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12 papers found.
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\(B^*_{s,d} \rightarrow \mu ^+ \mu ^-\) and its impact on \(B_{s,d} \rightarrow \mu ^+ \mu ^-\)

This study investigates \(B^*_{s,d}\rightarrow \mu ^+\mu ^-\) in the dimuon distributions and the hadronic contribution \(B_{s,d}\rightarrow B^*_{s,d}\gamma \rightarrow \mu ^+\mu ^-\). The \(\mu ^+\mu ^-\) decay widths of the vector mesons \(B^*_{s,d}\) are approximately a factor of 700 larger than the corresponding scalar mesons \(B_{s,d}\). The ratio of the branching fractions ...

Five New Alkaloids from Cephalotaxus lanceolata and C. fortunei var. alpina

Five new alkaloids (1–5) were isolated from the leaves and twigs of Cephalotaxus lanceolata and C. fortunei var. alpina along with 24 known alkaloids. The new structures were elucidated based on spectroscopic data including 1D and 2D NMR, FTIR, UV and MS. These new alkaloids showed no cytotoxicity to HeLa, SGC-7901 gastric cancer, and A-549 lung cancer cell lines.

Yields and polarizations of prompt J/ψ and ψ(2S) production in hadronic collisions

We give predictions of J/ψ and ψ(2S) yields and polarizations in prompt production at hadron colliders based on non-relativistic QCD factorization formula. We calculate short-distance coefficients of all important color-octet intermediate channels as well as color-singlet channels up to \( \mathcal{O}\left({\alpha}_S^4\right) \) , i.e. next-to-leading order in α S . For prompt J/ψ ...

The cosmic ray test of MRPCs for the BESIII ETOF upgrade

In order to improve the particle identification capability of endcap time-of-flight (ETOF) at Beijing Spectrometer III, it is proposed to upgrade current ETOF detector with multi-gap resistive plate chamber (MRPC) technology aiming at extending ETOF overall time resolution to be 80–100 ps for \(\pi \)’s. The new ETOF system including MRPC detectors, front end electronics, CLOCK ...

α s v 2 corrections to η c and χ cJ production recoiled with a photon at e + e − colliders

We consider the production of η c and χ cJ states recoiled with a photon up-to \( \mathcal{O}\left({\alpha}_s{v}^2\right) \) at BESIII and B-factories within the frame of NRQCD factorization. With the corrections, we revisit the numerical calculations to the cross sections for η c (nS) and χ cJ (mP ) states. We argue that the search for XY Z states with even charge conjugation such ...

Expression and function of NET-1 in human skin squamous cell carcinoma

To evaluate the clinicopathological significance of NET-1 in human skin squamous cell carcinoma (SSCC). The expression of NET-1 and Ki67 protein was detected using immunostaining from 60 SSCC cases, 50 SIN samples and ten normal skin tissues. The vectors expressing NET-1, siRNA NET-1 and shRNA NET-1 were constructed, as well as negative controls (target-off). In transfected A431 ...

Generation of THz transients by photoexcited single-crystal GaAs meso-structures

We report a sub-picosecond photoresponse and THz transient generation of GaAs single-crystal mesoscopic platelets excited by femtosecond optical pulses. Our structures were fabricated by a top-down technique, by patterning an epitaxial, 500-nm-thick GaAs film grown on top of an AlAs sacrificial layer and then transferring the resulting etched away 10 × 20-μm2 platelets onto an MgO ...

Search for C = + charmonium and XYZ states in e + e − → γ + H at BESIII

Within the framework of nonrelativistic quantum chromodynamics, we study the production of C = + charmonium states H in e + e − → γ + H at BESIII with H = ηc(nS) (n = 1, 2, 3, and 4), χ cJ (nP) (n = 1, 2, and 3), and 1 D 2(nD) (n = 1 and 2). The radiative and relativistic corrections are calculated to next-to-leading order for S and P wave states. We then argue that the search for ...

Clinical analysis and prognostic significance of lymphoma-associated hemophagocytosis in peripheral T cell lymphoma

Wanzhuo Xie Keyue Hu Fan Xu De Zhou Jingsong He Jimin Shi Yi Luo Jingjing Zhu Jie Zhang Maofang Lin Xiujin Ye He Huang Zhen Cai 0 ) Department of Hematology, Bone Marrow Transplant Center, The First

Aggregation-prone c9FTD/ALS poly(GA) RAN-translated proteins cause neurotoxicity by inducing ER stress

The occurrence of repeat-associated non-ATG (RAN) translation, an atypical form of translation of expanded repeats that results in the synthesis of homopolymeric expansion proteins, is becoming more widely appreciated among microsatellite expansion disorders. Such disorders include amyotrophic lateral sclerosis and frontotemporal dementia caused by a hexanucleotide repeat expansion ...

Antisense transcripts of the expanded C9ORF72 hexanucleotide repeat form nuclear RNA foci and undergo repeat-associated non-ATG translation in c9FTD/ALS

Frontotemporal dementia (FTD) and amyotrophic lateral sclerosis (ALS) are devastating neurodegenerative disorders with clinical, genetic, and neuropathological overlap. A hexanucleotide (GGGGCC) repeat expansion in a non-coding region of C9ORF72 is the major genetic cause of both diseases. The mechanisms by which this repeat expansion causes “c9FTD/ALS” are not definitively known, ...

Three new nortriterpenoids from Schisandra wilsoniana and their anti-HIV-1 activities

Three new highly oxygenated nortriterpenoids, wilsonianadilactones D–F (1–3), were isolated from the leaves and stems of Schisandra wilsoniana. Their structures were established by means of spectroscopic analysis. Compounds 1–3 showed weak anti-HIV-1 activity with the therapeutic index (TI) values (CC50/EC50) greater than 8.16, 14.7, and 17.5, respectively.