Recent years have brought a revival of work on string theory, which haeen a source of fascination since its origins nearly twenty years ago.There seems to be a widely perceived need for a systematic, pedagogical exposition of the present state of knowledge about string theory. We hope that thiook will help to meet this need. To give a prehensive account of such a vast topic as string theory would scarcely be possible,even in two volumes with the length to which these have grown. Indeed,we have had to omit many important subjects, while treating others only sketchily. String field theory is omitted entirely (though the subject of chapter 11 is closely related to light-cone string field theory). Conformal field theory is not developed systematically, though much of the background material needed to understand recent papers on this subject is presented in chapter 3 and elsewhere.

本书内容涵盖粒子物理基础、宇宙线的物理（加速、相互作用）和天文（起源、传播）问题及其探测方法。针对目前广为采用的大气簇射实验，本书侧重讨论了大气簇射中宇宙线各成分（包括强子、光子、μ子和中微子）的理论模型及数值模拟方法。书中的理论分析简明直观，密切结合实验，具有较强的针对性。读者通过本书可以对宇宙线这个学科有整体和适当深度的了解。本书适合作为物理学专业高年级本科生和研究生的入门教材。对粒子物理标准模型和天文学有基础性的了解有助于对本书的理解。本书亦适合工作在宇宙线领域的专家学者参考。

在杨-米尔斯理论发表50周年之际，这本无价的文集回顾了由这一美妙思想引发出来的基本粒子物理的发展和成就。 在过去的50年，作为理论物理不可否认的最重要的基础，杨一米尔斯理论得到了广阔的发展。从各种视角对这一理论进行的研究，使理论以许多新的、没有预想到的面貌被揭示出来。在最近几十年，从高能物理延伸出去，该理论已经活跃地应用在物理学的其他分支中，诸如统计物理、凝聚态物理和非线性系统等，使这一理论成为所有从事物理学工作的人无法回避的课题。 在这本文集上发表文章或作更详细的技术上说明的是一个国际的专家团队，他们中的每一位专家都曾在这一非凡理论的发展中留下过自己的足迹。这些文章又从各位专家独到的视角凸现了这些新发现。

String theory is one of the most exciting and challenging areas of modern theoretical physics. It was developed in the late 1960s for the purpose of de-scribing the strong nuclear force. Problems were encountered that prevented this program from attaining plete success. In particular, it was realized that the dpectrum of a fundamental string contains an undesired massless spin-two particle. Quantum chromodynamics eventually proved to be the correct theory for describing the strong force and the properties of hadrons,New doors opened for string theory when in 1974 it was proposed to identify the massless spin-two particle in the string's spectrum with the graviton, the quantum of gravitation. String theory became then the most promising can-didate for a quantum theory of gravity unified with the other forces and has developed into one of the most fascinating the6ries of high-energy physics.

Recent years have brought a revival of work on string theory, which haeen a source of fascination since its origins nearly twenty years ago.There seems to be a widely perceived need for a systematic, pedagogical exposition of the present state of knowledge about string theory. We hope that thiook will help to meet this need. To give a prehensive account of such a vast topic as string theory would scarcely be possible,even in two volumes with the length to which these have grown. Indeed,we have had to omit many important subjects, while treating others only sketchily. String field theory is omitted entirely (though the subject of chapter 11 is closely related to light-cone string field theory). Conformal field theory is not developed systematically, though much of the background material needed to understand recent papers on this subject is presented in chapter 3 and elsewhere.

This highly regarded text provides an up-to-date and comprehensive introduction to modem particle physics. Extensively rewritten and updated, this fourth edition includes all the recent developments in elementary particle physics, as well as its connections with cosmology and astrophysics. As in previous editions, the balance between experiment and theory is continually emphasized. The stress is on the phenomenological approach and basic theoretical concepts rather than rigorous mathematical detail. Short descriptions are given of some of the key experiments in the field, and how they have influenced our thinking. Although most of the material is presented in the context of the Standard Model of quarks and leptons, the shortcomings of this model and new physiceyond its compass (such as super symmetry, neutrino mass and oscillations, GUTs and superstrings) are also discussed. The text includes many problems and a detailed and annotated further reading list. This is a text suitable for final-year p

WhenIfirstdecidedtowriteabookonstringtheory,morethantenyearsago,mymemoriesofmystudentyearsweremuchmorevividthantheyaretoday.Still,Irememberthatoneofthegreatestpleasureswasfindingatextthatmadeadifficultsubjectaccessible,andIhopedtoprovidethesameforstringtheory.Thus,myfirstpurposewastogiveacoherentintroductiontostringtheory,basedonthePolyakovpathintegralandconformalfieldtheory.Nopreviousknowledgeofstringtheoryisassumed.Idoassumethatthereaderisfamiliarwiththecentralideasofgeneralrelativity,suchasmetricsandcurvature,andwiththeideasofquantumfieldtheorythroughnon-Abeliangaugesymmetry.Originallyafullcourseofquantumfieldtheorywasassumedasaprerequisite,butitbecameclearthatmanystudentswereeagertolearnstringtheoryassoonaspossible,andthatothershadtakencoursesonquantumfieldtheorythatdidnotemphasizethetoolsneededforstringtheory.Ihavethereforetriedtogiveaself-containedintroductiontothosetools.Asecondpurposewastoshowhowsomeofthesimplestfour-dimensionalstringtheoriesconnectwithpreviousideasforunifyingtheStandardModel,andtocol

Thistextbookisbasedontheone-semestercourse"IntroductiontoAstrophysics，"takenbythird-yearphysicsstudentsatTel-AvivUniversity，whichItaughtseveraltimesintheyears2000-2005.Myobjectiveinwritingthisbookistoprovideanintroductoryastronomytextthatissuitedforuniversitystudentsmajoringinphysicalsciencefields（physics，astronomy，chemistry，engineering，etc.），ratherthanforawideraudience，forwhichmanyastronomytextbooksalreadyexist.Ihavetriedtocoveralargeandrepresentativefractionofthemainelementsofmodernastrophysics，includingsometopicsattheforefrontofcurrentresearch.Atthesametime，Ihavemadeanefforttokeepthisbookconcise.

Recent years have brought a revival of work on string theory, which haeen a source of fascination since its origins nearly twenty years ago.There seems to be a widely perceived need for a systematic, pedagogical exposition of the present state of knowledge about string theory. We hope that thiook will help to meet this need. To give a prehensive account of such a vast topic as string theory would scarcely be possible,even in two volumes with the length to which these have grown. Indeed,we have had to omit many important subjects, while treating others only sketchily. String field theory is omitted entirely (though the subject of chapter 11 is closely related to light-cone string field theory). Conformal field theory is not developed systematically, though much of the background material needed to understand recent papers on this subject is presented in chapter 3 and elsewhere.