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Chao Wang

Cette personne a quitté l’EPFL

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Publications associées (361)

Page 4 sur 19

Study of B̄0→D0π+π- decays

Mingkui Wang, Olivier Schneider, Chao Wang, Lei Zhang, Aurelio Bay, Vladislav Balagura

We report the results of a study of neutral B meson decays to the D0π+π- final state, where the D0 is fully reconstructed. The results are obtained from an event sample containing 388×106 BB̄-meson pairs collected in the Belle experiment at the KEKB e+e- c ...

American Physical Society2007

Search for the process e(+)e(-) -> J/psi X(1835) at root s approximate to 10.6 GeV

Jian Wang, Olivier Schneider, Chao Wang

We report the results of a search for the X(1835) state in the process e(+)e(-) -> J/psi X(1835) using a data sample of 672 fb(-1) collected with the Belle detector at and near the Upsilon(4S) resonance at the KEKB asymmetric-energy e(+)e(-) collider. No s ...

American Physical Society2014

Evidence for the eta(b)(2S) and Observation of h(b)(1P) -> eta(b)(1S)gamma and h(b)(2P) -> eta(b)(1S)gamma

Mingkui Wang, Olivier Schneider, Chao Wang, Aurelio Bay, Remi Léandre Albert Louvot

We report the first evidence for the eta(b)(2S) using the h(b)(2P) -> eta(b)(2S)gamma transition and the first observation of the h(b)(1P) -> eta(b)(1S)gamma and h(b)(2P) -> eta(b)(1S)gamma transitions. The mass and width of the eta(b)(1S) and eta(b)(2S) a ...

American Physical Society (APS)2012

Search for b→h(*)νν̄ decays at belle

Mingkui Wang, Olivier Schneider, Chao Wang, Aurelio Bay, Vladislav Balagura, Stewart Cole

We present a search for the rare decays B→h()νν̄, where h() stands for a light meson. A data sample of 535×106 BB̄ pairs collected with the Belle detector at the KEKB e+e- collider is used. Signal candidates are required to have an accompanying B meson f ...

2007

Search for B- -> mu(-)(nu)over-bar(mu) Decays at the Belle Experiment

Mingkui Wang, Olivier Schneider, Chao Wang, Sun Hee Kim, Tara Nanut, Jun Yong Kim, Chang-Hyun Park, Seyed Sina Mirrazavi Salehian, Joo Yeon Kim, Timothy Chi Hin Liew, Yong Chan Choi, Martin Lubej, Wondwossen Wubie Eshetu, Johannes Julius Thomas Marinus Swartjes, Takayuki Yamashita

We report the results of a search for the rare, purely leptonic decay B- -> mu(-)(nu) over bar (mu) performed with a 711 fb(-1) data sample that contains 772 x 10(6) B (B) over bar pairs, collected near the Upsilon(4S) resonance with the Belle detector at ...

2018

Study of B -> ppi pi

Mingkui Wang, Olivier Schneider, Chao Wang, Sun Hee Kim

Using a data sample of 772 x 10(6) B (B) over bar pairs collected on the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric energy e(+)e(-) collider, we report the observation of B-0 -> p (p) over bar pi(+)pi(-) and the first observation ...

American Physical Society2020

Observation of B+ -> (D)over-bar*(0)tau(+) v(tau) and evidence for B+ -> (D)over-bar(0)tau(+) v(tau) at Belle

Mingkui Wang, Olivier Schneider, Chao Wang, Sun Hee Kim, Remi Léandre Albert Louvot

We present measurements of B+ -> (D) over bar*(0)tau(+) v(tau) and B+ -> (D) over bar (0)tau(+) v(tau) decays in a data sample of 657 x 10(6) B (B) over bar pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We find 44 ...

American Physical Society2010

Evidence of a J/psi Lambda structure and observation of excited Xi(-) states in the Xi(-)(b) -> J/psi Lambda K- decay

Jian Wang, Mingkui Wang, Olivier Schneider, Zhirui Xu, Chao Wang, Yiming Li, Yi Zhang, Lei Zhang, Yi Wang, Aurelio Bay, Ho Ling Li, Guido Haefeli, Tatsuya Nakada, Christoph Frei, Mark Tobin, Frédéric Blanc, Maurizio Martinelli, Vladislav Balagura, Liang Sun, Lesya Shchutska, François Fleuret, Liupan An, Renato Quagliani, Maxime Schubiger, Hang Yin, Preema Rennee Pais, Aravindhan Venkateswaran, Elena Graverini, Michel De Cian, Vladimir Macko, Federico Leo Redi, Sebastian Schulte, Tommaso Colombo, Donal Patrick Hill, Vitalii Lisovskyi, Tara Nanut, Minh Tâm Tran, Violaine Bellée, Guillaume Max Pietrzyk, Pavol Stefko, Pietro Marino, Maria Vieites Diaz, Marie Theres Christin Bachmayer, Lino Ferreira Lopes, Matthieu Philippe Luther Marinangeli, Serhii Cholak, Veronica Sølund Kirsebom, Ettore Zaffaroni, Maria Elena Stramaglia, Surapat Ek-In, Ana Bárbara Rodrigues Cavalcante, Sara Celani, Katharina Müller, Carina Trippl, Arnout Lodewijk M Beckers, Sonia Amina Bouchiba, Thi Dung Nguyen, Maxim Karpov, Alison Maria Tully, Mâu Chung Nguyên, Maarten Willibrord Uriël Van Dijk, Simone Meloni, Xiaoqing Zhou, Elisabeth Maria Niel, Alexandre Brea Rodriguez, Marco Guarise

First evidence of a structure in the J/psi Lambda invariant mass distribution is obtained from an amplitude analysis of Xi(-)(b) -> J/psi Lambda K- decays. The observed structure is consistent with being due to a charmonium pentaquark with strangeness with ...

2021

Observation of a new charged charmoniumlike state in B-0 -> J/psi K- pi(+) decays

Mingkui Wang, Olivier Schneider, Chao Wang, Yiming Li, Tara Nanut

We present the results of an amplitude analysis of B-0 --> J/psi K- pi(+) decays. A new charged charmoniumlike state Z(c)(4200)(+) decaying to J/psi pi(+) is observed with a significance of 6.2 sigma. The mass and width of the Z(c)(4200)(+) are 4196(-29-13 ...

American Physical Society2014

Search for Bottomonium States in Exclusive Radiative gamma(2S) Decays

Mingkui Wang, Olivier Schneider, Chao Wang, Yiming Li, Jun Yong Kim

We search for bottomonium states in gamma(2S) -> (b (b) over bar)gamma decays with an integrated luminosity of 24.7 fb(-1) recorded at the gamma(2S) resonance with the Belle detector at KEK, containing (157.8 +/- 3.6) x 10(6) gamma(2S) events. The (b (b) o ...

Amer Physical Soc2013

Measurement of the Direct CP Asymmetry in over-bar & RARR; gamma; Decays with a Lepton Tag

Mingkui Wang, Olivier Schneider, Chao Wang, Yiming Li, Sun Hee Kim, Tara Nanut, Jun Yong Kim

We report the measurement of the direct CP asymmetry in the radiative (B) over bar -> Xs+d gamma decay using a data sample of (772 +/- 11) x 10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-en ...

Amer Physical Soc2015

Spatial inhomogeneity in RFeAsO1-xFx (R = Pr, Nd) determined from rare-earth crystal-field excitations

Chao Wang, Henrik Moodysson Rønnow

We report inelastic neutron-scattering measurements of crystal-field transitions in PrFeAsO, PrFeAsO0.87F0.13, and NdFeAsO0.85F0.15. Doping with fluorine produces additional crystal-field excitations, providing evidence that there are two distinct charge e ...

2011

Search for lepton and baryon number violating τ- decays into Λ̄π- and Λπ-

Olivier Schneider, Chao Wang, Lei Zhang, Vladislav Balagura, Stewart Cole, Sun Hee Kim

We have searched for τ lepton decays, τ-→Λ̄π- and τ-→Λπ-, that simultaneously violate the conservation of the lepton (L) and baryon (B) number using a data sample of 154 fb-1 collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. No ...

2006

Search for light tetraquark states in Upsilon(1S) and Upsilon(2S) decays

Olivier Schneider, Yiming Li, Mingkui Wang, Chao Wang, Sun Hee Kim, Tara Nanut, Jun Yong Kim

We search for the J(PC) = 0(--) and 1(+-) light tetraquark states with masses up to 2.46 GeV/c(2) in gamma(1S) and gamma(2S) decays with data samples of (102 +/- 2) million and (158 +/- 4) million events, respectively, collected with the Belle detector. No ...

American Physical Society2017

Measurement of the W gamma Production Cross Section in Proton-Proton Collisions at root s=13 TeV and Constraints on Effective Field Theory Coefficients

Jian Wang, Matthias Finger, Qian Wang, Chao Wang, Yiming Li, João Miguel das Neves Duarte, Matthias Wolf, Varun Sharma, Yi Zhang, Tian Cheng, Yixing Chen, Alexis Kalogeropoulos, Ioannis Papadopoulos, Yi Wang, Ekaterina Kuznetsova, Hua Zhang, Siyuan Wang, Jessica Prisciandaro, Peter Hansen, Xin Chen, Michele Bianco, Sebastiana Gianì, Davide Di Croce, Arvind Shah, Wei Sun, Jian Zhao, Rakesh Chawla, Jan Steggemann, Konstantin Androsov, Federica Legger, Doohyun Kim, Bertrand François, Bandeep Singh

A fiducial cross section for W gamma production in proton-proton collisions is measured at a center-of-mass energy of 13 TeV in 137 fb(-1) of data collected using the CMS detector at the LHC. The W -> e nu and mu nu decay modes are used in a maximum-likeli ...

2021

Measurement of the decays B -> eta lv(l) and B -> eta ' lv(l) in fully reconstructed events at Belle

Olivier Schneider, Yiming Li, Mingkui Wang, Chao Wang, Tara Nanut, Jun Yong Kim

We report branching fraction measurements of the decays B+ -> eta l(+)v(l) and B+ -> eta'l(+)v(l) based on 711 fb(-1) of data collected near the (sic)(4S) resonance with the Belle experiment at the KEKB asymmetric-energy e(+)e(-) collider. This data sample ...

American Physical Society2017

Search for lepton-number-violating B+ -> D- l+ l'+ decays

Mingkui Wang, Olivier Schneider, Chao Wang, Yiming Li, Aurelio Bay, Sun Hee Kim, Jun Yong Kim, Remi Léandre Albert Louvot

We perform the first search for lepton-number-violating B+ -> D(-)l(+)l'(+) decays, where l and l' stand for e or mu, using 772 x 10(6) B (B) over bar pairs accumulated at the Y(4S) resonance with the Belle detector at the KEKB e(+)e(-) collider. No eviden ...

American Physical Society2011

Search for lepton flavor violating τ- decays with a KS 0 meson

Olivier Schneider, Chao Wang, Lei Zhang, Stewart Cole

We have searched for the lepton flavor violating decays τ- → ℓ- KS 0 (ℓ = e or μ), using a data sample of 281 fb-1 collected with the Belle detector at the KEKB e+ e- asymmetric-energy collider. No evidence for a signal was found in either of the decay mod ...

2006

Studies of charmed strange baryons in the Lambda D final state at Belle

Olivier Schneider, Chao Wang, Yiming Li, Ho Ling Li, Sun Hee Kim, Tara Nanut, Jun Yong Kim

We report the discovery of Xi(c)(3055)(0), observed by its decay into the final-state Lambda D-0, and present the first observation and evidence of the decays of Xi(c)(3055)(+) and Xi(c)(3080)(+) into Lambda D+. We also perform a combined analysis of the L ...

American Physical Society2016

Search for lepton flavor violating τ- decays into ℓ- η, ℓ- η′ and ℓ- π0

Olivier Schneider, Chao Wang, Aurelio Bay

We have searched for lepton-flavor-violating τ decays with a pseudoscalar meson (η, η′ and π0) using a data sample of 401 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. No evidence for these decays is found and we set ...

2007