449 results on '"Shinya Matsuzaki"'
Search Results
402. A case of acute Sheehan's syndrome and literature review: a rare but life-threatening complication of postpartum hemorrhage.
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Shinya Matsuzaki, Masayuki Endo, Yutaka Ueda, Kazuya Mimura, Aiko Kakigano, Tomomi Egawa-Takata, Keiichi Kumasawa, Kiyoshi Yoshino, Tadashi Kimura, Matsuzaki, Shinya, Endo, Masayuki, Ueda, Yutaka, Mimura, Kazuya, Kakigano, Aiko, Egawa-Takata, Tomomi, Kumasawa, Keiichi, Yoshino, Kiyoshi, and Kimura, Tadashi
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SHEEHAN'S syndrome , *UTERINE artery , *HEMORRHAGE , *PUERPERAL disorders , *PITUITARY necrosis , *ADRENAL insufficiency , *SURGERY , *BLOOD protein disorders , *HYPOGLYCEMIA , *HYPOTHYROIDISM , *ACUTE diseases , *HYPOPITUITARISM , *DIAGNOSIS - Abstract
Background: Sheehan's syndrome occurs because of severe postpartum hemorrhage causing ischemic pituitary necrosis. Sheehan's syndrome is a well-known condition that is generally diagnosed several years postpartum. However, acute Sheehan's syndrome is rare, and clinicians have little exposure to it. It can be life-threatening. There have been no reviews of acute Sheehan's syndrome and no reports of successful pregnancies after acute Sheehan's syndrome. We present such a case, and to understand this rare condition, we have reviewed and discussed the literature pertaining to it. An electronic search for acute Sheehan's syndrome in the literature from January 1990 and May 2014 was performed.Case Presentation: A 27-year-old woman had massive postpartum hemorrhage (approximately 5000 mL) at her first delivery due to atonic bleeding. She was transfused and treated with uterine embolization, which successfully stopped the bleeding. The postpartum period was uncomplicated through day 7 following the hemorrhage. However, on day 8, the patient had sudden onset of seizures and subsequently became comatose. Laboratory results revealed hypothyroidism, hypoglycemia, hypoprolactinemia, and adrenal insufficiency. Thus, the patient was diagnosed with acute Sheehan's syndrome. Following treatment with thyroxine and hydrocortisone, her condition improved, and she was discharged on day 24. Her next pregnancy was established 2 years after her first delivery. She required induction of ovulation for the next conception. The pregnancy, delivery, and postpartum period were uneventful. An electronic search of the literature yielded 21 cases of acute Sheehan's syndrome. Presenting signs varied, including adrenal insufficiency (12 cases), diabetes insipidus (4 cases), hypothyroidism (2 cases), and panhypopituitarism (3 cases), with a median time of presentation after delivery for each of those conditions being 7.9, 4, 18, and 9 days, respectively. Serial changes in magnetic resonance imaging were reported in some cases of acute Sheehan's syndrome.Conclusion: Clinicians should be aware of the risk of acute Sheehan's syndrome after a massive postpartum hemorrhage in order to diagnose it accurately and treat it promptly. [ABSTRACT FROM AUTHOR]- Published
- 2017
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403. 'Smartscopy' as an alternative device for cervical cancer screening: a pilot study.
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Yusuke Tanaka, Yutaka Ueda, Akiko Okazawa, Mamoru Kakuda, Shinya Matsuzaki, Eiji Kobayashi, Kiyoshi Yoshino, and Tadashi Kimura
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- 2017
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404. Placenta percreta with a vaginal fistula after successful management by uterine transverse fundal incision and subsequent cesarean hysterectomy
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Eiichi Morii, Kazuya Mimura, Tomomi Egawa-Takata, Takeshi Kanagawa, Tadashi Kimura, Satoko Matsuzaki, Yutaka Ueda, and Shinya Matsuzaki
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medicine.medical_specialty ,Pregnancy ,Vaginal fistula ,Obstetrics ,business.industry ,Placenta accreta ,Placenta Percreta ,Obstetrics and Gynecology ,Case Report ,medicine.disease ,Maternal-Fetal Medicine ,Surgery ,Placenta previa ,medicine.anatomical_structure ,Obstetrics and gynaecology ,Cesarean hysterectomy ,Placenta ,embryonic structures ,medicine ,business ,Uterine transverse fundal incision ,reproductive and urinary physiology - Abstract
Placenta previa presents a highest risk to pregnancy, and placenta accreta is the most serious. Placenta accreta requires cesarean delivery and often results in massive obstetric hemorrhage and higher maternal morbidity. Challenges associated with cesarean delivery techniques may contribute to increased maternal blood loss and morbidity rates. Several recent obstetric studies reported the usefulness of transverse uterine fundal incision for managing placenta accreta. We present a case of placenta percreta that was treated by a transverse fundal incision. We successfully avoided cutting through the placenta and helped decrease maternal blood loss. After delivery, the patient underwent a cesarean hysterectomy. Postoperative day 48, she experienced watery discharge and was diagnosed with vaginal fistula. We present our case and review the literature.
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- 2014
405. Cesarean delivery after successful external cephalic version of breech presentation at term
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Koichiro Shimoya, Shinya Matsuzaki, and Yuji Murata
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medicine.medical_specialty ,medicine.medical_treatment ,Japan ,Pregnancy ,Breech presentation ,medicine ,Humans ,In patient ,Cesarean delivery ,Breech Presentation ,Version, Fetal ,Retrospective Studies ,Cesarean Section ,Obstetrics ,business.industry ,Cephalic presentation ,Pregnancy Outcome ,Obstetrics and Gynecology ,General Medicine ,Japanese population ,Delivery, Obstetric ,University hospital ,Dystocia ,Surgery ,Case-Control Studies ,External cephalic version ,Population study ,Female ,business ,Maternal Age - Abstract
The rate of cesarean delivery was higher in patients with a fetus in cephalic presentation after a successful external cephalic version (ECV) [1,2]. However, other studies do not support those results [3,4]. This controversy is most likely the result of the heterogeneity of the study population. The aim of the present study was to evaluate whether patients who had undergone successful ECV at term were at a higher risk of cesarean section in Japanese population. The present study was performed on patients who were delivered in Osaka University Hospital between 1995 and 2004. Inclusion criteria for ECV
- Published
- 2006
406. Long-term survival in small-cell carcinoma of the endometrium with liver and brain metastases.
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Masaaki Sawada, Shinya Matsuzaki, Kiyoshi Yoshino, Yutaka Ueda, Susumu Yoshida, Tadashi Kimura, and Kazuhide Ogita
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- 2016
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407. Potential targets for ovarian clear cell carcinoma: a review of updates and future perspectives.
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Shinya Matsuzaki, Kiyoshi Yoshino, Yutaka Ueda, Satoko Matsuzaki, Mamoru Kakuda, Akiko Okazawa, Tomomi Egawa-Takata, Eiji Kobayashi, and Tadashi Kimura
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OVARIAN cancer treatment , *RENAL cell carcinoma , *CANCER treatment , *DRUG efficacy , *ANNEXINS - Abstract
Advances in surgical and medical treatments for ovarian cancer have improved prognoses. Platinum drugs in particular are pivotal for the medical treatment of ovarian cancer. However, previous studies have revealed that some histological subtypes, such as clear cell carcinoma, are resistant to medical treatment, including that with platinum drugs. Consequently, the clinical prognosis of advanced clear cell carcinoma is remarkably inferior, primarily because of its chemoresistant behavior. The prevalence of clear cell carcinoma is approximately 5 % in the West, but in Japan, its prevalence is particularly high, at approximately 25 %. Current medical treatments for advanced clear cell carcinoma are difficult to administer, and they have poor efficacy, warranting the development of novel target-based therapies. In this review, we describe medical treatments for clear cell carcinoma and discuss future prospects for therapy. In particular, we focus on the mechanism of platinum resistance in clear cell carcinoma, including the role of annexin A4, one of the most investigated factors of platinum resistance, as well as the mutant genes and overexpressed proteins such as VEGF, PI3K/AKT/mTOR signaling pathway, ARID1A, hepatocyte nuclear factor-1β, ZNF217. We also review targeted molecular therapeutics for epithelial ovarian cancer and discuss their role in clear cell carcinoma treatment. We review the drugs targeting angiogenesis (bevacizumab, sorafenib, and pazopanib), growth factors (gefitinib, erlotinib, lapatinib, trastuzumab, and AMG479), and signaling pathways (temsirolimus, dasatinib, and imatinib), and other drugs (oregovomab, volociximab, and iniparib). This current review summarizes and discusses the clinical significance of these factors in ovarian clear cell carcinoma as well as their potential mechanisms of action. It may provide new integrative understanding for future studies on their exact role in ovarian clear cell carcinoma. [ABSTRACT FROM AUTHOR]
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- 2015
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408. Abstract 4057: Functional domain of Annexin A4: which domain is indispensable for chemoresistance to platinum drugs
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Masami Fujita, Takayuki Enomoto, Takuhei Yokoyama, Tetsuji Naka, Akiko Morimoto, Kousuke Hiramatsu, Tadashi Kimura, Satoshi Serada, Shinya Matsuzaki, Kiyoshi Yoshino, and Yutaka Ueda
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Cisplatin ,Cancer Research ,Cancer ,Transfection ,Biology ,medicine.disease ,Bioinformatics ,Carboplatin ,chemistry.chemical_compound ,Oncology ,chemistry ,Annexin ,Cell culture ,Cancer research ,medicine ,MTT assay ,Ovarian cancer ,medicine.drug - Abstract
Background: Platinum drugs are often used for the postoperative adjuvant therapy or treatment in advanced and recurrent ovarian cancer. We have previously reported that ovarian clear cell carcinoma (CCC) has increased expression of Annexin A4 (Anx A4) in comparison with other subtype of ovarian cancer. Enhanced expression of Anx A4 has been shown to induce chemoresistance via extracellular efflux of carboplatin. Purpose: To identify the domain of Anx A4 relevant to chemoresistance. Materials and methods: Anx A4 possesses the NH2-terminal domain and four annexin repeat domains with one Ca2+-binding site in each domain. Deleting annexin repeat domains one by one from C-terminal site, we generated four deletion mutants of Anx A4 named R1, 2, 3, and 4 (arabic figure shows the number of annexin repeat domains). Stable cell lines overexpressing each deletion mutants were established in NUGC3 cells. Chemosensitivity to platinum drugs was evaluated using the MTT assay. Results. Compared with mock transfected cells, all the four deletion mutants induced chemoresistance to both cisplatin and carboplatin. Conclusions. The deletion derivative covering only one annexin repeat domain can induce chemoresistance to platinum drugs. Further study is underway to determine the specific site for chemoresistance of Anx A4. Citation Format: Akiko Morimoto, Takayuki Enomoto, Shinya Matsuzaki, Kousuke Hiramatsu, Yutaka Ueda, Kiyoshi Yoshino, Masami Fujita, Takuhei Yokoyama, Satoshi Serada, Tetsuji Naka, Tadashi Kimura. Functional domain of Annexin A4: which domain is indispensable for chemoresistance to platinum drugs. [abstract]. In: Proceedings of the 104th Annual Meeting of the American Association for Cancer Research; 2013 Apr 6-10; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2013;73(8 Suppl):Abstract nr 4057. doi:10.1158/1538-7445.AM2013-4057
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- 2013
409. Abstract 4059: Annexin A4-conferred platinum resistance is mediated by the copper transporter ATP7A
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Tadashi Kimura, Yutaka Ueda, Kiyoshi Yoshino, Tetsuji Naka, Takuhei Yokoyama, Masami Fujita, Takayuki Enomoto, Akiko Morimoto, Satoshi Serada, Eiji Kobayashi, Shinya Matsuzaki, and Toshihiro Kimura
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Cisplatin ,Cancer Research ,Small interfering RNA ,ATP7A ,Biology ,Carboplatin ,In vitro ,chemistry.chemical_compound ,Oncology ,chemistry ,In vivo ,Annexin ,Immunology ,medicine ,Cancer research ,Efflux ,medicine.drug - Abstract
Because platinum drugs are often used for the chemotherapy of human cancers, when platinum resistance occurs it is a major issue. We recently reported that enhanced expression of Annexin A4 (Anx A4) increases chemoresistance to Carboplatin via increased extracellular efflux of the drug. However, the precise mechanisms of that chemoresistance, and the relationship of Anx A4 to platinum resistance in vivo, remain unclear. In this report we investigate in vitro the mechanism of platinum resistance induced by Anx A4 in endometrial carcinoma cells (HEC1 cells) which normally have a low level of expression of Anx A4. Forced expression of Anx A4 in HEC1 cells resulted in chemoresistance to platinum drugs. In addition, we compared HEC1 control cells with Anx A4-overexpressing HEC1 cells when both were xenografted to mice, Anx A4-overexpressing xenografted mice presented with significantly greater chemoresistance to Cisplatin in vivo. By immunofluorescence analysis we found that exposure to platinum drugs induced relocation of Anx A4 from the cytoplasm to the cellular membrane, where it became co-localized with ATP7A, a copper transporter also well known to be a platinum effluxer. When the expression of ATP7A was suppressed by small interfering RNA in HEC1 control cells, they showed no change of chemosensitivity to platinum drugs. However, suppressed ATP7A in Anx A4 overexpressing platinum-resistant cells, they showed improved chemosensitivity to platinum drugs, to a level comparable of that of control cells. Our results indicate that enhanced expression of Anx A4 confers platinum resistance by promoting efflux of platinum drugs via ATP7A. Citation Format: Shinya Matsuzaki, Akiko Morimoto, Satoshi Serada, Takuhei Yokoyama, Toshihiro Kimura, Eiji Kobayashi, Yutaka Ueda, Kiyoshi Yoshino, Masami Fujita, Takayuki Enomoto, Tetsuji Naka, Tadashi Kimura. Annexin A4-conferred platinum resistance is mediated by the copper transporter ATP7A. [abstract]. In: Proceedings of the 104th Annual Meeting of the American Association for Cancer Research; 2013 Apr 6-10; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2013;73(8 Suppl):Abstract nr 4059. doi:10.1158/1538-7445.AM2013-4059
- Published
- 2013
410. One-Family Walking Techni-Pions.
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Junji Jia, Shinya Matsuzaki, and Koichi Yamawaki
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PIONS ,ELECTROWEAK interactions ,FERMIONS ,SUPERCONDUCTING Super Collider ,COLLIDERS (Nuclear physics) ,HIGGS bosons - Published
- 2014
411. 125 GeV Technidilaton at the LHC.
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Shinya Matsuzaki
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HIGGS bosons ,DECAY constants ,PARTICLES ,PHOTONS ,GLUONS - Published
- 2014
412. Abstract 4225: Annexin A4 induces chemoresistance for multiple drugs in ovarian clear cell carcinoma
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Shinya Matsuzaki, Kiyoshi Yoshino, Masami Fujita, Yutaka Ueda, Akiko Morimoto, Satoshi Serada, Takuhei Yokoyama, Takayuki Enomoto, Toshihiro Kimura, Tetsuji Naka, Minoru Fujimoto, and Tadashi Kimura
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Oncology ,Cisplatin ,Cancer Research ,medicine.medical_specialty ,Gene knockdown ,business.industry ,Cancer ,medicine.disease ,Carboplatin ,chemistry.chemical_compound ,chemistry ,Annexin ,Internal medicine ,Clear cell carcinoma ,medicine ,Adjuvant therapy ,Ovarian cancer ,business ,medicine.drug - Abstract
BACKGROUND: Platinum drugs play the key role for postoperative adjuvant therapy and treatment in progress and recurrent ovarian cancer. We have previously reported that ovarian clear cell carcinoma (CCC) has increased expression of Annexin A4 (Anx A4) in comparison with other subtypes of ovarian cancer. Enhanced expression of Anx A4 has been shown to induce chemoresistance via extracellular efflux of carboplatin. However, it remains unclear whether targeting Anx A4 is effective for improving the sensitization against chemotherapy, like platinum drugs. The aim of this study was to evaluate the role of Anx A4 in chemoresistance in ovarian CCC. MATERIAL AND METHODS: RMG-I cell lines were used to establish the stable knockdown of Anx A4. Plasmids encoding short hairpin RNAs (shRNAs) targeting Anx A4 were transfected. Chemoresistance was assessed by IC50 value in various drugs. RESULTS: Compared with control cells, knockdown of Anx A4 gene expression in RMG-I cells induced chemosentisitzation around 2-fold to cisplatin (IC50: 11.2 μM to 5.8 μM, P Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 103rd Annual Meeting of the American Association for Cancer Research; 2012 Mar 31-Apr 4; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2012;72(8 Suppl):Abstract nr 4225. doi:1538-7445.AM2012-4225
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- 2012
413. Abstract 5108: Quantitative proteomic analysis of cell-surface membrane proteins: Biomarker discovery in endometrial cancer
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Ayako Kim, Masami Fujita, Kiyoshi Yoshino, Yutaka Ueda, Toshihiro Kimura, Satoshi Serada, Takuhei Yokoyama, Shinya Matsuzaki, Tetsuji Naka, Minoru Fujimoto, Tadashi Kimura, and Takayuki Enomoto
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Cancer Research ,Endometrial cancer ,Cancer ,Cell migration ,Biology ,medicine.disease ,Bioinformatics ,Cell membrane ,medicine.anatomical_structure ,Oncology ,Membrane protein ,Antigen ,Biotinylation ,medicine ,Cancer research ,Biomarker discovery - Abstract
Background. Endometrial cancer is one of the most common malignancies of the female genital tract. The identification of proteins for prognostic assessment and therapeutic targets in this disease is of significant clinical importance. Quantitative proteomic analysis provides a powerful approach in screening for alterations in protein levels and post-translational modifications that are associated with tumors. To date, proteomic studies of cancer have focused particularly on sub-cellular compartments or post-translational modifications. An analysis of the differential expression of cell-surface membrane proteins would be of particular interest, since these proteins play key roles in cell function including cell migration and drug resistance. Purpose of study. To identify membrane proteins overexpressed in endometrial cancer which may represent novel biomarkers of disease and therapeutic targets. Procedures. We developed a biotinylation-based approach for cell membrane enrichment combined with iTRAQ (isobaric tags for relative and absolute quantitation) technology using nano-LC-MS/MS analysis, to identify cell surface proteins overexpressed in seven endometrial cancer cell lines compared with a control normal endometrial cell line. Results. 365 proteins were identified, of which, 65 proteins (18%) possessed a trans-membrane domain. We identified overexpression of 24 membrane proteins in endometrial cancer cell lines compared with a normal endometrial cell line. By this proteomic approach, we identified several tumor antigens which included antigens previously associated with endometrial cancer and antigens not previously reported in this disease. Tumorigenic proteins such as neural cell adhesion molecule L1 (NCAML1), previously reported to be overexpressed in endometrial cancer, were identified. Interestingly we also identified Claudin-4, a protein associated with poor prognosis in various cancers, but not previously reported in the pathogenesis of cancer. In addition, we also successfully identified novel antigens associated with endometrial cancer. Conclusions. We developed a high throughput cell-surface membrane proteomic analysis combining biotinylation of cell-surface membrane protein and iTRAQ technology. In addition to the identification of previously reported tumor antigens such as NCAML1 and Claudin-4, we also identified novel tumor antigens in endometrial cancer by this methodology. This iTRAQ based quantitative proteomic analysis represented a useful approach in screening for novel disease biomarkers and therapeutic targets. Further studies on the physiological role of novel tumor antigens overexpressed in endometrial cancer and their application as biomarkers/therapeutic targets are underway. Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 102nd Annual Meeting of the American Association for Cancer Research; 2011 Apr 2-6; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2011;71(8 Suppl):Abstract nr 5108. doi:10.1158/1538-7445.AM2011-5108
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- 2011
414. A Case Report and Literature Review of Midtrimester Termination of Pregnancy Complicated by Placenta Previa and Placenta Accreta.
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Satoko Matsuzaki, Mamoru Kakuda, Shinya Matsuzaki, Takeshi Kanagawa, Yutaka Ueda, Tadashi Kimura, and Yusuke Tanaka
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- 2015
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415. Techni-Dilaton Signatures at LHC.
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Shinya Matsuzaki and Koichi Yamawaki
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LARGE Hadron Collider ,HIGGS bosons ,FERMIONS ,PARTICLE physics ,HEAVY particles (Nuclear physics) ,STANDARD model (Nuclear physics) - Published
- 2013
416. Integrating Out Holographic QCD Back to Hidden Local Symmetry.
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Masayasu Harada, Shinya Matsuzaki, and Koichi Yamawaki
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QUANTUM chromodynamics ,SYMMETRIES (Quantum mechanics) ,HOLOGRAPHY ,GAUGE invariance ,CHIRAL perturbation theory ,NAMBU-Goldstone bosons ,MATHEMATICAL models - Published
- 2011
417. One-Loop Corrections to the S and T Parameters in a Three Site Higgsless Model.
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Shinya Matsuzaki, Chivukula, R. Sekhar, Simmons, Elizabeth H., and Masaharu Tanabashi
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STANDARD model (Nuclear physics) ,NAMBU-Goldstone bosons ,ELECTROWEAK interactions ,TRIPLET state (Quantum mechanics) ,FERMIONS - Published
- 2008
418. Dilaton Chiral Perturbation Theory: Determining the Mass and Decay Constant of the Technidilaton on the Lattice.
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Shinya Matsuzaki and Koichi Yamawaki
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DILATON , *CHIRALITY of nuclear particles , *HYPOTHETICAL particles , *LATTICE theory , *ABSTRACT algebra , *BOOLEAN algebra - Abstract
We propose a scale-invariant chiral perturbation theory of the pseudo-Nambu-Goldstone bosons of chiral symmetry (pion π) as well as the scale symmetry (dilaton ϕ) for large Nf QCD. The resultant dilaton mass Mϕ reads M2ϕ= m2ϕ +1/4(3 - γm)( 1 + γm)(2Nf F2π/ F2ϕ)m2x + (chiral log corrections), where mϕ, mx, γm, Fx, and Fϕ are the dilaton mass in the chiral limit, the pion mass, the mass anomalous dimension, and the decay constants of π and ϕ, respectively. The chiral extrapolation of the lattice data, when plotted as M2ϕ versus m2x, then simultaneously determines (mϕ, Fϕ) of the technidilaton in walking technicolor with γm = 1. The chiral logarithmic corrections are explicitly given. [ABSTRACT FROM AUTHOR]
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- 2014
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419. Interstitial Pregnancy Resulting in a Viable Infant Coexistent with Massive Perivillous Fibrin Deposition: A Case Report and Literature Review.
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Yusuke Tanaka, Kazuya Mimura, Takeshi Kanagawa, Masahiro Nakayama, Shinya Matsuzaki, Yukiko Kinugasa-Taniguchi, Masayuki Endo, and Tadashi Kimura
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- 2014
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420. Challenges in Diagnosis of Pseudo Vasa Previa.
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Etsuko Kajimoto, Shinya Matsuzaki, Satoko Matsuzaki, Yusuke Tanaka, Yukiko Kinugasa-Taniguchi, Kazuya Mimura, Takeshi Kanagawa, and Tadashi Kimura
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DIAGNOSIS of placenta diseases , *TREATMENT effectiveness , *DELIVERY (Obstetrics) , *DOPPLER ultrasonography - Abstract
Vasa previa is a rare but clinically important obstetrical complication that can be associated with a low-lying placenta or placenta previa. We aim to convey the challenges in diagnosing this condition by presenting 2 cases of pseudo vasa previa diagnosed antenatally as vasa previa using standard and color Doppler ultrasonography. Both patients were falsely diagnosed; only a low-lying placenta was revealed after delivery. These reports emphasize that accurate identification of vasa previa on cervical imaging is important for determining an appropriate treatment strategy. [ABSTRACT FROM AUTHOR]
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- 2014
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421. Vacuum alignment of the top-mode pseudo-Nambu-Goldstone boson Higgs model.
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Masafumi Kurachi, Shinya Matsuzaki, and Fukano, Hidenori S.
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VACUUM , *HIGGS bosons , *LARGE Hadron Collider , *ELECTROWEAK interactions , *NUCLEAR physics - Abstract
We study the vacuum alignment of the top-mode pseudo-Nambu-Goldstone boson Higgs (TMpNGBH) model, which has recently been proposed as a variant of the top-quark condensate model in light of the 126 GeV Higgs boson discovered at the LHC. It is shown that the vacuum of the model, determined from the one-loop effective potential with all the explicit breaking effects included, realizes the electroweak symmetry breaking with the appropriate breaking scale. Phenomenologies of two characteristic particles in the TMpNGBH model, namely the CP-odd partner of the Higgs (A0t) and the vectorlike partner of the top quark (t'), are also studied based on the newly identified vacuum. [ABSTRACT FROM AUTHOR]
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- 2015
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422. Walking technipions in a holographic model.
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Masafumi Kurachi, Shinya Matsuzaki, and Koichi Yamawaki
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PIONS , *HOLOGRAPHY , *ELECTROWEAK interactions , *QUANTUM chromodynamics , *HIGGS bosons , *STANDARD model (Nuclear physics) , *LARGE Hadron Collider , *FLAVOR in particle physics - Abstract
We calculate masses of the technipions in the walking technicolor model with the anomalous dimension γm = 1, based on a holographic model which has a naturally light technidilaton ɸ as a composite Higgs with mass mɸ≃125??GeV. The one-family model (with four weak doublets) is taken as a concrete example in such a framework, with the inputs being Fπ = ν/2 ≃ 123??GeV and mɸ ≃ 125??GeV as well as γm = 1. It is shown that technipion masses are enhanced by the large anomalous dimension to typically O(1)??TeV. We find a correlation between the technipion masses and S(TC), the S parameter arising only from the technicolor sector. The current LHC data on the technipion mass limit thus constrains S(TC) to be not as large as O(1), giving a direct constraint on the technicolor model building. This is a new constraint on the technicolor sector alone, quite independent of other sectors connected by the extended-technicolor-type interactions--in sharp contrast to the conventional S parameter constraint from the precision electroweak measurements. [ABSTRACT FROM AUTHOR]
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- 2014
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423. Discovering walking technirho mesons at the LHC.
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Masafumi Kurachi, Shinya Matsuzaki, and Koichi Yamawaki
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LARGE Hadron Collider , *MESONS , *STANDARD model (Nuclear physics) , *CHIRALITY of nuclear particles , *HIGGS bosons - Abstract
We formulate a scale-invariant hidden local symmetry (HLS) as a low-energy effective theory of walking technicolor (WTC) which includes the technidilaton, technipions, and technirho mesons as the low-lying spectra. As a benchmark for LHC phenomenology, we in particular focus on the one-family model of WTC having eight technifermion flavors, which can be--at energy scales relevant to the reach of the LHC--described by the scale-invariant HLS based on the manifold [SU(8)L x SU(8)R]global x SU(8)local/SU(8)V, where SU(8)local is the HLS and the global SU(8)L x SU(8)R symmetry is partially gauged by the SU(3) x SU(2)L x U(1)Y of the standard model. Based on the scale-invariant HLS, we evaluate the coupling properties of the technirho mesons and place limits on the masses from the current LHC data. Then, implications for future LHC phenomenology are discussed by focusing on the technirho mesons produced through the Drell-Yan process. We find that the color-octet technirho decaying to the technidilaton along with the gluon is of interest as the discovery channel at the LHC, which would provide a characteristic signature to probe the one-family WTC. [ABSTRACT FROM AUTHOR]
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- 2014
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424. Holographic Techni-Dilaton, or Conformal Higgs.
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Kazumoto Habaa, Shinya Matsuzaki, and Koichi Yamawaki
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HIGGS bosons ,HOLOGRAPHY ,MESONS ,GLUONS ,CONDENSATION - Published
- 2011
425. 2 TeV walking technirho at LHC?
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Koichi Yamawaki, Koji Terashi, Shinya Matsuzaki, Hidenori S. Fukano, and Masafumi Kurachi
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Physics ,Nuclear and High Energy Physics ,Gauge boson ,Particle physics ,Large Hadron Collider ,Meson ,Physics beyond the Standard Model ,Electroweak interaction ,High Energy Physics::Phenomenology ,FOS: Physical sciences ,Technicolor ,lcsh:QC1-999 ,High Energy Physics - Experiment ,High Energy Physics - Phenomenology ,High Energy Physics - Experiment (hep-ex) ,High Energy Physics - Phenomenology (hep-ph) ,Effective field theory ,Higgs boson ,High Energy Physics::Experiment ,lcsh:Physics - Abstract
The ATLAS collaboration has recently reported an excess of about 2.5 $\sigma$ global significance at around 2 TeV in the diboson channel with the boson-tagged fat dijets, which may imply a new resonance beyond the standard model. We provide a possible explanation of the excess as the isospin-triplet technivector mesons (technirhos, denoted as $\rho_\Pi^{\pm,3}$) of the walking technicolor in the case of the one-family model as a benchmark. As the effective theory for the walking technicolor at the scales relevant to the LHC experiment, we take a scale-invariant version of the hidden local symmetry model so constructed as to accommodate technipions, technivector mesons, and the technidilaton in such a way that the model respects spontaneously broken chiral and scale symmetries of the underlying walking technicolor. In particular, the technidilaton, a (pseudo) Nambu-Goldstone boson of the (approximate) scale symmetry predicted in the walking technicolor, has been shown to be successfully identified with the 125 GeV Higgs. Currently available LHC limits on those technihadrons are used to fix the couplings of technivector mesons to the standard-model fermions and weak gauge bosons. We find that the technirho's are mainly produced through the Drell-Yan process and predominantly decay to the dibosons, which accounts for the currently reported excess at around 2 TeV. The consistency with the electroweak precision test and other possible discovery channels of the 2 TeV technirhos are also addressed., Comment: 8 pages, 4 eps figures, latex; version to appear in PLB
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426. Is 125 GeV techni-dilaton found at LHC?
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Koichi Yamawaki and Shinya Matsuzaki
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Physics ,Coupling ,Nuclear and High Energy Physics ,Particle physics ,Large Hadron Collider ,High Energy Physics::Phenomenology ,FOS: Physical sciences ,Technicolor ,Scale invariance ,Symmetry (physics) ,High Energy Physics - Experiment ,High Energy Physics - Experiment (hep-ex) ,High Energy Physics - Phenomenology ,High Energy Physics - Phenomenology (hep-ph) ,Dilaton ,Event (particle physics) ,Boson - Abstract
A new particle at around 125 GeV has been observed at the LHC, which we show could be identified with the techni-dilaton (TD) predicted in the walking technicolor and thus should be an evidence of walking technicolor. The TD is a pseudo Nambu-Goldstone boson for the approximate scale symmetry spontaneously broken by techni-fermion condensation, with its lightness being ensured by the approximate scale invariance of the walking technicolor. We test the goodness-of-fit of the TD signatures using the presently available LHC data set, and show that the 125 GeV TD is actually favored by the current data to explain the reported signal strengths in the global fit as well as in each channel including the coupling properties, most notably the somewhat large diphoton event rate., 2 eps figures, 5 pages, latex; typos fixed, version published in PLB
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427. Techni-dilaton as dark matter
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Ki-Young Choi, Shinya Matsuzaki, and Deog Ki Hong
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Physics ,High Energy Physics - Phenomenology ,Nuclear and High Energy Physics ,Particle physics ,Range (particle radiation) ,High Energy Physics - Phenomenology (hep-ph) ,Dark matter ,High Energy Physics::Phenomenology ,Scalar field dark matter ,FOS: Physical sciences ,Dilaton ,Technicolor - Abstract
We propose a new dark matter candidate, {\it light decoupled techni-dilaton}, which arises from the almost scale-invariant/conformal (walking) technicolor. We investigate its characteristic nature and discuss several cosmological and astrophysical constraints. It turns out that techni-dilatons are extremely weakly interacting and produced dominantly by the non-thermal mechanism to be the main component of dark matter with mass range between around 0.01 eV and 500 eV for typical walking technicolor scenarios., Comment: 6 pages, 2 figures; version to appear in PLB
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428. New perspective in searching for axionlike particles from flavor physics.
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Hiroyuki Ishida, Shinya Matsuzaki, and Yoshihiro Shigekami
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CP violation , *FLAVOR in particle physics , *BRANCHING ratios , *MAGNETIC moments , *SWEETNESS (Taste) - Abstract
We propose new perspective in searching for axionlike particles (ALPs) from quark and lepton flavor physics: measurements of the time-dependent CP asymmetry in B0→K0Sπ0γ and the branching ratio of Bs→e±μ∓ decay possess, along with the anomalous magnetic moment of muon. In the mass range of sub-GeV, accessible by the flavorful ALPs search, the experimental sensitivity for these flavor observables reaches the maximum at around the pion mass scale (called the sweetest spots), where a couple of loopholes (unexplored regions) for the ALP parameter space have heretofore been present, because of an unavoidable contamination with pion background events. The proposed complementary probes can precisely determine the ALP coupling to photon at these sweetest spots/loopholes, and will significantly help cover whole parameter spaces in the ALP search including the present loopholes in the future. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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429. Financial viewpoint of minimally invasive radical hysterectomy for early cervical cancer: another disadvantage?
- Author
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Koji Matsuo, Shinya Matsuzaki, Mandelbaum, Rachel S., Klar, Maximilian, and Roman, Lynda
- Abstract
The article discusses the findings of the LACC trial which showed that minimally invasive radical hysterectomy for early cervical cancer is not associated with improved quality of life after surgery compared with open radical hysterectomy. Topics covered include other disadvantages of the minimally invasive approach, including increased risk of disease and death, a similar peri-operative morbidity, and higher inpatient cost.
- Published
- 2020
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430. Analysis of nonperturbative flavor violation at chiral crossover criticality in QCD.
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Mamiya Kawaguchi, Shinya Matsuzaki, and Akio Tomiya
- Subjects
- *
MESONS , *CHIRAL perturbation theory , *QUANTUM chromodynamics , *FLAVOR , *CRITICAL temperature - Abstract
We discuss the violation of quark-flavor symmetry at high temperatures, induced from nonperturbative thermal loop corrections and axial anomaly, based on a three-flavor linear-sigma model including an SU(3) flavor violation induced by U(1)A anomaly which we call an axial-anomaly induced-flavor breaking term. We employ a nonperturbative analysis following the Cornwall-Jackiw-Tomboulis formalism, and show that the model undergoes a chiral crossover with a pseudocritical temperature, consistently with lattice observations. We find following features regarding the flavor breaking eminent around and above the pseudocritical temperature: (i) up-and down-quark condensates drop faster than the strange quark's toward the criticality, but still keep nonzero value even going far above the critical temperature; (ii) the introduced anomaly-related flavor-breaking effect acts as a catalyzer toward the chiral restoration, and reduces the amount of flavor breaking in the up, down and strange quark condensates; (iii) a dramatic deformation for the meson flavor mixing structure is observed, in which the anomaly-induced favor breaking is found to be almost irrelevant; (iv) the meson spectroscopy gets corrected by the net nonperturbative flavor breaking effects, where the scalar meson mass hierarchy (inverse mass hierarchy) is significantly altered by the presence of the anomaly-related flavor breaking; (v) the topological susceptibility significantly gets the contribution from the surviving strange quark condensate, which cannot be dictated by the chiral perturbation theory, and deviates from the dilute instanton gas prediction. There the anomaly-induced flavor breaking plays a role of the destructive interference for the net flavor violation, as in the flavor breaking in the quark condensates; (vi) the U(1)A breaking signaled by nonzero topological susceptibility is enhanced by the nonperturbative strange quark condensate, which may account for the tension in the effective restoration of the U(1)A symmetry currently observed on lattices with two flavors and 2+1 flavors near the chiral limit. Our founding critical natures can be checked in the future lattice simulations, and will give some implications to the thermal history of QCD axion. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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431. F(R) gravity in the early Universe: electroweak phase transition and chameleon mechanism.
- Author
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Taishi Katsuragawa, Shinya Matsuzaki, and Eibun Senaha
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- 2019
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432. Proteomics reveals similar protein expression profiles of uterine cervical and lung small cell carcinoma
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Takata, Tomomi, Yoshino, Kiyoshi, Hiramatsu, Kosuke, Nakagawa, Satoshi, Serada, Satoshi, Nakajima, Aya, Endo, Hiroko, Shinya Matsuzaki, Ueda, Yutaka, Inoue, Masahiro, Naka, Tetsuji, and Kimura, Tadashi
433. Perioperative venous thromboembolism in patients with gynecological malignancies: A lesson from four years of recent clinical experience
- Author
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Morimoto, Akiko, Ueda, Yutaka, Yokoi, Takeshi, Tokizawa, Yuki, Yoshino, Kiyoshi, Fujita, Masami, Kimura, Toshihiro, Kobayashi, Eiji, Shinya Matsuzaki, Egawa-Takata, Tomomi, Sawada, Kenjiro, Tsutsui, Tateki, and Kimura, Tadashi
434. Clear cell adenocarcinoma of the peritoneum: a case report and literature review
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Kiyoshi Yoshino, Yutaka Ueda, Naoya Shigeta, Eiichi Morii, Tadashi Kimura, and Shinya Matsuzaki
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Poor prognosis ,Pathology ,medicine.medical_specialty ,animal structures ,Endometriosis ,Case Report ,Endosonography ,Peritoneal Neoplasm ,Peritoneum ,Ovarian cancer ,Obstetrics and Gynaecology ,medicine ,Humans ,Clear-cell adenocarcinoma ,Peritoneal Neoplasms ,business.industry ,fungi ,Obstetrics and Gynecology ,Middle Aged ,medicine.disease ,Magnetic Resonance Imaging ,medicine.anatomical_structure ,Treatment Outcome ,Oncology ,Clear cell adenocarcinoma ,Adenocarcinoma ,Female ,Pouch ,business ,Adenocarcinoma, Clear Cell - Abstract
Clear cell adenocarcinoma (CCC) is generally thought to originate from ovarian, endometrial, or renal tissue. A CCC of the peritoneum (CCAP) is an extremely rare medical condition and is associated with a poor prognosis. To date, only 10 cases of CCAP have been reported, of which half resulted in death or recurrence within 6 months after initial treatment because CCAP is commonly resistant to multiple drugs. In this report, we present a case of CCAP of the pouch of Douglas coexisting with an endometriosis and we offer a review of the related literature.
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435. PREPARATION OF PRIMARY CULTURE CELLS FROM A LCNEC OF UTERINE CORPUS USING CTOS (CANCER TISSUE-ORIGINATED SPHEROID) METHOD
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Kiyohara, Y., Yoshino, K., Hiramatsu, K., Takata, T., Shinya Matsuzaki, Kimura, T., Kobayashi, E., Ueda, Y., Fujita, M., and Inoue, M.
436. Cesarean delivery via a transverse uterine fundal incision for the successful management of a low-lying placenta and aplastic anemia
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Shinya Matsuzaki, Yoshino, K., Mimura, K., Kanagawa, T., and Kimura, T.
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Reproductive Medicine ,Obstetrics and Gynecology
437. PHASE I/II TRIAL OF GLIF FOR TAXANE/PLATINUM-RESISTANT ENDOMETRIAL CANCER
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Nakagawa, S., Ueda, Y., Shinya Matsuzaki, Takata, T., Kobayashi, E., Sawada, K., Tomimatsu, T., Yoshino, K., and Kimura, T.
438. One-Loop Corrections to the S and T Parameters in a Three Site Higgsless Model
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Elizabeth H. Simmons, R. Sekhar Chivukula, Shinya Matsuzaki, and Masaharu Tanabashi
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Physics ,Gauge boson ,Quantum Physics ,Electroweak interaction ,High Energy Physics::Phenomenology ,FOS: Physical sciences ,Molecular ,Technicolor ,hep-ph ,Gauge (firearms) ,Tower (mathematics) ,Atomic ,Nuclear & Particles Physics ,Standard Model ,Loop (topology) ,High Energy Physics - Phenomenology ,High Energy Physics - Phenomenology (hep-ph) ,Particle and Plasma Physics ,Nuclear ,Scaling ,Astronomical and Space Sciences ,Mathematical physics - Abstract
In this paper we compute the the one-loop chiral logarithmic corrections to the S and T parameters in a highly deconstructed Higgsless model with only three sites. In addition to the electroweak gauge bosons, this model contains a single extra triplet of vector states (which we denote \rho^{\pm} and \rho^0), rather than an infinite tower of "KK" modes. We compute the corrections to S and T in 'tHooft-Feynman gauge, including the ghost, unphysical Goldstone-boson, and appropriate "pinch" contributions required to obtain gauge-invariant results for the one-loop self-energy functions. We demonstrate that the chiral-logarithmic corrections naturally separate into two parts, a model-independent part arising from scaling below the \rho mass, which has the same form as the large Higgs-mass dependence of the S or T parameter in the standard model, and a second model-dependent contribution arising from scaling between the \rho mass and the cutoff of the model. The form of the universal part of the one-loop result allows us to correctly interpret the phenomenologically derived limits on the S and T parameters (which depend on a "reference" Higgs-boson mass) in this three-site Higgsless model. Higgsless models may be viewed as dual to models of dynamical symmetry breaking akin to "walking technicolor", and in these terms our calculation is the first to compute the subleading 1/N corrections to the S and T parameters. We also discuss the reduction of the model to the ``two-site'' model, which is the usual electroweak chiral lagrangian, noting the ``non-decoupling'' contributions present in the limit as M_\rho goes to infinity., Comment: 58 pages; uses JHEP and axodraw. Extensively corrected to incorporate consistent perturbative expansion, additional pinch contributions, and running of delocalization parameter. Footnotes added
439. LSR promotes beta-oxidation via lipid uptake and subsequent tumor growth in ovarian cancer
- Author
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Hiramatsu, Kosuke, Serada, Satoshi, Fujimoto, Minoru, Shinya Matsuzaki, Ueda, Yutaka, Yoshino, Kiyoshi, Kimura, Tadashi, and Naka, Tetsuji
440. Enhanced di-Higgs signal from hidden scalar QCD at leading-order in the scale-symmetry limit.
- Author
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Ouyang, Ruiwen and Shinya Matsuzaki
- Subjects
- *
ELECTROWEAK interactions , *GLUONS , *BOUND states , *FIRST-order phase transitions , *HIGGS bosons , *STANDARD deviations , *DILATON - Abstract
We develop an effective-model description arising from a recently proposed scale-invariant hidden scalar QCD, which has been used to explain the dynamical origin of the electroweak scale. In addition to the previous works, our new effective model includes the dynamical scale-anomaly effect from the hidden QCD gluons, to explicitly break the classical scale invariance at the level of an effective field theory, which is known as the leading-order scale symmetry (LOSS). In the phenomenological analysis, the proposed model predicts a light composite dilaton composed of hidden scalar quarks and gluons with the mass around electroweak scale (around 280 GeV), and has only one input parameter, which is the mixing angle between the Higgs boson and the composite dilaton. Our result for the dilaton mass is in accord with the lattice simulation for scalar QCD, where the scalar-quark bound states acquire a large effective mass from the hidden gluon contribution. Furthermore, we predict several significant deviations from the standard model (SM), like the di-Higgs production cross sections (maximally about 10 times larger than the SM prediction), that could be directly tested at the high luminosity LHC. It is also the first study for the di-Higgs production signal predicted from a scale(conformal)-invariant hidden sector, even from dark/hidden QCD. Our proposed effective model is thus significantly different than the conventional realization of scale-invariant hidden scalar QCD without the scale anomaly effect, and can potentially provide a competitive explanation for many exotic phenomena beyond the standard model, such as new dark matter candidates and a strongly first-order electroweak phase transition. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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441. Cosmic history of chameleonic dark matter in F(R) gravity.
- Author
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Taishi Katsuragawa and Shinya Matsuzaki
- Subjects
- *
HISTORY of cosmology , *GRAVITY , *DARK matter - Abstract
We study the cosmic history of the scalaron in F(R) gravity with constructing the time evolution of the cosmic environment and discuss the chameleonic dark matter based on the chameleon mechanism in the early and current Universe. We then find that the scalaron can be a dark matter. We also propose an interesting possibility that the F(R) gravity can address the coincidence problem. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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- View/download PDF
442. Scale generation via dynamically induced multiple seesaw mechanisms.
- Author
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Hiroyuki Ishida, Shinya Matsuzaki, Shohei Okawa, and Yuji Omura
- Subjects
- *
DARK matter , *STANDARD model (Nuclear physics) , *NEUTRINOS - Abstract
We propose a model which accounts for the dynamical origin of the electroweak symmetry breaking (EWSB), directly linking to the mass generation of dark matter (DM) candidates and active neutrinos. The standard model (SM) is weakly charged under the U(1)B-L gauge symmetry, in conjunction with newly introduced three right-handed Majorana neutrinos and the U(1)B-L Higgs. The model is built on the classical scale invariance, that is dynamically broken by a new strongly coupled sector, that is called the hypercolor (HC) sector, which is also weakly coupled to the U(1)B-L gauge. At the HC strong scale, the simultaneous breaking of the EW and U(1)B-L gauge symmetries is triggered by dynamically induced multiple seesaw mechanisms, namely bosonic seesaw mechanisms. Thus, all of the origins of masses are provided singly by the HC dynamics: that is what we call the dynamical scalegenesis. We also find that a HC baryon, with a mass on the order of a few TeV, can be stabilized by the HC baryon number and the U(1)B-L charge, so identified as a DM candidate. The relic abundance of the HC-baryon DM can be produced dominantly via the bosonic-seesaw portal process, and the HC-baryon DM can be measured through the large magnetic moment coupling generated from the HC dynamics, or the U(1)B-L-gauge boson portal in direct detection experiments. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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- View/download PDF
443. Dark matter in modified gravity?
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Taishi Katsuragawa and Shinya Matsuzaki
- Subjects
- *
DARK matter , *GRAVITY , *PARTICLE physics - Abstract
We explore a new horizon of modified gravity from the viewpoint of particle physics. As a concrete example, we take the F(R) gravity to raise a question: can a scalar particle ("scalaron") derived from the F(R) gravity be a dark matter candidate? We place the limit on the parameter in a class of F(R) gravity model from the constraint on the scalaron as a dark matter. The role of the screening mechanism and compatibility with the dark energy problem are addressed. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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- View/download PDF
444. Invisible axionlike dark matter from the electroweak bosonic seesaw mechanism.
- Author
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Hiroyuki Ishida, Shinya Matsuzaki, and Yuya Yamaguchi
- Subjects
- *
AXIONS , *DARK matter , *BOSONS - Abstract
We explore a model based on the classically scale-invariant standard model (SM) with a strongly coupled vectorlike dynamics, which is called hypercolor (HC). The scale symmetry is dynamically broken by the vectorlike condensation at the TeV scale, so that the SM Higgs acquires the negative mass squared by the bosonic seesaw mechanism to realize the electroweak symmetry breaking. An elementary pseudoscalar S is introduced to give masses for the composite Nambu-Goldstone bosons (HC pions): The HC pion can be a good target to explore through a diphoton channel at the LHC. As a consequence of the bosonic seesaw, the fluctuating mode of S, which we call s, develops tiny couplings to the SM particles and is predicted to be very light. The s predominantly decays to a diphoton and can behave as invisible axionlike dark matter. The mass of the s dark matter is constrained by currently available cosmological and astrophysical limits to be 10-4 eV≲ms≲1 eV. We find that a sufficient amount of relic abundance for the s dark matter can be accumulated via the coherent oscillation. The detection potential in microwave cavity experiments is also addressed. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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445. Higgs boson as a top-mode pseudo-Nambu-Goldstone boson.
- Author
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Fukano, Hidenori S., Masafumi Kurachi, Shinya Matsuzaki, and Koichi Yamawaki
- Subjects
- *
HIGGS bosons , *NAMBU-Goldstone bosons , *STANDARD model (Nuclear physics) , *RADIATIVE corrections , *FERMIONS , *ELECTROWEAK interactions - Abstract
In the spirit of the top-quark condensation, we propose a model which has a naturally light composite Higgs boson, "tHiggs" (hto) to be identified with the 126 GeV Higgs discovered at the LHC. The tHiggs, a bound state of the top quark and its flavor (vectorhke) partner, emerges as a pseudo-Nambu-Goldstone boson (NGB), "top-mode pseudo-Nambu-Goldstone boson," together with the exact NGBs to be absorbed into the W and Z bosons as well as another (heavier) top-mode pseudo-Nambu-Goldstone bosons (CP-odd composite scalar, A0t). Those five composite (exact/pseudo-) NGBs are dynamically produced simultaneously by a single supercritical four-fermion interaction having U(3) x U(1) symmetry which includes the electroweak symmetry, where the vacuum is aligned by a small explicit breaking term so as to break the symmetry down to a subgroup, U(2) x U(l)', in a way not to retain the electroweak symmetry, in sharp contrast to the little Higgs models. The explicit breaking term for the vacuum alignment gives rise to a mass of the tHiggs, which is protected by the symmetry and hence naturally controlled against radiative corrections. Realistic top-quark mass is easily realized similarly to the top-seesaw mechanism by introducing an extra (subcritical) four-fermion coupling which explicitly breaks the residual U(2)' x U(l)' symmetry with U(2)' being an extra symmetry besides the above U(3)L x U(1). We present a phenomenological Lagrangian of the top-mode pseudo-Nambu-Goldstone bosons along with the Standard Model particles, which will be useful for the study of the collider phenomenology. The coupling property of the tHiggs is shown to be consistent with the currently available data reported from the LHC. Several phenomenological consequences and constraints from experiments are also addressed. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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- View/download PDF
446. Chiral effective theories from holographic QCD with scalars.
- Author
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Harada, Masayasu, Yong-Liang Ma, and Shinya Matsuzaki
- Subjects
- *
QUANTUM chromodynamics , *KALUZA-Klein theories , *DIRAC equation , *LAGRANGIAN mechanics , *VECTOR mesons - Abstract
We develop a method for integrating out the heavy Kaluza-Klein modes of scalar type as well as those of vector and axial-vector types, in a class of hard-wall bottom-up approaches of holographic QCD models, including the Dirac-Born-Infeld and Chern-Simons parts. By keeping only the lowest-lying vector mesons, we first obtain an effective chiral Lagrangian of the vector mesons based on the hidden local symmetry, and all the low-energy constants in the HLS Lagrangian are expressed in terms of holographic integrals and, consequently, are fully determined by the holographic geometry and a few constants of mesons. We find that the Gell-Mann-Oakes-Renner relation is manifestly reproduced at the lowest order of derivative expansion. We also explicitly show that a naive inclusion of the Chern-Simons term cannot reproduce the desired chiral anomaly in QCD, and hence, some counterterms should be provided: This implies that the holographic QCD models of hard-wall type cannot give definite predictions for the intrinsic parity-odd vertices involving vector and axial-vector mesons. After integrating out the vector mesons from the HLS Lagrangian, we further obtain the Lagrangian of chiral perturbation theory for pseudoscalar mesons with all the low-energy constants fully determined. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
447. Chiral soliton lattice effect on baryonic matter from a skyrmion crystal model.
- Author
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Mamiya Kawaguchi, Yong-Liang Ma, and Shinya Matsuzaki
- Subjects
- *
CRYSTAL models , *SKYRMIONS , *BARYONS , *MATTER , *COMPACT objects (Astronomy) , *CRYSTAL lattices , *HYBRID systems , *BOSE-Einstein condensation - Abstract
The chiral soliton lattice (CSL), which has been studied in condensed-matter systems such as chiral magnets, arises as a parity-violating topological soliton. In hadron physics, various attempts have also been made to apply the idea of the CSL to baryonic matter. In this work, we explore the CSL effects on baryonic matter based on the skyrmion crystal approach by putting the CSL into the skyrmion crystal lattice. This system can be viewed as "medium-in-medium," where the hybrid system is constructed from skyrmions and the CSL within the mean field approximation. In this hybrid approach, it turns out that massless modes such as phonons are by accident invisible, though they should be present. It is found that the CSL causes an inverse catalysis for the topology change in dense baryonic matter. Furthermore, we observe that the CSL makes the single-baryon shape deformed to be higher-intensity objects with a definite frequency, which leads to the enhancement of baryon energy. Above the critical frequency of the CSL, the CSL structure goes away from the skyrmion crystal. Of interest is that in a high-density region, the CSL goes away due to the topology change in the baryonic matter. What we find here might deepen our understanding of dense-matter systems as well as compact stars. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
448. Magnetic field effect on nuclear matter from a Skyrmion crystal model.
- Author
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Mamiya Kawaguchi, Yong-Liang Ma, and Shinya Matsuzaki
- Subjects
- *
MAGNETIC field effects , *NUCLEAR matter , *SKYRMIONS - Abstract
We explore magnetic field effects on the nuclear matter based on the Skyrmion crystal approach for the first time. It is found that the magnetic effect plays the role of a catalyzer for the topology transition in the baryonic matter. Furthermore, we observe that in the presence of the magnetic field, the inhomogeneous chiral condensate persists in both the Skyrmion and the half-Skyrmion phases. Explicitly, as the strength of magnetic field gets larger, the inhomogeneous chiral condensate in the Skyrmion phase tends to be drastically localized, while in the half-Skyrmion phase the inhomogeneity configuration is hardly affected. It also turns out that a large magnetic effect in a low-density region distorts the baryon shape to an elliptic form but the crystal structure is intact. However, in a high-density region, the crystal structure is strongly affected by the strong magnetic field. A possible correlation between the chiral inhomogeneity and the deformation of the Skyrmion configuration is also addressed. The results obtained in this article might be realized in the deep interior of compact stars. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
449. Charged pions tagged with polarized photons probing strong CP violation in a chiral-imbalance medium.
- Author
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Mamiya Kawaguchi, Masayasu Harada, Shinya Matsuzaki, and Ruiwen Ouyang
- Subjects
- *
PHOTONS , *QUANTUM chromodynamics , *CP violation - Abstract
It is expected that in a hot QCD system, a local parity-odd domain can be produced due to nonzero chirality, which is induced from the difference of winding numbers carried by the gluon topological configuration (QCD sphaleron). This local domain is called the chiral-imbalance medium, characterized by nonzero chiral chemical potential, which can be interpreted as the time variation of the strong CP phase. We find that the chiral chemical potential generates the parity breaking term in the electromagnetic form factor of charged pions. Heavy ion collision experiments could observe the phenomenological consequence of this parity-odd form factor through the elastic scattering of a pion and a photon in the medium. Then we quantify the asymmetry rate of the parity violation by measuring the polarization of the photon associated with the pion, and discuss how it could be measured in a definite laboratory frame. We roughly estimate the typical size of the asymmetry, just by picking up the pion resonant process, and find that the signal can be sufficiently larger than possible background events from parity-breaking electroweak process. Our findings might provide a novel possibility to make a manifest detection for the remnant of the strong CP violation. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
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