; Gaz, A.; Gellrich, A.; Ghosh, D.; Giakoustidis, G.; Giordano, R.; Giri, A.; Glazov, A.; Gobbo, B.; Godang, R.; Goldenzweig, P.; Gradl, W.; Grammatico, T.; Granderath, S.; Graziani, E.; Greenwald, D.; Gruberová, Z.; Gu, T.; Guan, Y.; Gudkova, K.; Halder, S.; Han, Y.; Hara, K.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hazra, S.; Hearty, C.; Hedges, M. T.; Heredia de la Cruz, I.; Hernández Villanueva, M.; Hershenhorn, A.; Higuchi, T.; Hill, E. C.; Hoek, M.; Hohmann, M.; Hsu, C. -L.; Humair, T.; Iijima, T.; Inami, K.; Ipsita, N.; Ishikawa, A.; Ito, S.; Itoh, R.; Iwasaki, M.; Jackson, P.; Jacobs, W. W.; Jang, E. -J.; Ji, Q. P.; Jia, S.; Jin, Y.; Johnson, A.; Joo, K. K.; Junkerkalefeld, H.; Kaleta, M.; Kaliyar, A. B.; Kandra, J.; Kang, K. H.; Kang, S.; Kar, S.; Karyan, G.; Kawasaki, T.; Keil, F.; Ketter, C.; Kiesling, C.; Kim, C. -H.; Kim, D. Y.; Kim, K. -H.; Kim, Y. -K.; Kindo, H.; Kodyš, P.; Koga, T.; Kohani, S.; Kojima, K.; Korobov, A.; Korpar, S.; Kovalenko, E.; Kowalewski, R.; Kraetzschmar, T. M. G.; Križan, P.; Krokovny, P.; Kuhr, T.; Kumar, J.; Kumar, M.; Kumara, K.; Kunigo, T.; Kuzmin, A.; Kwon, Y. -J.; Lacaprara, S.; Lai, Y. -T.; Lam, T.; Lange, J. S.; Laurenza, M.; Leboucher, R.; Le Diberder, F. R.; Leitl, P.; Levit, D.; Li, C.; Li, L. K.; Libby, J.; Liu, Q. Y.; Liu, Z. Q.; Liventsev, D.; Longo, S.; Lueck, T.; Luo, T.; Lyu, C.; Ma, Y.; Maggiora, M.; Maharana, S. P.; Maiti, R.; Maity, S.; Mancinelli, G.; Manfredi, R.; Manoni, E.; Mantovano, M.; Marcantonio, D.; Marcello, S.; Marinas, C.; Martel, L.; Martellini, C.; Martinov, T.; Massaccesi, L.; Masuda, M.; Matsuda, T.; Matsuoka, K.; Matvienko, D.; Maurya, S. K.; McKenna, J. A.; Mehta, R.; Meier, F.; Merola, M.; Metzner, F.; Milesi, M.; Miller, C.; Mirra, M.; Miyabayashi, K.; Mizuk, R.; Mohanty, G. B.; Molina-Gonzalez, N.; Mondal, S.; Moneta, S.; Moser, H. -G.; Mrvar, M.; Mussa, R.; Nakamura, I.; Nakazawa, Y.; Narimani Charan, A.; Naruki, M.; Natochii, A.; Nayak, L.; Nayak, M.; Nazaryan, G.; Nisar, N. K.; Nishida, S.; Ono, H.; Onuki, Y.; Oskin, P.; Pakhlov, P.; Pakhlova, G.; Paladino, A.; Paoloni, E.; Pardi, S.; Parham, K.; Park, H.; Park, S. -H.; Passeri, A.; Patra, S.; Paul, S.; Pedlar, T. K.; Peschke, R.; Pestotnik, R.; Pham, F.; Piccolo, M.; Piilonen, L. E.; Podesta-Lerma, P. L. M.; Podobnik, T.; Pokharel, S.; Praz, C.; Prell, S.; Prencipe, E.; Prim, M. T.; Purwar, H.; Rad, N.; Rados, P.; Raeuber, G.; Raiz, S.; Reif, M.; Reiter, S.; Remnev, M.; Ripp-Baudot, I.; Rizzo, G.; Robertson, S. H.; Roehrken, M.; Roney, J. M.; Rostomyan, A.; Rout, N.; Russo, G.; Sahoo, D.; Sandilya, S.; Sangal, A.; Santelj, L.; Sato, Y.; Savinov, V.; Scavino, B.; Schmitt, C.; Schwanda, C.; Schwartz, A. J.; Seino, Y.; Selce, A.; Senyo, K.; Serrano, J.; Sevior, M. E.; Sfienti, C.; Shan, W.; Sharma, C.; Shi, X. D.; Shillington, T.; Shiu, J. -G.; Shtol, D.; Sibidanov, A.; Simon, F.; Singh, J. B.; Skorupa, J.; Sobie, R. J.; Sobotzik, M.; Soffer, A.; Sokolov, A.; Solovieva, E.; Spataro, S.; Spruck, B.; Starič, M.; Stavroulakis, P.; Stefkova, S.; Stottler, Z. S.; Stroili, R.; Sumihama, M.; Sumisawa, K.; Sutcliffe, W.; Svidras, H.; Takahashi, M.; Takizawa, M.; Tamponi, U.; Tanaka, S.; Tanida, K.; Tenchini, F.; Thaller, A.; Tittel, O.; Tiwary, R.; Tonelli, D.; Torassa, E.; Trabelsi, K.; Tsaklidis, I.; Uchida, M.; Ueda, I.; Uglov, T.; Unger, K.; Unno, Y.; Uno, K.; Uno, S.; Urquijo, P.; Ushiroda, Y.; Vahsen, S. E.; van Tonder, R.; Varner, G. S.; Varvell, K. E.; Vinokurova, A.; Vismaya, V. S.; Vitale, L.; Wach, B.; Wakai, M.; Wakeling, H. M.; Wallner, S.; Wang, E.; Wang, M. -Z.; Wang, Z.; Warburton, A.; Watanabe, M.; Watanuki, S.; Welsch, M.; Wessel, C.; Won, E.; Xu, X. P.; Yabsley, B. D.; Yamada, S.; Yan, W.; Yang, S. B.; Yin, J. H.; Yoshihara, K.; Yuan, C. Z.; Yusa, Y.; Zani, L.; Zhang, Y.; Zhilich, V.; Zhou, Q. D.; Zhukova, V. I.

doi:10.1103/PhysRevLett.131.111803

Measurement of $C P$ Violation in $B^{0} \to K_{S}^{0} π^{0}$ Decays at Belle II

Journal Article · Thu Sep 14 00:00:00 EDT 2023 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.131.111803· OSTI ID:2472659

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We report a measurement of the $C P$ -violating parameters $C$ and $S$ in $B^{0} \to K_{S}^{0} π^{0}$ decays at Belle II using a sample of $387 \times 10^{6} B \bar{B}$ events recorded in $e^{+} e^{-}$ collisions at a center-of-mass energy corresponding to the $ϒ (4 S)$ resonance. These parameters are determined by fitting the proper decay-time distribution of a sample of 415 signal events. We obtain $C = - 0.0 4_{- 0.15}^{+ 0.14} \pm 0.05$ and $S = 0.7 5_{- 0.23}^{+ 0.20} \pm 0.04$ , where the first uncertainties are statistical and the second are systematic.

Published by the American Physical Society 2023

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Research Organization:: Battelle Memorial Institute, Columbus, OH (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States); Duke Univ., Durham, NC (United States); Univ. of Cincinnati, OH (United States); Univ. of Florida, Gainesville, FL (United States); Univ. of Hawaii, Honolulu, HI (United States); Univ. of Louisville, KY (United States); Univ. of Mississippi, Oxford, MS (United States); Univ. of South Alabama, Mobile, AL (United States); Univ. of South Carolina, Columbia, SC (United States); Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States); Wayne State Univ., Detroit, MI (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE; USDOE Office of Science (SC)

Contributing Organization:: Belle II Collaboration

Grant/Contract Number:: AC06-76RL01830; SC0007983; SC0009824; SC0009973; SC0010007; SC0010073; SC0010118; SC0010504; SC0011784; SC0012704; SC0019230; SC0021274; SC0022350; SC0023470

OSTI ID:: 2472659

Alternate ID(s):: OSTI ID: 2419785

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 11 Vol. 131; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

References (36)

The Belle II Core Software: Belle II Framework Software Group Kuhr, T.; Pulvermacher, C.; Ritter, M. Computing and Software for Big Science, Vol. 3, Issue 1 https://doi.org/10.1007/s41781-018-0017-9	journal	November 2018
Photos — a universal Monte Carlo for QED radiative corrections in decays Barberio, Elisabetta; van Eijk, Bob; Wa̧s, Zbigniew Computer Physics Communications, Vol. 66, Issue 1 https://doi.org/10.1016/0010-4655(91)90012-A	journal	July 1991
The principal axis of jets — an attempt to analyse high-energy collisions as two-body processes Brandt, S.; Peyrou, Ch.; Sosnowski, R. Physics Letters, Vol. 12, Issue 1 https://doi.org/10.1016/0031-9163(64)91176-X	journal	September 1964
Search for hadronic b→u decays Albrecht, H.; Gläser, R.; Harder, G. Physics Letters B, Vol. 241, Issue 2 https://doi.org/10.1016/0370-2693(90)91293-K	journal	May 1990
Kernel estimation in high-energy physics Cranmer, Kyle Computer Physics Communications, Vol. 136, Issue 3 https://doi.org/10.1016/S0010-4655(00)00243-5	journal	May 2001
The EvtGen particle decay simulation package Lange, David J. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 462, Issue 1-2 https://doi.org/10.1016/S0168-9002(01)00089-4	journal	April 2001
Geant4—a simulation toolkit Agostinelli, S.; Allison, J.; Amako, K. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3 https://doi.org/10.1016/S0168-9002(03)01368-8	journal	July 2003
CP asymmetries in B decays with new physics in decay amplitudes Grossman, Yuval; Worah, Mihir P. Physics Letters B, Vol. 395, Issue 3-4 https://doi.org/10.1016/S0370-2693(97)00068-3	journal	March 1997
Measuring the CP angle β in hadronic b → s penguin decays London, David; Soni, Amarjit Physics Letters B, Vol. 407, Issue 1 https://doi.org/10.1016/S0370-2693(97)00695-3	journal	August 1997
Precision calculation for e+e− → 2f: the KK MC project Ward, B. F. L.; Jadach, S.; Was, Z. Nuclear Physics B - Proceedings Supplements, Vol. 116 https://doi.org/10.1016/S0920-5632(03)80147-0	journal	March 2003
A brief introduction to PYTHIA 8.1 Sjöstrand, Torbjörn; Mrenna, Stephen; Skands, Peter Computer Physics Communications, Vol. 178, Issue 11 https://doi.org/10.1016/j.cpc.2008.01.036	journal	June 2008
: A statistical tool to unfold data distributions Pivk, M.; Le Diberder, F. R. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 555, Issue 1-2 https://doi.org/10.1016/j.nima.2005.08.106	journal	December 2005
SuperKEKB collider Akai, Kazunori; Furukawa, Kazuro; Koiso, Haruyo Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 907 https://doi.org/10.1016/j.nima.2018.08.017	journal	November 2018
QCD factorization for B→PP and B→PV decays Beneke, Martin; Neubert, Matthias Nuclear Physics B, Vol. 675, Issue 1-2 https://doi.org/10.1016/j.nuclphysb.2003.09.026	journal	December 2003
Correlated bounds on CP asymmetries in B0→η′KS Gronau, Michael; Rosner, Jonathan L.; Zupan, Jure Physics Letters B, Vol. 596, Issue 1-2 https://doi.org/10.1016/j.physletb.2004.06.086	journal	August 2004
Corrections to sin(2β) from CP asymmetries in B0→(π0,ρ0,η,η′,ω,ϕ)KS decays Beneke, M. Physics Letters B, Vol. 620, Issue 3-4 https://doi.org/10.1016/j.physletb.2005.06.045	journal	August 2005
Towards new frontiers with B → πK decays Fleischer, Robert; Jaarsma, Ruben; Vos, K. Keri Physics Letters B, Vol. 785 https://doi.org/10.1016/j.physletb.2018.09.015	journal	October 2018
Charmless two-body B meson decays in the perturbative QCD factorization approach* Chai, Jian; Cheng, Shan; Ju, Yao-hui Chinese Physics C, Vol. 46, Issue 12 https://doi.org/10.1088/1674-1137/ac88bd	journal	December 2022
The design, construction, operation and performance of the Belle II silicon vertex detector Adamczyk, K.; Aggarwal, L.; Aihara, H. Journal of Instrumentation, Vol. 17, Issue 11 https://doi.org/10.1088/1748-0221/17/11/P11042	journal	November 2022
Review of Particle Physics No authors listed Progress of Theoretical and Experimental Physics, Vol. 2022, Issue 8 https://doi.org/10.1093/ptep/ptac097	journal	August 2022
The Belle II Physics Book Kou, E.; Urquijo, P.; Altmannshofer, W. Progress of Theoretical and Experimental Physics, Vol. 2019, Issue 12 https://doi.org/10.1093/ptep/ptz106	journal	December 2019
Averages of b -hadron, c -hadron, and τ -lepton properties as of 2021 Amhis, Y.; Banerjee, Sw.; Ben-Haim, E. Physical Review D, Vol. 107, Issue 5 https://doi.org/10.1103/PhysRevD.107.052008	journal	March 2023
Measurement of the B+/B0 production ratio in e+e− collisions at the ϒ(4S) resonance using B→J/ψ(ℓℓ)K decays at Belle Choudhury, S.; Sandilya, S.; Trabelsi, K. Physical Review D, Vol. 107, Issue 3 https://doi.org/10.1103/PhysRevD.107.L031102	journal	February 2023
Search for exclusive charmless hadronic B decays Asner, D. M.; Athanas, M.; Bliss, D. W. Physical Review D, Vol. 53, Issue 3 https://doi.org/10.1103/PhysRevD.53.1039	journal	February 1996
SU(3) relations and the CP asymmetries in B decays to η ′ K S , φ K S , and K + K − K S Grossman, Yuval; Ligeti, Zoltan; Nir, Yosef Physical Review D, Vol. 68, Issue 1 https://doi.org/10.1103/PhysRevD.68.015004	journal	July 2003
Impact of tag-side interference on time-dependent CP asymmetry measurements using coherent B 0 B 0 pairs Long, Owen; Baak, Max; Cahn, Robert N. Physical Review D, Vol. 68, Issue 3 https://doi.org/10.1103/PhysRevD.68.034010	journal	August 2003
Two-body charmless B decays involving η and η ′ Chiang, Cheng-Wei; Gronau, Michael; Rosner, Jonathan L. Physical Review D, Vol. 68, Issue 7 https://doi.org/10.1103/PhysRevD.68.074012	journal	October 2003
Updated bounds on C P asymmetries in B 0 → η ′ K S and B 0 → π 0 K S Gronau, Michael; Rosner, Jonathan L.; Zupan, Zure Physical Review D, Vol. 74, Issue 9 https://doi.org/10.1103/PhysRevD.74.093003	journal	November 2006
Measurement of time dependent C P asymmetry parameters in B 0 meson decays to ω K S 0 , η ′ K 0 , and π 0 K S 0 Aubert, B.; Bona, M.; Karyotakis, Y. Physical Review D, Vol. 79, Issue 5 https://doi.org/10.1103/PhysRevD.79.052003	journal	March 2009
Measurement of C P asymmetries in B 0 → K 0 π 0 decays Fujikawa, M.; Yusa, Y.; Dalseno, J. Physical Review D, Vol. 81, Issue 1 https://doi.org/10.1103/PhysRevD.81.011101	journal	January 2010
Unitary Symmetry and Leptonic Decays Cabibbo, Nicola Physical Review Letters, Vol. 10, Issue 12 https://doi.org/10.1103/PhysRevLett.10.531	journal	June 1963
Precise Measurement of the D0 and D+ Lifetimes at Belle II Abudinén, F.; Adachi, I.; Adamczyk, K. Physical Review Letters, Vol. 127, Issue 21 https://doi.org/10.1103/PhysRevLett.127.211801	journal	November 2021
Quantum Chromodynamics Test for Jets Farhi, Edward Physical Review Letters, Vol. 39, Issue 25 https://doi.org/10.1103/PhysRevLett.39.1587	journal	December 1977
Observables for the Analysis of Event Shapes in e + e − Annihilation and Other Processes Fox, Geoffrey C.; Wolfram, Stephen Physical Review Letters, Vol. 41, Issue 23 https://doi.org/10.1103/PhysRevLett.41.1581	journal	December 1978
B-flavor tagging at Belle II Abudinén, F.; Akopov, N.; Aloisio, A. The European Physical Journal C, Vol. 82, Issue 4 https://doi.org/10.1140/epjc/s10052-022-10180-9	journal	April 2022
C P -Violation in the Renormalizable Theory of Weak Interaction Kobayashi, Makoto; Maskawa, Toshihide Progress of Theoretical Physics, Vol. 49, Issue 2 https://doi.org/10.1143/PTP.49.652	journal	February 1973

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