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Probing Charge-Symmetry-Violating Quark Distributions in Semi-Inclusive Leptoproduction of Hadrons

Recent experiments by the HERMES group at HERA are measuring semi-inclusive electroproduction of pions from deuterium. We point out that by comparing the production of $\pi^+$ and $\pi^-$ from an isoscalar target, it is possible, in…

High Energy Physics - Phenomenology · Physics 2010-02-17 J. T. Londergan , Alex Pang , A. W. Thomas

New results from the B factories Belle and BaBar

The BELLE detector has already accumulated e^+ e^- collision data at the KEKB-collider corresponding to 600 fb^-1. BaBar has accumulated data of approximately 390 fb^-1 at PEP-II. Both are running on asymmetric energy e^+ e^- colliders at…

High Energy Physics - Experiment · Physics 2019-08-13 G. Leder

YSF Measurement of the shape of the $\mathrm{b}$ quark fragmentation function using charmed mesons produced inside $\mathrm{b}$ jets from $\mathrm{t\overline{t}}$ decays

A first measurement of the $\mathrm{b}$ quark fragmentation function at the LHC is presented. Charmed meson candidates produced via semi-leptonic $\mathrm{t\overline{t}}$ decays ($\mathrm{t} \to \mathrm{b}\mathrm{W} \to$ b-jet $\ell \nu$)…

High Energy Physics - Experiment · Physics 2022-01-25 Brent R. Yates

Balance functions of charged hadron pairs $(\pi,K,p)\otimes (\pi,K,p)$ in Pb--Pb collisions at $\sqrt{s_{_{\rm NN}}} =$2.76 TeV

We present the first balance function (BF) measurement of charged hadron pairs $(\pi,K,p)\otimes (\pi,K,p)$ in Pb--Pb collisions at $\sqrt{s_{_{\rm NN}}} =$2.76 TeV. The BF measurements are carried out as two-dimensional (2D) differential…

Nuclear Experiment · Physics 2019-11-07 Jinjin Pan

Measurement of Branching Fractions in B0 -> J/Psi pi+pi- Decay

We report a measurement of the branching fractions in the B0->J/Psi pi+pi- decay based on a 140/fb data sample collected at the Upsilon(4S) energy with the Belle detector at the KEKB e+e- collider. Charged pion pairs are found to arise…

High Energy Physics - Experiment · Physics 2019-08-14 K. Abe

$\Lambda$ polarizing fragmentation function from Belle $e^+e^-$ data

Experimental data from Belle Collaboration for the transverse polarization of $\Lambda$'s measured in $e^+ e^-$ annihilation processes are used to extract the polarizing fragmentation function (FF) within a TMD approach. We consider both…

High Energy Physics - Phenomenology · Physics 2021-08-03 Umberto D'Alesio , Francesco Murgia , Marco Zaccheddu

Fragmentation Functions at Belle

Fragmentation functions (FFs) describe the formation of final state particles from a partonic initial state. Precise knowledge of these functions is a key ingredient in accessing quantities such as the nucleon spin structure in…

Nuclear Experiment · Physics 2019-08-13 Martin Leitgab

Update on transversity and Collins functions from SIDIS and e+ e- data

We present an update of a previous global analysis of the experimental data on azimuthal asymmetries in semi-inclusive deep inelastic scattering (SIDIS), from the HERMES and COMPASS Collaborations, and in e+ e- -> h1 h2 X processes, from…

High Energy Physics - Phenomenology · Physics 2011-03-22 M. Anselmino , M. Boglione , U. D'Alesio , A. Kotzinian , F. Murgia , A. Prokudin , S. Melis

Measurement of the Differential Branching Fraction and Forward-Backword Asymmetry for B->K(*)l+l-

We study B->K(*)l+l- decays (l=e,mu) based on a data sample of 657 million BB pairs collected with the Belle detector at the KEKB e+e- collider. We report the differential branching fraction, isospin asymmetry, K* polarization, and the…

High Energy Physics - Experiment · Physics 2009-10-29 J. -T. Wei , P. Chang

Measurement of $e^+e^-\to D_s^{(*)+} D_s^{(*)-}$ cross sections near threshold using initial-state radiation

We report a measurement of exclusive $e^+e^-\to D_s^{(*)+} D_s^{(*)-}$ cross sections as a function of center-of-mass energy near $D_s^{(*)+} D_s^{(*)-}$ threshold with initial-state radiation. The analysis is based on a data sample…

High Energy Physics - Experiment · Physics 2011-02-25 G. Pakhlova et al.

Fragmentation of Transversely Polarized Quarks Probed in Transverse Momentum Distributions

It is shown that the azimuthal dependence of the distribution of hadrons in a quark jet is a probe of the transverse spin of the quark initiating the jet. This results in a new spin-dependent fragmentation function that acts at the twist-2…

High Energy Physics - Phenomenology · Physics 2009-10-22 John Collins

Observation of $B^{0} \rightarrow p\bar{\Lambda} D^{(*)-}$

We report the first observation of the decays $B^0 \rightarrow p\bar{\Lambda} D^{(*)-}$. The data sample of $711$ fb$^{-1}$ used in this analysis corresponds to $772$ million $B\bar{B}$ pairs, collected at the $\Upsilon(4S)$ resonance by…

High Energy Physics - Experiment · Physics 2015-12-02 Y. -Y. Chang , M. -Z. Wang , A. Abdesselam , I. Adachi , K. Adamczyk , H. Aihara , S. Al Said , D. M. Asner , H. Atmacan , T. Aushev , V. Babu , I. Badhrees , A. M. Bakich , E. Barberio , B. Bhuyan , J. Biswal , A. Bobrov , A. Bozek , M. Bračko , T. E. Browder , D. Červenkov , V. Chekelian , A. Chen , B. G. Cheon , K. Chilikin , R. Chistov , V. Chobanova , S. -K. Choi , Y. Choi , D. Cinabro , J. Dalseno , M. Danilov , J. Dingfelder , Z. Doležal , Z. Drásal , D. Dutta , S. Eidelman , H. Farhat , J. E. Fast , T. Ferber , B. G. Fulsom , V. Gaur , N. Gabyshev , S. Ganguly , A. Garmash , R. Gillard , R. Glattauer , Y. M. Goh , P. Goldenzweig , D. Greenwald , O. Grzymkowska , J. Haba , K. Hayasaka , H. Hayashii , X. H. He , W. -S. Hou , C. -L. Hsu , T. Iijima , K. Inami , A. Ishikawa , R. Itoh , Y. Iwasaki , W. W. Jacobs , I. Jaegle , D. Joffe , K. K. Joo , T. Kawasaki , D. Y. Kim , H. J. Kim , J. B. Kim , J. H. Kim , K. T. Kim , M. J. Kim , S. H. Kim , Y. J. Kim , K. Kinoshita , S. Korpar , P. Križan , P. Krokovny , T. Kuhr , T. Kumita , A. Kuzmin , Y. -J. Kwon , Y. -T. Lai , I. S. Lee , L. Li , Y. Li , J. Libby , D. Liventsev , P. Luki , M. Masuda , K. Miyabayashi , H. Miyake , H. Miyata , R. Mizuk , G. B. Mohanty , S. Mohanty , A. Moll , H. K. Moon , T. Mori , E. Nakano , M. Nakao , T. Nanut , M. Nayak , S. Nishida , S. Ogawa , H. Ozaki , P. Pakhlov , G. Pakhlova , B. Pal , C. W. Park , T . K. Pedlar , R. Pestotnik , M. Petrič , L. E. Piilonen , J. Rauch , E. Ribežl , M. Ritter , A. Rostomyan , S. Ryu , H. Sahoo , Y. Sakai , S. Sandilya , L. Santelj , T. Sanuki , V. Savinov , O. Schneider , G. Schnell , C. Schwanda , Y. Seino , K. Senyo , I. S. Seong , M. E. Sevior , V. Shebalin , C. P. Shen , T. -A. Shibata , J. -G. Shiu , F. Simon , Y. -S. Sohn , M. Starič , J. Stypula , M. Sumihama , K. Sumisawa , T. Sumiyoshi , U. Tamponi , K. Tanida , Y. Teramoto , T. Uglov , Y. Unno , S. Uno , Y. Usov , C. Van Hulse , P. Vanhoefer , G. Varner , V. Vorobyev , A. Vossen , M. N. Wagner , C. H. Wang , P. Wang , M. Watanabe , Y. Watanabe , K. M. Williams , E. Won , J. Yamaoka , S. Yashchenko , J. Yelton , Y. Yusa , Z. P. Zhang , V. Zhulanov , A. Zupanc

Observation of B0->pi0pi0

We report the first observation of the decay B0->pi0pi0, using a 253/fb data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB e+e- collider. The measured branching fraction is BF(B0->pi0pi0) = {2.32…

High Energy Physics - Experiment · Physics 2019-08-14 Y. Chao

First measurement of interference fragmentation on a transversely polarized hydrogen target

The HERMES experiment has measured for the first time single target-spin asymmetries in semi-inclusive two-pion production using a transversely polarized hydrogen target. These asymmetries are related to the product of two unknowns, the…

High Energy Physics - Experiment · Physics 2019-08-14 P. B. van der Nat

Improved measurements of branching fractions for B -> K pi and B -> pi pi decays

We report improved measurements of branching fractions for B -> K pi and B -> pi pi decays based on a data sample of 449 million B Bbar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB e^+e^- collider. We…

High Energy Physics - Experiment · Physics 2019-08-14 S. -W. Lin , P. Chang

We summarize the latest achievements about the extraction of the transversity parton distribution and proton tensor charge based on an analysis of pion-pair production in deep-inelastic scattering off transversely polarized targets.…

High Energy Physics - Phenomenology · Physics 2015-06-17 Marco Radici , Alessandro Bacchetta , A. Courtoy

Chiral imbalance in hadron matter : its manifestation in photon polarization asymmetries

The possibility of the formation of a local parity breaking (LPB) in a quark-hadron medium is examined as a result of chiral symmetry violation, i.e, the appearance of difference between the average densities of right- and left-handed…

High Energy Physics - Phenomenology · Physics 2019-10-23 A. A. Andrianov , V. A. Andrianov , D. Espriu , A. V. Iakubovich , A. E. Putilova

Measurement of azimuthal asymmetries in inclusive charged dipion production in $e^+e^-$ annihilations at $\sqrt{s}$ = 3.65 GeV

We present a measurement of the azimuthal asymmetries of two charged pions in the inclusive process $e^+e^-\rightarrow \pi\pi X$ based on a data set of 62 $\rm{pb}^{-1}$ at the center-of-mass energy $\sqrt{s}=3.65$ GeV collected with the…

High Energy Physics - Experiment · Physics 2016-01-29 BESIII Collaboration , M. Ablikim , M. N. Achasov , X. C. Ai , O. Albayrak , M. Albrecht , D. J. Ambrose , A. Amoroso , F. F. An , Q. An , J. Z. Bai , R. Baldini Ferroli , Y. Ban , D. W. Bennett , J. V. Bennett , M. Bertani , D. Bettoni , J. M. Bian , F. Bianchi , E. Boger , I. Boyko , R. A. Briere , H. Cai , X. Cai , O. Cakir , A. Calcaterra , G. F. Cao , S. A. Cetin , J. F. Chang , G. Chelkov , G. Chen , H. S. Chen , H. Y. Chen , J. C. Chen , M. L. Chen , S. J. Chen , X. Chen , X. R. Chen , Y. B. Chen , H. P. Cheng , X. K. Chu , G. Cibinetto , H. L. Dai , J. P. Dai , A. Dbeyssi , D. Dedovich , Z. Y. Deng , A. Denig , I. Denysenko , M. Destefanis , F. De Mori , Y. Ding , C. Dong , J. Dong , L. Y. Dong , M. Y. Dong , S. X. Du , P. F. Duan , E. E. Eren , J. Z. Fan , J. Fang , S. S. Fang , X. Fang , Y. Fang , L. Fava , F. Feldbauer , G. Felici , C. Q. Feng , E. Fioravanti , M. Fritsch , C. D. Fu , Q. Gao , X. Y. Gao , Y. Gao , Z. Gao , I. Garzia , K. Goetzen , W. X. Gong , W. Gradl , M. Greco , M. H. Gu , Y. T. Gu , Y. H. Guan , A. Q. Guo , L. B. Guo , Y. Guo , Y. P. Guo , Z. Haddadi , A. Hafner , S. Han , X. Q. Hao , F. A. Harris , K. L. He , X. Q. He , T. Held , Y. K. Heng , Z. L. Hou , C. Hu , H. M. Hu , J. F. Hu , T. Hu , Y. Hu , G. M. Huang , G. S. Huang , J. S. Huang , X. T. Huang , Y. Huang , T. Hussain , Q. Ji , Q. P. Ji , X. B. Ji , X. L. Ji , L. W. Jiang , X. S. Jiang , X. Y. Jiang , J. B. Jiao , Z. Jiao , D. P. Jin , S. Jin , T. Johansson , A. Julin , N. Kalantar-Nayestanaki , X. L. Kang , X. S. Kang , M. Kavatsyuk , B. C. Ke , P. Kiese , R. Kliemt , B. Kloss , O. B. Kolcu , B. Kopf , M. Kornicer , W. Kühn , A. Kupsc , J. S. Lange , M. Lara , P. Larin , C. Leng , C. Li , Cheng Li , D. M. Li , F. Li , F. Y. Li , G. Li , H. B. Li , J. C. Li , Jin Li , K. Li , K. Li , Lei Li , P. R. Li , T. Li , W. D. Li , W. G. Li , X. L. Li , X. M. Li , X. N. Li , X. Q. Li , Z. B. Li , H. Liang , Y. F. Liang , Y. T. Liang , G. R. Liao , D. X. Lin , B. J. Liu , C. X. Liu , F. H. Liu , Fang Liu , Feng Liu , H. B. Liu , H. H. Liu , H. H. Liu , H. M. Liu , J. Liu , J. B. Liu , J. P. Liu , J. Y. Liu , K. Liu , K. Y. Liu , L. D. Liu , P. L. Liu , Q. Liu , S. B. Liu , X. Liu , Y. B. Liu , Z. A. Liu , Zhiqing Liu , H. Loehner , X. C. Lou , H. J. Lu , J. G. Lu , Y. Lu , Y. P. Lu , C. L. Luo , M. X. Luo , T. Luo , X. L. Luo , X. R. Lyu , F. C. Ma , H. L. Ma , L. L. Ma , Q. M. Ma , T. Ma , X. N. Ma , X. Y. Ma , F. E. Maas , M. Maggiora , Y. J. Mao , Z. P. Mao , S. Marcello , J. G. Messchendorp , J. Min , R. E. Mitchell , X. H. Mo , Y. J. Mo , C. Morales Morales , K. Moriya , N. Yu. Muchnoi , H. Muramatsu , Y. Nefedov , F. Nerling , I. B. Nikolaev , Z. Ning , S. Nisar , S. L. Niu , X. Y. Niu , S. L. Olsen , Q. Ouyang , S. Pacetti , P. Patteri , M. Pelizaeus , H. P. Peng , K. Peters , J. Pettersson , J. L. Ping , R. G. Ping , R. Poling , V. Prasad , M. Qi , S. Qian , C. F. Qiao , L. Q. Qin , N. Qin , X. S. Qin , Z. H. Qin , J. F. Qiu , K. H. Rashid , C. F. Redmer , M. Ripka , G. Rong , Ch. Rosner , X. D. Ruan , V. Santoro , A. Sarantsev , M. Savri'e , K. Schoenning , S. Schumann , W. Shan , M. Shao , C. P. Shen , P. X. Shen , X. Y. Shen , H. Y. Sheng , W. M. Song , X. Y. Song , S. Sosio , S. Spataro , G. X. Sun , J. F. Sun , S. S. Sun , Y. J. Sun , Y. Z. Sun , Z. J. Sun , Z. T. Sun , C. J. Tang , X. Tang , I. Tapan , E. H. Thorndike , M. Tiemens , M. Ullrich , I. Uman , G. S. Varner , B. Wang , D. Wang , D. Y. Wang , K. Wang , L. L. Wang , L. S. Wang , M. Wang , P. Wang , P. L. Wang , S. G. Wang , W. Wang , X. F. Wang , Y. D. Wang , Y. F. Wang , Y. Q. Wang , Z. Wang , Z. G. Wang , Z. H. Wang , Z. Y. Wang , T. Weber , D. H. Wei , J. B. Wei , P. Weidenkaff , S. P. Wen , U. Wiedner , M. Wolke , L. H. Wu , Z. Wu , L. G. Xia , Y. Xia , D. Xiao , H. Xiao , Z. J. Xiao , Y. G. Xie , Q. L. Xiu , G. F. Xu , L. Xu , Q. J. Xu , X. P. Xu , L. Yan , W. B. Yan , W. C. Yan , Y. H. Yan , H. J. Yang , H. X. Yang , L. Yang , Y. Yang , Y. X. Yang , M. Ye , M. H. Ye , J. H. Yin , B. X. Yu , C. X. Yu , J. S. Yu , C. Z. Yuan , W. L. Yuan , Y. Yuan , A. Yuncu , A. A. Zafar , A. Zallo , Y. Zeng , B. X. Zhang , B. Y. Zhang , C. Zhang , C. C. Zhang , D. H. Zhang , H. H. Zhang , H. Y. Zhang , J. J. Zhang , J. L. Zhang , J. Q. Zhang , J. W. Zhang , J. Y. Zhang , J. Z. Zhang , K. Zhang , L. Zhang , X. Y. Zhang , Y. Zhang , Y. N. Zhang , Y. H. Zhang , Y. T. Zhang , Yu Zhang , Z. H. Zhang , Z. P. Zhang , Z. Y. Zhang , G. Zhao , J. W. Zhao , J. Y. Zhao , J. Z. Zhao , Lei Zhao , Ling Zhao , M. G. Zhao , Q. Zhao , Q. W. Zhao , S. J. Zhao , T. C. Zhao , Y. B. Zhao , Z. G. Zhao , A. Zhemchugov , B. Zheng , J. P. Zheng , W. J. Zheng , Y. H. Zheng , B. Zhong , L. Zhou , X. Zhou , X. K. Zhou , X. R. Zhou , X. Y. Zhou , K. Zhu , K. J. Zhu , S. Zhu , S. H. Zhu , X. L. Zhu , Y. C. Zhu , Y. S. Zhu , Z. A. Zhu , J. Zhuang , L. Zotti , B. S. Zou , J. H. Zou

Measuremements of the top-quark mass and polarization at the Tevatron

We present the most recent and sensitive measurements of the top quark mass, performed by the Tevatron experiments, D0 and CDF, using ppbar collision data at sqrt(s) = 1.96 TeV. We also present the first measurement of the top quark…

High Energy Physics - Experiment · Physics 2015-10-16 Boris Tuchming

Measurement of the inclusive $B\to X_{s+d} \gamma$ branching fraction, photon energy spectrum and HQE parameters

We report a measurement of the inclusive $B\to X_{s+d} \gamma$ and $B\to X_{s} \gamma$ branching fractions using a data set of $(772 \pm 11)\times 10^6$ $B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle detector at…

High Energy Physics - Experiment · Physics 2016-08-09 Belle Collaboration